1
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Bu F, Gao Y, Zhao W, Cao Q, Deng Y, Chen J, Pu J, Yang J, Wang Y, Yang N, Meng T, Liu X, Guan C. Bio-Inspired Trace Hydroxyl-Rich Electrolyte Additives for High-Rate and Stable Zn-Ion Batteries at Low Temperatures. Angew Chem Int Ed Engl 2024; 63:e202318496. [PMID: 38180310 DOI: 10.1002/anie.202318496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
High-rate and stable Zn-ion batteries working at low temperatures are highly desirable for practical applications, but are challenged by sluggish kinetics and severe corrosion. Herein, inspired by frost-resistant plants, we report trace hydroxyl-rich electrolyte additives that implement a dual remodeling effect for high-performance low-temperature Zn-ion batteries. The additive with high Zn absorbability not only remodels Zn2+ primary solvent shell by alternating H2 O molecules, but also forms a shielding layer thus remodeling the Zn surface, which effectively enhances fast Zn2+ de-solvation reaction kinetics and prohibits Zn anode corrosion. Taking trace α-D-glucose (αDG) as a demonstration, the electrolyte obtains a low freezing point of -55.3 °C, and the Zn//Zn cell can stably cycle for 2000 h at 5 mA cm-2 under -25 °C, with a high cumulative capacity of 5000 mAh cm-2 . A full battery that stably operates for 10000 cycles at -50 °C is also demonstrated.
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Affiliation(s)
- Fan Bu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Ningbo Institute of Northwestern Polytechnical University, Northwestern Polytechnical University, Ningbo, 315103, China
| | - Yong Gao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Wenbo Zhao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Qinghe Cao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Ningbo Institute of Northwestern Polytechnical University, Northwestern Polytechnical University, Ningbo, 315103, China
| | - Yifan Deng
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Jipeng Chen
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Jie Pu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Jiayu Yang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Yuxuan Wang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Nute Yang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Ting Meng
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Ningbo Institute of Northwestern Polytechnical University, Northwestern Polytechnical University, Ningbo, 315103, China
| | - Xiangye Liu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Ningbo Institute of Northwestern Polytechnical University, Northwestern Polytechnical University, Ningbo, 315103, China
| | - Cao Guan
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Ningbo Institute of Northwestern Polytechnical University, Northwestern Polytechnical University, Ningbo, 315103, China
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2
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Yang N, Gao Y, Bu F, Cao Q, Yang J, Cui J, Wang Y, Chen J, Liu X, Guan C. Backside Coating for Stable Zn Anode with High Utilization Rate. Adv Mater 2024:e2312934. [PMID: 38349956 DOI: 10.1002/adma.202312934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/07/2024] [Indexed: 02/15/2024]
Abstract
Stable Zn anodes with high utilization rate are urgently required to promote the specific and volumetric energy densities of Zn-ion batteries for practical applications. Herein, contrary to the widely utilized surface coating on Zn anodes, this work shows that a zinc foil with a backside coated layer delivers much enhanced cycling stability even under high depth of discharge. The backside coating significantly reduces stress concentration, accelerates heat diffusion, and facilitates electron transfer, thus effectively preventing dendrite growth and structural damage at high Zn utilization. As a result, the developed anode can be stably cycled for 334 h at 85.5% Zn utilization, which outperforms bare Zn and previously reported results on surface-coated Zn foils. An NVO-based full cell also shows stable performance with high Zn utilization rate (69.4%), low negative-positive electrodes ratio (1.44), and high specific/volumetric energy densities (155.8 Wh kg-1/178 Wh L-1), which accelerates the progress toward practical zinc-ion batteries.
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Affiliation(s)
- Nute Yang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Yong Gao
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Fan Bu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Qinghe Cao
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Jiayu Yang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Jiaojiao Cui
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Yuxuan Wang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Jipeng Chen
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Xiangye Liu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Cao Guan
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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3
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Liu X, Zhang P, Wang S, Fang Y, Wu P, Xiang Y, Chen J, Zhao C, Zhang X, Zhao W, Wang J, Huang F, Guan C. High intrinsic phase stability of ultrathin 2M WS 2. Nat Commun 2024; 15:1263. [PMID: 38341471 DOI: 10.1038/s41467-024-45676-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 01/31/2024] [Indexed: 02/12/2024] Open
Abstract
Metallic 2M or 1T'-phase transition metal dichalcogenides (TMDs) attract increasing interests owing to their fascinating physicochemical properties, such as superconductivity, optical nonlinearity, and enhanced electrochemical activity. However, these TMDs are metastable and tend to transform to the thermodynamically stable 2H phase. In this study, through systematic investigation and theoretical simulation of phase change of 2M WS2, we demonstrate that ultrathin 2M WS2 has significantly higher intrinsic thermal stabilities than the bulk counterparts. The 2M-to-2H phase transition temperature increases from 120 °C to 210 °C in the air as thickness of WS2 is reduced from bulk to bilayer. Monolayered 1T' WS2 can withstand temperatures up to 350 °C in the air before being oxidized, and up to 450 °C in argon atmosphere before transforming to 1H phase. The higher stability of thinner 2M WS2 is attributed to stiffened intralayer bonds, enhanced thermal conductivity and higher average barrier per layer during the layer(s)-by-layer(s) phase transition process. The observed high intrinsic phase stability can expand the practical applications of ultrathin 2M TMDs.
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Affiliation(s)
- Xiangye Liu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Pingting Zhang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Shiyao Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Yuqiang Fang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai, Shanghai, 200050, China
| | - Penghui Wu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Yue Xiang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Jipeng Chen
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Chendong Zhao
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai, Shanghai, 200050, China
| | - Xian Zhang
- Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing, 100094, China
| | - Wei Zhao
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai, Shanghai, 200050, China
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, China
| | - Fuqiang Huang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai, Shanghai, 200050, China
| | - Cao Guan
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China.
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China.
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4
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Meng T, Ma F, Gao Y, Geng Z, Wang X, Chen J, Zhang H, Guan C. Functional Laminated Fiber Scaffold Based on Titanium Monoxide for Lithium Metal-Based Batteries. Small 2024; 20:e2304734. [PMID: 37828641 DOI: 10.1002/smll.202304734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/31/2023] [Indexed: 10/14/2023]
Abstract
Lithium metal-based rechargeable batteries are attracting increasing attention due to their high theoretical specific capacity and energy density. However, the dendrite growth leads to short circuits or even explosions and rapid depletion of active materials and electrolytes. Here, a functionalized and laminated scaffold (PVDF/TiO@C fiber) based on lithiophilic titanium monoxide is rationally designed to inhibit dendrite growth. Specifically, the bottom TiO@C fiber sublayer provides rich Li nucleation sites and facilitates the formation of stable solid electrolyte interphase. Together with the top lithiophobic PVDF sublayer, the prepared freestanding scaffold can effectively suppress the growth of Li dendrite and ensure stable Li plating/stripping. Based on the dendrite-free deposition, the Li/PVDF/TiO@ C fiber anode enables over 1000 h at a current density of 1 mA cm-2 in a symmetrical cell and delivers superior electrochemical performance in both Li || LFP and Li-S batteries. The functional laminated fiber scaffold design provides essential insights for obtaining high-performance lithium metal anodes.
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Affiliation(s)
- Ting Meng
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Fei Ma
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Yong Gao
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Zeyu Geng
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Xiaohan Wang
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Jipeng Chen
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Haifeng Zhang
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Cao Guan
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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5
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Wang Y, Gao Y, He J, Yang J, Fu G, Cao Q, Pu J, Bu F, Xu X, Guan C. Sphere-Confined Reversible Zn Deposition for Stable Alkaline Aqueous Batteries. Adv Mater 2024; 36:e2307819. [PMID: 37797210 DOI: 10.1002/adma.202307819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/13/2023] [Indexed: 10/07/2023]
Abstract
The practical applications of alkaline zinc-based batteries are challenged by poor rechargeability with an insufficient zinc utilization ratio. Herein, a sphere-confined reversible zinc deposition behavior from a free-standing Zn anode is reported, which is composed of bi-continuous ZnO-protected interconnected and hollowed Zn microspheres by the Kirkendall effect. The cross-linked Zn network with in situ formed outer ZnO shell and inner hollow space not only inhibits side reactions but also ensures long-range conductivity and accommodates shape change, which induces preferential reversible zinc dissolution-deposition process in the inner space and maintains structural integrity even under high zinc utilization ratio. As a result, the Zn electrode can be stably cycled for 390 h at a high current density of 20 mA cm-2 (60% depth of discharge), outperforming previously reported alkaline Zn anodes. A stable zinc-nickel oxide hydroxide battery with a high cumulative capacity of 8532 mAh cm-2 at 60% depth of discharge is also demonstrated.
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Affiliation(s)
- Yuxuan Wang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Yong Gao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Junyuan He
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Jiayu Yang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Gangwen Fu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Qinghe Cao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576, Singapore
| | - Jie Pu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Fan Bu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Xi Xu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Cao Guan
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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6
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He J, Cao L, Cui J, Fu G, Jiang R, Xu X, Guan C. Flexible Energy Storage Devices to Power the Future. Adv Mater 2024; 36:e2306090. [PMID: 37543995 DOI: 10.1002/adma.202306090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/03/2023] [Indexed: 08/08/2023]
Abstract
The field of flexible electronics is a crucial driver of technological advancement, with a strong connection to human life and a unique role in various areas such as wearable devices and healthcare. Consequently, there is an urgent demand for flexible energy storage devices (FESDs) to cater to the energy storage needs of various forms of flexible products. FESDs can be classified into three categories based on spatial dimension, all of which share the features of excellent electrochemical performance, reliable safety, and superb flexibility. In this review, the application scenarios of FESDs are introduced and the main representative devices applied in disparate fields are summarized first. More specifically, it focuses on three types of FESDs in matched application scenarios from both structural and material aspects. Finally, the challenges that hinder the practical application of FESDs and the views on current barriers are presented.
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Affiliation(s)
- Junyuan He
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo, 315103, China
| | - Leiqing Cao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo, 315103, China
| | - Jiaojiao Cui
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo, 315103, China
| | - Gangwen Fu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo, 315103, China
| | - Ruiyi Jiang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo, 315103, China
| | - Xi Xu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo, 315103, China
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Sanhang Science &Technology Building, No. 45th, Gaoxin South 9th Road, Nanshan District, Shenzhen City, 518063, China
| | - Cao Guan
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, Ningbo, 315103, China
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7
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Pu J, Cao Q, Gao Y, Wang Q, Geng Z, Cao L, Bu F, Yang N, Guan C. Liquid Metal-Based Stable and Stretchable Zn-Ion Battery for Electronic Textiles. Adv Mater 2024; 36:e2305812. [PMID: 37714162 DOI: 10.1002/adma.202305812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/30/2023] [Indexed: 09/17/2023]
Abstract
Electronic textiles harmoniously interact with the human body and the surrounding environment, offering tremendous interest in smart wearable electronics. However, their wide application faces challenges due to the lack of stable and stretchable power electrodes/devices with multifunctional design. Herein, an intrinsically stretchable liquid metal-based fibrous anode for a stable Zn-ion battery (ZIB) is reported. Benefiting from the liquid feature and superior deformability of the liquid metal, optimized Zn ion concentration distribution and Zn (002) deposition behavior are observed, which result in dendrite-free performance even under stretching. With a strain of 50%, the ZIB maintains a high capacity of 139.8 mAh cm-3 (corresponding to 83.0% of the initial value) after 300 cycles, outperforming bare Zn fiber-based ZIB. The fibrous ZIB seamlessly integrates with the sensor, Joule heater, and wirelessly charging device, which provides a stable power supply for human signal monitoring and personal thermal management, holding promise for the application of wearable multifunctional electronic textiles.
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Affiliation(s)
- Jie Pu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Qinghe Cao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Yong Gao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Qiangzheng Wang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Zeyu Geng
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Leiqing Cao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Fan Bu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Nute Yang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Cao Guan
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
- Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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8
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Bu F, Gao Y, Wang Q, Wang Y, Li C, Yang J, Liu X, Guan C. Ultraviolet-Assisted Printing of Flexible Solid-State Zn-Ion Battery with a Heterostructure Electrolyte. Small 2023; 19:e2303108. [PMID: 37222117 DOI: 10.1002/smll.202303108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/08/2023] [Indexed: 05/25/2023]
Abstract
Flexible solid-state Zn-ion batteries (ZIBs) have garnered considerable attention for next-generation power sources, but the corrosion, dendrite growth, and interfacial problems severely hinder their practical applications. Herein, a high-performance flexible solid-state ZIB with a unique heterostructure electrolyte is facilely fabricated through ultraviolet-assisted printing strategy. The solid polymer/hydrogel heterostructure matrix not only isolates water molecules and optimizes electric field distribution for dendrite-free anode, but also facilitates fast and in-depth Zn2+ transport in the cathode. The in situ ultraviolet-assisted printing creates cross-linked and well-bonded interfaces between the electrodes and the electrolyte, enabling low ionic transfer resistance and high mechanical stability. As a result, the heterostructure electrolyte based ZIB outperforms single-electrolyte based cells. It not only delivers a high capacity of 442.2 mAh g-1 with long cycling life of 900 cycles at 2 A g-1 , but also maintains stable operation under mechanical bending and high-pressure compression in a wide temperature range (-20 °C to 100 °C).
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Affiliation(s)
- Fan Bu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Yong Gao
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Qiangzheng Wang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Yuxuan Wang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Chun Li
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Jiayu Yang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Xiangye Liu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Cao Guan
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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9
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Pulferer HS, Guan C, Muller-Putz GR. Continuous Erroneous Feedback Processing during Deviation from the Road within a 2D Steering Task . Annu Int Conf IEEE Eng Med Biol Soc 2023; 2023:1-4. [PMID: 38082976 DOI: 10.1109/embc40787.2023.10340764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Recent research of our group indicated that erroneous feedback processing can not only be detected via established correlates in the electroencephalogram (EEG) for discrete stimuli, but also arises as modulations of the brain signals when faced with a continuous and periodic error signal. However, limitations in our previous paradigm prevented a definitive statement on the error signal as the exclusive source of the modulations, as well as on the connection between the observed error-related negativity (ERN)-like and error positivity (Pe)-like continuous correlates. Within a new paradigm involving EEG recordings of 10 participants, we disentangled modulation sources, substantiating our hypothesis that the observed periodicity arises primarily due to feedback processing. Further, we provide evidence that the continuous ERN- and Pe-like potentials are locked to separate phases in the error signal, rather than time-locked to a shared event, indicating that both potentials arise independently of one another.
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10
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Du J, Fu G, Xu X, Elshahawy AM, Guan C. 3D Printed Graphene-Based Metamaterials: Guesting Multi-Functionality in One Gain. Small 2023; 19:e2207833. [PMID: 36760019 DOI: 10.1002/smll.202207833] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/08/2023] [Indexed: 05/11/2023]
Abstract
Advanced functional materials with fascinating properties and extended structural design have greatly broadened their applications. Metamaterials, exhibiting unprecedented physical properties (mechanical, electromagnetic, acoustic, etc.), are considered frontiers of physics, material science, and engineering. With the emerging 3D printing technology, the manufacturing of metamaterials becomes much more convenient. Graphene, due to its superior properties such as large surface area, superior electrical/thermal conductivity, and outstanding mechanical properties, shows promising applications to add multi-functionality into existing metamaterials for various applications. In this review, the aim is to outline the latest developments and applications of 3D printed graphene-based metamaterials. The structure design of different types of metamaterials and the fabrication strategies for 3D printed graphene-based materials are first reviewed. Then the representative explorations of 3D printed graphene-based metamaterials and multi-functionality that can be introduced with such a combination are further discussed. Subsequently, challenges and opportunities are provided, seeking to point out future directions of 3D printed graphene-based metamaterials.
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Affiliation(s)
- Junjie Du
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Gangwen Fu
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Xi Xu
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | | | - Cao Guan
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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11
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Li L, Cao Q, Wu Y, Zheng Y, Tang H, Ge J, Liang M, Zhou B, Jiang B, Wu S, Wang F, Pang Y, Shen Z, Guan C, Chen H. Wood-Derived Continuously Oriented Three-Phase Interfacial Channels for High-Performance Quasi-Solid-State Alkaline Zinc Batteries. Adv Mater 2023:e2300132. [PMID: 36964945 DOI: 10.1002/adma.202300132] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/22/2023] [Indexed: 05/16/2023]
Abstract
Although recently developed hybrid zinc (Zn) batteries integrate the benefits of both alkaline Zn and Zn-air batteries, the kinetics of the electrocatalytic oxygen reaction and mass transfer of the electrolyte, which are limited by the mismatched and disordered multiphase reaction's interfacial transfer channels, considerably inhibit the performance of hybrid Zn batteries. In this work, novel, continuously oriented three-phase interfacial channels at the cathode derived from the natural structure of pine wood are developed to address these challenges. A pine wood chip is carbonized and asymmetrically loaded with a hydrophilic active material to achieve the creation of a wood-derived cathode that integrates the active material, current collector, and continuously oriented three-phase reaction interfacial channels, which allows the reaction dynamics to be accelerated. Consequently, the assembled quasi-solid-state hybrid battery performs an extra charge-discharge process beyond that performed by a typical nickel (Ni)-Zn battery, resulting in a wide operating voltage range of 0.6-2.0 V and a superior specific capacity of 656.5 mAh g-1 , in addition to an excellent energy density (644.7 Wh kg-1 ) and good durability. The ≈370% capacity improvement relative to the Ni-Zn battery alone makes the hybrid battery one of the best-performing alkaline Zn batteries.
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Affiliation(s)
- Lanze Li
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Qinghe Cao
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Yitian Wu
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Yu Zheng
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Hongxuan Tang
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Jiujiu Ge
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Mengdi Liang
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Bao Zhou
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Baiyu Jiang
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Sai Wu
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Fan Wang
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Yajun Pang
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Zhehong Shen
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
| | - Cao Guan
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Hao Chen
- College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China
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12
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Cao Q, Gao Y, Pu J, Zhao X, Wang Y, Chen J, Guan C. Gradient design of imprinted anode for stable Zn-ion batteries. Nat Commun 2023; 14:641. [PMID: 36746943 PMCID: PMC9902526 DOI: 10.1038/s41467-023-36386-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 01/30/2023] [Indexed: 02/08/2023] Open
Abstract
Achieving long-term stable zinc anodes at high currents/capacities remains a great challenge for practical rechargeable zinc-ion batteries. Herein, we report an imprinted gradient zinc electrode that integrates gradient conductivity and hydrophilicity for long-term dendrite-free zinc-ion batteries. The gradient design not only effectively prohibits side reactions between the electrolyte and the zinc anode, but also synergistically optimizes electric field distribution, zinc ion flux and local current density, which induces preferentially deposited zinc in the bottom of the microchannels and suppresses dendrite growth even under high current densities/capacities. As a result, the imprinted gradient zinc anode can be stably cycled for 200 h at a high current density/capacity of 10 mA cm-2/10 mAh cm-2, with a high cumulative capacity of 1000 mAh cm-2, which outperforms the none-gradient counterparts and bare zinc. The imprinted gradient design can be easily scaled up, and a high-performance large-area pouch cell (4*5 cm2) is also demonstrated.
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Affiliation(s)
- Qinghe Cao
- grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University, Xi’an, 710072 China ,Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103 China ,grid.4280.e0000 0001 2180 6431Department of Materials Science and Engineering, National University of Singapore, Singapore, 117576 Singapore
| | - Yong Gao
- grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University, Xi’an, 710072 China ,Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103 China
| | - Jie Pu
- grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University, Xi’an, 710072 China ,Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103 China
| | - Xin Zhao
- grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University, Xi’an, 710072 China
| | - Yuxuan Wang
- grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University, Xi’an, 710072 China
| | - Jipeng Chen
- grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University, Xi’an, 710072 China
| | - Cao Guan
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China. .,Key laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China.
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13
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Gao Y, Cao Q, Pu J, Zhao X, Fu G, Chen J, Wang Y, Guan C. Stable Zn Anodes with Triple Gradients. Adv Mater 2023; 35:e2207573. [PMID: 36404070 DOI: 10.1002/adma.202207573] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 11/06/2022] [Indexed: 06/16/2023]
Abstract
Aqueous zinc-ion batteries are highly desirable for sustainable energy storage, but the undesired Zn dendrites growth severely shortens the cycle life. Herein, a triple-gradient electrode that simultaneously integrates gradient conductivity, zincophilicity, and porosity is facilely constructed for a dendrite-free Zn anode. The simple mechanical rolling-induced triple-gradient design effectively optimizes the electric field distribution, Zn2+ ion flux, and Zn deposition paths in the Zn anode, thus synergistically achieving a bottom-up deposition behavior for Zn metals and preventing the short circuit from top dendrite growth. As a result, the electrode with triple gradients delivers a low overpotential of 35 mV and operates steadily over 400 h at 5 mA cm-2 /2.5 mAh cm-2 and 250 h at 10 mA cm-2 /1 mAh cm-2 , far surpassing the non-gradient, single-gradient and dual-gradient counterparts. The well-tunable materials and structures with the facile fabrication method of the triple-gradient strategy will bring inspiration for high-performance energy storage devices.
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Affiliation(s)
- Yong Gao
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Qinghe Cao
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Jie Pu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Xin Zhao
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Gangwen Fu
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Jipeng Chen
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Yuxuan Wang
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Cao Guan
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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14
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Xu X, Fu G, Wang Y, Cao Q, Xun Y, Li C, Guan C, Huang W. Highly Efficient All-3D-Printed Electrolyzer toward Ultrastable Water Electrolysis. Nano Lett 2023; 23:629-636. [PMID: 36634273 DOI: 10.1021/acs.nanolett.2c04380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The practical application of electrochemical water splitting has been plagued by the sluggish kinetics of bubble generation and the slow escape of bubbles which block reaction surfaces at high current densities. Here, 3D-printed Ni (3DP Ni) electrodes with a rationally designed periodic structure and surface chemistry are reported, where the macroscopic ordered pores allow fast bubble evolution and emission, while the microporosity ensures a high electrochemically active surface area (ECSA). When they are further loaded with MoNi4 and NiFe layered double hydroxide active materials, the 3D electrodes deliver 500 mA cm-2 at an overpotential of 104 mV for the hydrogen evolution reaction (HER) and 310 mV for the oxygen evolution reaction (OER), respectively. An all-3D-printed alkaline electrolyzer (including electrodes, membrane, and cell) delivers 500 mA cm-2 at a remarkable voltage of 1.63 V with no noticeable performance decay after 1000 h. Such a tailored bubble trajectory demonstrates feasible solutions for future large-scale clean energy production.
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Affiliation(s)
- Xi Xu
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an710072, People's Republic of China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo315103, People's Republic of China
| | - Gangwen Fu
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an710072, People's Republic of China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo315103, People's Republic of China
| | - Yuxuan Wang
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an710072, People's Republic of China
| | - Qinghe Cao
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an710072, People's Republic of China
| | - Yanran Xun
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore117576, Singapore
| | - Chen Li
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an710072, People's Republic of China
| | - Cao Guan
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an710072, People's Republic of China
- Key Laboratory of Flexible Electronics of Zhejiang Province, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo315103, People's Republic of China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics and MIIT Key Laboratory of Flexible Electronics (KLoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an710072, People's Republic of China
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing210023, People's Republic of China
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15
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Tang H, Ge J, Li L, Zhu X, Wu S, Wang F, Pang Y, Shen Z, Guan C, Chen H. Ultrasound-induced elevation of interlayer spacing and conductivity of CoNi hydroxides for high-performance Ni–Zn batteries. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Xie Y, Cao J, Wang X, Li W, Deng L, Ma S, Zhang H, Guan C, Huang W. MOF-Derived Bifunctional Co 0.85Se Nanoparticles Embedded in N-Doped Carbon Nanosheet Arrays as Efficient Sulfur Hosts for Lithium-Sulfur Batteries. Nano Lett 2021; 21:8579-8586. [PMID: 34652920 DOI: 10.1021/acs.nanolett.1c02037] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lithium-sulfur batteries possess the merits of low cost and high theoretical energy density but suffer from the shuttle effect of lithium polysulfides and slow redox kinetics of sulfur. Herein, novel Co0.85Se nanoparticles embedded in nitrogen-doped carbon nanosheet arrays (Co0.85Se/NC) were constructed on carbon cloth as the self-supported host for a sulfur cathode using a facile fabrication strategy. The interconnected porous carbon-based structure of the Co0.85Se/NC could facilitate the rapid electron and ion transfer kinetics. The embedded Co0.85Se nanoparticles can effectively capture and catalyze lithium polysulfides, thus accelerating the redox kinetics and stabilizing sulfur cathodes. Therefore, the Co0.85Se/NC-S cathode could maintain a stable cycle performance for 400 cycles at 1C and deliver a high discharge specific capacity of 1361, 1001, and 810 mAh g-1 at current densities of 0.1, 1, and 3C, respectively. This work provides an efficient design strategy for high-performance lithium-sulfur batteries with high energy densities.
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Affiliation(s)
- Yonghui Xie
- College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China
| | - Jiaqi Cao
- College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China
| | - Xinghui Wang
- College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou 213000, China
| | - Wangyang Li
- College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China
| | - Liying Deng
- College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China
| | - Shun Ma
- College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China
| | - Hong Zhang
- College of Physics and Information Engineering, Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, China
| | - Cao Guan
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Wei Huang
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
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17
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Hussain S, Li X, Bukhari SM, Zhou M, Ahmad S, Ahmad S, Javid A, Guan C, Hussain A, Ali W, Khalid N, Ahmad U, Tian L, Hou Z. Cross-genera amplification and identification of Colpodella sp. with Cryptosporidium primers in fecal samples of zoo felids from northeast China. BRAZ J BIOL 2021; 83:e247181. [PMID: 34495161 DOI: 10.1590/1519-6984.247181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 02/18/2021] [Indexed: 11/22/2022] Open
Abstract
The protozoans include many intracellular human pathogens. Accurate detection of these pathogens is necessary to treat the diseases. In clinical epidemiology, molecular identification of protozoan is considered a more reliable and rapid method for identification than microscopy. Among these protozoans, Cryptosporidium considered being one of the important water-borne zoonotic pathogens and a major cause of a diarrheal disease named cryptosporidiosis in humans, domestic animals, and wild animals. This study was aimed to identify Cryptosporidium in zoo felids (N= 56) belonging to different zoo of China, but accidentlly Colpodella was encountered in the zoo felids sample and phylogenetic data confirmed this unexpected amplification from fecal samples using two-step nested-PCR. Phylogenetic analysis revealed the fact about the specific primers used previously by many researchers and cross-genera amplification. We came to know that genetically sequenced amplicon gives more accurate identification of species. This study suggests more investigation on Colpodella which has been neglected previously but gains the attention of researchers after identified from humans and animals and has been known to correlate with neurological symptoms in patients.
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Affiliation(s)
- S Hussain
- Northeast Forestry University, College of Wildlife and Protected Area, Harbin, China
| | - X Li
- Harbin Northern Forest Zoo, Harbin, China
| | - S M Bukhari
- University of Veterinary and Animal Sciences, Department of Wildlife and Ecology, Lahore, Pakistan
| | - M Zhou
- Northeast Forestry University, College of Wildlife and Protected Area, Harbin, China
| | - S Ahmad
- Department of Entomology, University of the Punjab, Lahore, Pakistan
| | - S Ahmad
- Department of Entomology, University of the Punjab, Lahore, Pakistan
| | - A Javid
- University of Veterinary and Animal Sciences, Department of Wildlife and Ecology, Lahore, Pakistan
| | - C Guan
- Harbin Northern Forest Zoo, Harbin, China
| | - A Hussain
- University of Veterinary and Animal Sciences, Department of Wildlife and Ecology, Lahore, Pakistan
| | - W Ali
- University of Veterinary and Animal Sciences, Department of Wildlife and Ecology, Lahore, Pakistan
| | - N Khalid
- University of Veterinary and Animal Sciences, Department of Wildlife and Ecology, Lahore, Pakistan
| | - U Ahmad
- University of Veterinary and Animal Sciences, Department of Wildlife and Ecology, Lahore, Pakistan
| | - L Tian
- Northeast Forestry University, College of Wildlife and Protected Area, Harbin, China
| | - Z Hou
- Northeast Forestry University, College of Wildlife and Protected Area, Harbin, China.,China State Forestry Administration, Key Laboratory of Wildlife Conservation, Harbin, China
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18
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Su S, Tang X, Che H, Zhen J, Liu L, Zhao N, Liu J, Guan C, Fu S, Wang L, Li H, Zhang D, Wang Q, Zhen D. [Correlation of baseline serum 25-hydroxyvitamin D level with the risk of type 2 diabetes mellitus: a prospective cohort study]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:811-819. [PMID: 34238732 DOI: 10.12122/j.issn.1673-4254.2021.06.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the correlation of baseline serum 25(OH) D level with the risk of type 2 diabetes mellitus (T2DM) and blood glucose control in diabetic patients among the middle-aged and elderly individuals in Chengguan District of Lanzhou, Gansu Province. OBJECTIVE Residents aged 40 to 75 years in Lanzhou were selected from the "REACTION" study conducted in 2011 and had been followed up since 2014. A total of 5044 subjects with complete data from the two surveys were analyzed. Participants were divided into Q1, Q2, Q3, and Q4 subgroups based on quartiles of serum 25(OH)D level for comparison of the incidence of T2DM and blood glucose control. OBJECTIVE Baseline 25(OH)D level was not found to correlate with FPG, 2h-PG or HbA1c levels among the residents (P>0.05). The participants were followed up for a mean of 3.4±0.6 years, and compared with those in Q1 group, the participants in Q2, Q3 and Q4 groups did not show significantly lowered risk of prediabetes or diabetes regardless of glucose tolerance status. Among the patients with T2DM, the compliance rate of glycemic control after the follow-up was significantly higher than that before the follow-up (63.4% vs 60.6%), and the levels of HbA1c, FPG, and 2h-PG decreased obviously after the follow-up. But compared with Q1 group, Q2, Q3 and Q4 groups showed no significant changes in glycemic control compliance rate or levels of HbA1c, FPG and 2h-PG after the follow-up (P>0.05). OBJECTIVE There is no evidence that baseline 25(OH)D levels are associated with the risk of diabetes and blood glucose control in patients with T2DM.
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Affiliation(s)
- S Su
- First Clinical Medical College First Hospital of Lanzhou University, Lanzhou 730000 China.,Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - X Tang
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - H Che
- Department of Endocrinology, Gansu Provincial Third People's Hospital, Lanzhou 730000, China
| | - J Zhen
- Department of Gynecology, Gansu Provincial People's Hospital, Lanzhou 730000, China
| | - L Liu
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - N Zhao
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - J Liu
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - C Guan
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - S Fu
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - L Wang
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - H Li
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - D Zhang
- First Clinical Medical College First Hospital of Lanzhou University, Lanzhou 730000 China.,Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - Q Wang
- First Clinical Medical College First Hospital of Lanzhou University, Lanzhou 730000 China.,Department of Endocrinology, Gansu Provincial Third People's Hospital, Lanzhou 730000, China
| | - D Zhen
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
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Yu R, Wang G, Yu X, Li L, Li C, Song Y, Xu Z, Zhang J, Guan C. Assessing alfalfa (Medicago sativa L.) tolerance to salinity at seedling stage and screening of the salinity tolerance traits. Plant Biol (Stuttg) 2021; 23:664-674. [PMID: 33884732 DOI: 10.1111/plb.13271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 04/11/2021] [Indexed: 06/12/2023]
Abstract
Salt is among the most harmful agents that negatively influences crop yield. Alfalfa is an important perennial forage crop that exhibits wide cultivar variations in salt tolerance. Developing salt-tolerant alfalfa plants is a promising way to utilize salinized land. A comprehensive method was developed to achieve reliable and effective evaluation of alfalfa salt resistance. This included principal components, membership functions and cluster and stepwise regression analyses. These were used to analyse the salt tolerance coefficients of 14 traits and to evaluate 20 diverse alfalfa cultivars at the seedling stage. The various morphological root parameters of six alfalfa cultivars with contrasting salt tolerance were also tested by a scanning apparatus. According to the comprehensive evaluation value (D value), one highly salt-tolerant, two salt-tolerant, four moderately salt-tolerant and 13 salt-sensitive alfalfa cultivars were screened. A mathematical equation for the evaluation of alfalfa salt tolerance was established: D' = -0.126 + 0.667SFW + 0.377SDW + 1.089K+ /Na+ + 0.172SFW/RFW (R2 = 0.988; average forecast accuracy of 96.95%), where four indices were closely related to the salt tolerance: shoot fresh weight, ratio of shoot fresh weight to root fresh weight, shoot dry weight and ratio of K+ to Na+ in the shoot. We also found that SSA correlated strongly with SFW, SDW, K+ /Na+ , D values, while SRV correlated obviously with SFW, SFW/RFW and D values after 150 mm NaCl treatment. In conclusion, the SFW, K+ /Na+ , SDW, SFW/RFW, SSA and SRV could be used as indicators of salt tolerance in alfalfa seedlings grown under 150 mm NaCl treatment.
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Affiliation(s)
- R Yu
- College of Life Sciences, Huaibei Normal University, Huaibei, Anhui, China
| | - G Wang
- Shandong Institute of Agricultural Sustainable Development, Jinan, Shandong, China
| | - X Yu
- College of Life Sciences, Huaibei Normal University, Huaibei, Anhui, China
| | - L Li
- College of Life Sciences, Huaibei Normal University, Huaibei, Anhui, China
| | - C Li
- College of Life Sciences, Huaibei Normal University, Huaibei, Anhui, China
| | - Y Song
- College of Life Sciences, Huaibei Normal University, Huaibei, Anhui, China
| | - Z Xu
- College of Life Sciences, Huaibei Normal University, Huaibei, Anhui, China
- Purple pasture Co., Ltd, Wuhe, Bengbu, Anhui, China
| | - J Zhang
- Shandong Institute of Agricultural Sustainable Development, Jinan, Shandong, China
| | - C Guan
- Shandong Institute of Agricultural Sustainable Development, Jinan, Shandong, China
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20
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Jonhson W, Xu X, Zhang D, Chua WT, Tan YH, Liu X, Guan C, Tan XH, Li Y, Herng TS, Goh JCH, Wang J, He H, Ding J. Fabrication of 3D-Printed Ceramic Structures for Portable Solar Desalination Devices. ACS Appl Mater Interfaces 2021; 13:23220-23229. [PMID: 33955218 DOI: 10.1021/acsami.1c04209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Affiliation(s)
- Win Jonhson
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - Xi Xu
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
- Institute of Flexible Electronics, Xi’an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Danwei Zhang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - Wei Ting Chua
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - Yong Hao Tan
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - Ximeng Liu
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - Cao Guan
- Institute of Flexible Electronics, Xi’an Key Laboratory of Flexible Electronics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Xuan Hao Tan
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 4 Engineering Drive 3, Block E4, Singapore 117583, Singapore
| | - Yuemeng Li
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - Tun Seng Herng
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - James Cho-Hong Goh
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 4 Engineering Drive 3, Block E4, Singapore 117583, Singapore
| | - John Wang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
| | - Hui He
- School of Mechanical Engineering, Shanghai Jiaotong University, F306 Mechanical Building 800 Dongchuan Road Minhang, Shanghai 200240, China
| | - Jun Ding
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA, Singapore 117575, Singapore
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21
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Wang Y, Wang QY, Guan C, Zhang X, Guo YF. [Association between lipoprotein (a) level and chronic cardio-renal syndrome in elderly patients]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:1047-1052. [PMID: 33355749 DOI: 10.3760/cma.j.cn112148-20200331-00270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the relationship between lipoprotein(a) [Lp(a)] and chronic cardio-renal syndrome (CRS) in elderly patients. Methods: Chronic heart failure (CHF) patients age ≥ 65 years old, who hospitalized in the department of Cardiology of Hebei General Hospital from December 2017 to October 2019, were included in this study. According to the estimate glomerular filtration rate (eGFR) level, patients were divided into CRS group (eGFR<60 ml·min-1·1.73 m-2) and CHF group (eGFR ≥60 ml·min-1·1.73 m-2). The blood index and basic disease information were collected and compared. Left ventricular ejection fraction (LVEF) were measured by echocardiography. The correlation between clinical indicators and cardio-renal function (LVEF and eGFR) was assessed. The multivariate logistic regression analysis was used to evaluate the related risk factors of CRS in elderly patients; subgroup logistic regression analysis was performed according to the basic disease of patients to assess the relationship between Lp(a) and CRS. Results: A total of 172 elderly patients (85 males (49.4%), aged 79 (71, 84) years) were finally enrolled. Among them, 88 cases (51.2%) were in CRS group and 84 cases (48.8%) were in CHF group. Age (80 (74, 84) years old vs. 74 (70, 82) years old) and LP (a) levels (222.0 (112.0, 445.3) mg/L vs. 155.0 (97.0, 348.7) mg/L) were significantly higher in the CRS group than in the CHF group (P<0.05). Lp(a) levels were negatively correlated with LVEF (r=-0.155, P=0.043) and eGFR (r=-0.220, P=0.004) in total cohort. In the subgroup analysis of patients with 2 high-incidence basic diseases (coronary heart disease and hypertension), Lp(a) was negatively correlated with LVEF (r=-0.250, P=0.007) in the coronary heart disease group, and negatively correlated with eGFR (r=-0.233, P=0.013) in the hypertension group. Multivariate logistic regression analysis showed that age (OR = 1.069, 95%CI: 1.017-1.124, P= 0.009) and Lp(a) (OR = 3.719, 95%CI: 1.339-10.326, P = 0.012) were independent correlates of CRS. The results of logistic regression analysis showed that Lp(a) was an independent correlative factor of CRS in the subgroups of coronary heart disease (OR=3.207, 95%CI: 1.129-9.108, P=0.029) and hypertension (OR=3.054, 95%CI: 1.086-8.587, P=0.034). Conclusion: Serum Lp(a) level is independently related with CRS in elderly patients.
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Affiliation(s)
- Y Wang
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
| | - Q Y Wang
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
| | - C Guan
- Department of Cardiovascular Medicine, Hebei Medical University, Shijiazhuang 050000, China
| | - X Zhang
- Department of Geriatric Medicine, Northern College, Zhangjiakou 075000, China
| | - Y F Guo
- Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang 050051, China
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22
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Cao Q, Du J, Tang X, Xu X, Huang L, Cai D, Long X, Wang X, Ding J, Guan C, Huang W. Structure-Enhanced Mechanically Robust Graphite Foam with Ultrahigh MnO 2 Loading for Supercapacitors. Research (Wash D C) 2020; 2020:7304767. [PMID: 33274338 PMCID: PMC7676245 DOI: 10.34133/2020/7304767] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 10/19/2020] [Indexed: 01/09/2023]
Abstract
With the fast bloom of flexible electronics and green vehicles, it is vitally important to rationally design and facilely construct customized functional materials with excellent mechanical properties as well as high electrochemical performance. Herein, by utilizing two modern industrial techniques, digital light processing (DLP) and chemical vapor deposition (CVD), a unique 3D hollow graphite foam (HGF) is demonstrated, which shows a periodic porous structure and robust mechanical properties. Finite element analysis (FEA) results confirm that the properly designed gyroidal porous structure provides a uniform stress area and mitigates potential structural failure caused by stress concentrations. A typical HGF can show a high Young's modulus of 3.18 MPa at a low density of 48.2 mg cm-3. The porous HGF is further covered by active MnO2 material with a high mass loading of 28.2 mg cm-2 (141 mg cm-3), and the MnO2/HGF electrode still achieves a satisfactory specific capacitance of 260 F g-1, corresponding to a high areal capacitance of 7.35 F cm-2 and a high volumetric capacitance of 36.75 F cm-3. Furthermore, the assembled quasi-solid-state asymmetric supercapacitor also shows remarkable mechanical properties as well as electrochemical performance.
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Affiliation(s)
- Qinghe Cao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Junjie Du
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xiaowan Tang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xi Xu
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, Singapore 117576
| | - Longsheng Huang
- College of Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Dongming Cai
- College of Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Xu Long
- School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xuewen Wang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Jun Ding
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, Singapore 117576
| | - Cao Guan
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
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23
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Wang Y, Cao Q, Guan C, Cheng C. Recent Advances on Self-Supported Arrayed Bifunctional Oxygen Electrocatalysts for Flexible Solid-State Zn-Air Batteries. Small 2020; 16:e2002902. [PMID: 32639086 DOI: 10.1002/smll.202002902] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Flexible solid-state Zn-air batteries have been rapidly developed benefiting from the uprising demand for wearable electronic devices, wherein the air electrode integrated with efficient bifunctional oxygen electrocatalysts plays an important role to achieve high performance. Binder-free self-supported bifunctional catalysts can provide large active surface area, fast electron transport path, easy ion diffusion, and excellent structural stability and flexibility, thus acting as promising flexible air cathodes. In this review, recent advances on the application of nanoarrayed electrocatalysts as air cathodes in flexible Zn-air batteries are reviewed. Especially, various types of bifunctional oxygen electrocatalysts, including carbonaceous material arrays, transition metal compound arrays, transition metal/carbon arrays, transition metal compound/carbon arrays, and other hybrid arrays, are discussed. The applications of flexible Zn-air batteries with two configurations (i.e., planar stacks and cable fibers) are also introduced. Finally, perspectives on the optimization of arrayed air cathodes for future development to achieve high-performance flexible Zn-air batteries are shared.
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Affiliation(s)
- Yijie Wang
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Qinghe Cao
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Cao Guan
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, P. R. China
| | - Chuanwei Cheng
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
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Zhu C, Wang H, Guan C. Recent progress on hollow array architectures and their applications in electrochemical energy storage. Nanoscale Horiz 2020; 5:1188-1199. [PMID: 32661545 DOI: 10.1039/d0nh00332h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The structural design of electrode materials is one of the most important factors that determines the electrochemical performance of energy storage devices. In recent years, hollow micro-/nanoarray structures have been widely explored for energy applications due to their unique structural advantages. Their complex hollow interior and shell arrays enable fast ion diffusion/transport, provide abundant active sites and accommodate volume changes. Moreover, the direct contact of hollow arrays with substrates enhances the mechanical stability during long-term cycling. To date, huge progress has been achieved in the rational design of various hollow array architectures. However, a review on this topic has been rarely reported. Herein, the multifunctional merits and typical synthetic strategies for hollow array structures are analyzed in detail. Furthermore, their applications in electrochemical energy storage (such as supercapacitors and batteries) are summarized. The development and challenges of hollow arrays in terms of substrates, technique improvement and material innovation are discussed. Finally, their applications for energy storage and conversion are prospected.
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Affiliation(s)
- Chenyu Zhu
- Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710129, P. R. China.
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25
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Xu X, Guan C, Xu L, Tan YH, Zhang D, Wang Y, Zhang H, Blackwood DJ, Wang J, Li M, Ding J. Three Dimensionally Free-Formable Graphene Foam with Designed Structures for Energy and Environmental Applications. ACS Nano 2020; 14:937-947. [PMID: 31891478 DOI: 10.1021/acsnano.9b08191] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Three-dimensional assemblies of graphene have been considered as promising starting materials for many engineering, energy, and environmental applications due to its desirable mechanical properties, high specific area, and superior thermal and electrical transfer ability. However, little has been done to introduce designed shapes into scalable graphene assemblies. In this work, we show here a combination of conventional graphene growing technique-chemical vapor deposition with additive manufacturing. Such synthesis collaboration enables a hierarchically constructed porous 3D graphene foam with large surface area (994.2 m2/g), excellent conductivity (2.39 S/cm), reliable mechanical properties (E = 239.7 kPa), and tunable surface chemistry that can be used as a strain sensor, catalyst support, and solar steam generator.
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Affiliation(s)
- Xi Xu
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics , Northwestern Polytechnical University , Xi'an 710072 , China
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Cao Guan
- Institute of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics , Northwestern Polytechnical University , Xi'an 710072 , China
| | - Le Xu
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Yong Hao Tan
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
- NUS Graduate School for Integrative Sciences and Engineering , National University of Singapore , Singapore 119260 , Singapore
| | - Danwei Zhang
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Yanqing Wang
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Hong Zhang
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Daniel John Blackwood
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - John Wang
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Meng Li
- MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems, CQU-NUS Renewable Energy Materials & Devices Joint Laboratory, School of Energy & Power Engineering , Chongqing University , Chongqing 400044 , China
| | - Jun Ding
- Department of Materials Science and Engineering, Faculty of Engineering , National University of Singapore , Singapore 117575 , Singapore
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Chen F, Zhang L, Wu H, Guan C, Yang Y, Qiu J, Lyu P, Li M. Bifunctional oxygen evolution and supercapacitor electrode with integrated architecture of NiFe-layered double hydroxides and hierarchical carbon framework. Nanotechnology 2019; 30:325402. [PMID: 30965295 DOI: 10.1088/1361-6528/ab178c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Layered double hydroxide with exchangeable interlayer anions are considered promising electro-active materials for renewable energy technologies. However, the limited exposure of active sites and poor electrical conductivity of hydroxide powder restrict its application. Herein, bifunctional integrated electrode with a 3D hierarchical carbon framework decorated by nickel iron-layered double hydroxides (NiFe-LDH) is developed. A conductive carbon nanowire array is introduced not only to provide enough anchoring sites for the hydroxide, but also affords a continuous pathway for electron transport throughout the entire electrode. The 3D integrated architecture of NiFe-hydroxide and hierarchical carbon framework possesses several beneficial effects including large electrochemical active surfaces, fast electron/mass transport, and enhanced mechanical stability. The as-prepared electrode affords a current density of 10 mA cm-2 at a low overpotential of 269 mV for oxygen evolution reaction (OER) in 1 M of KOH. It also offers excellent stability with negligible current decline even after 2000 cycles. Besides, density functional theory calculations revealed that the (110) surface of NiFe-LDH is more active than the (003) surface for OER. Furthermore, the electrode possesses promising application prospects in alkaline battery-supercapacitor hybrid devices with a capacity of 178.8 mAh g-1 (capacitance of 1609.6 F g-1) at a current density of 0.2 A g-1. The viability of the as-prepared bifunctional electrode will provide a potential solution for wearable electronics in the near future.
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Affiliation(s)
- Fenggui Chen
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, 408100, People's Republic of China. MOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, CQU-NUS Renewable Energy Materials & Devices Joint Laboratory, School of Energy & Power Engineering, Chongqing University, Chongqing, 400044, People's Republic of China
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Liu X, Zhang L, Gao X, Guan C, Hu Y, Wang J. Enlarged Interlayer Spacing in Cobalt-Manganese Layered Double Hydroxide Guiding Transformation to Layered Structure for High Supercapacitance. ACS Appl Mater Interfaces 2019; 11:23236-23243. [PMID: 31252473 DOI: 10.1021/acsami.9b05564] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cobalt-manganese layered double hydroxide (CoMn-LDH) has been known as a highly desired cathode material used with an alkaline electrolyte. However, the layered double hydroxide structure is unstable and changes almost instantly in alkaline solution due to the instability of a manganese(III) ion. Thus, it is important to investigate the true active phase for designing efficient electrode materials. In this work, the metal-organic framework is used as a templating precursor to derive CoMn-LDH from three different manganese solutions, namely, MnSO4, Mn(NO3)2, and MnCl2. Anions in the solutions participate in the derivation process and strongly affect the layer structure, phase transformation process, and charge storage properties of the resulting materials. CoMn-LDH synthesized from manganese sulfate solution exhibits the largest interlayer spacing of 1.08 nm, and more interestingly, the layered structure can well be retained in KOH solution, while the other two synthesized from manganese chloride and nitrate solutions transform into the spinel structure. As a cathode material, it delivers a high areal capacity of 582.07 mC/cm2 at 2 mA/cm2, which is about 100% higher than those of the other two samples. The present work explores the active phase of CoMn-LDH in the alkaline electrolyte and proposes a potential mechanism of the phase transformation, which provides insights into understanding and designing of the active electrode materials for stable and high-performing supercapacitors in an alkaline environment.
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Affiliation(s)
- Ximeng Liu
- Department of Materials Science and Engineering , National University of Singapore , Singapore 117574
| | - Lei Zhang
- Department of Materials Science and Engineering , National University of Singapore , Singapore 117574
| | - Xiaorui Gao
- Department of Materials Science and Engineering , National University of Singapore , Singapore 117574
- Jiangsu Laboratory of Advanced Functional Materials, Department of Physics and Electronic Engineering , Changshu Institute of Technology , Changshu 215500 , China
| | - Cao Guan
- Institute of Flexible Electronics , Northwestern Polytechnical University , Xi'an 710072 , China
| | - Yating Hu
- Department of Materials Science and Engineering , National University of Singapore , Singapore 117574
| | - John Wang
- Department of Materials Science and Engineering , National University of Singapore , Singapore 117574
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Chen H, Shen Z, Pan Z, Kou Z, Liu X, Zhang H, Gu Q, Guan C, Wang J. Hierarchical Micro-Nano Sheet Arrays of Nickel-Cobalt Double Hydroxides for High-Rate Ni-Zn Batteries. Adv Sci (Weinh) 2019; 6:1802002. [PMID: 31016113 PMCID: PMC6468968 DOI: 10.1002/advs.201802002] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 12/04/2018] [Indexed: 05/19/2023]
Abstract
The rational design of nickel-based cathodes with highly ordered micro-nano hierarchical architectures by a facile process is fantastic but challenging to achieve for high-capacity and high-rate Ni-Zn batteries. Herein, a one-step etching-deposition-growth process is demonstrated to prepare hierarchical micro-nano sheet arrays for Ni-Zn batteries with outstanding performance and high rate. The fabrication process is conducted at room temperature without any need of heating and stirring, and the as-grown nickel-cobalt double hydroxide (NiCo-DH) supported on conductive nickel substrate is endowed with a unique 3D hierarchical architecture of micro-nano sheet arrays, which empower the effective exposure of active materials, easy electrolyte access, fast ion diffusion, and rapid electron transfer. Benefiting from these merits in combination, the NiCo-DH electrode delivers a high specific capacity of 303.6 mAh g-1 and outstanding rate performance (80% retention after 20-fold current increase), which outperforms the electrodes made of single Ni(OH)2 and Co(OH)2, and other similar materials. The NiCo-DH electrode, when employed as the cathode for a Ni-Zn battery, demonstrates a high specific capacity of 329 mAh g-1. Moreover, the NiCo-DH//Zn battery also exhibits high electrochemical energy conversion efficiency, excellent rate capability (62% retention after 30-fold current increase), ultrafast charge characteristics, and strong tolerance to the high-speed conversion reaction.
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Affiliation(s)
- Hao Chen
- School of EngineeringZhejiang A&F UniversityHangzhou311300P. R. China
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Zhehong Shen
- School of EngineeringZhejiang A&F UniversityHangzhou311300P. R. China
| | - Zhenghui Pan
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Zongkui Kou
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Ximeng Liu
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Hong Zhang
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Qilin Gu
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Cao Guan
- Institute of Flexible ElectronicsNorthwestern Polytechnical UniversityXi'an710072P. R. China
| | - John Wang
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
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29
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Yang C, Chen H, Guan C. Hybrid CoO Nanowires Coated with Uniform Polypyrrole Nanolayers for High-Performance Energy Storage Devices. Nanomaterials (Basel) 2019; 9:E586. [PMID: 30970649 PMCID: PMC6523395 DOI: 10.3390/nano9040586] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 01/31/2023]
Abstract
Transition metal oxides with high theoretic capacities are promising materials as battery-type electrodes for hybrid supercapacitors, but their practical applications are limited by their poor electric conductivity and unsatisfied rate capability. In this work, a hybrid structure of CoO nanowires coated with conformal polypyrrole (Ppy) nanolayer is proposed, designed and fabricated on a flexible carbon substrate through a facile two-step method. In the first step, porous CoO nanowires are fabricated on flexible carbon substrate through a hydrothermal procedure combined with an annealing process. In the second step, a uniform nanolayer of Ppy is further coated on the surfaces of the CoO nanowires, resulting in a hybrid core-shell CoO@Ppy nanoarrays. The CoO@Ppy aligned on carbon support can be directly utilized as electrode material for hybrid supercapacitors. Since the conductive Ppy coating layer provides enhanced electric conductivity, the hybrid electrode demonstrates much higher capacity and superior rate capability than pure CoO nanowires. As a further demonstration, Ppy layer can also be realized on SnO₂ nanowires. Such facile conductive-layer coating method can be also applied to other types of conducting polymers (as the shell) and metal oxide materials (as the core) for various energy-related applications.
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Affiliation(s)
- Chunhai Yang
- School of Chemistry & Environment Engineering, Hubei University for Nationalities, Enshi 445000, China.
| | - Hao Chen
- School of Engineering, Zhejiang A&F University, Hangzhou 311300, China.
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
| | - Cao Guan
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China.
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30
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Li X, Wu H, Guan C, Elshahawy AM, Dong Y, Pennycook SJ, Wang J. (Ni,Co)Se 2 /NiCo-LDH Core/Shell Structural Electrode with the Cactus-Like (Ni,Co)Se 2 Core for Asymmetric Supercapacitors. Small 2019; 15:e1803895. [PMID: 30556280 DOI: 10.1002/smll.201803895] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/02/2018] [Indexed: 05/26/2023]
Abstract
Supercapacitors (SCs) have been widely studied as a class of promising energy-storage systems for powering next-generation E-vehicles and wearable electronics. Fabricating hybrid-types of electrode materials and designing smart nanoarchitectures are effective approaches to developing high-performance SCs. Herein, first, a Ni-Co selenide material (Ni,Co)Se2 with special cactus-like structure as the core, to scaffold the NiCo-layered double hydroxides (LDHs) shell, is designed and fabricated. The cactus-like structural (Ni,Co)Se2 core, as a highly conductive and robust support, promotes the electron transport as well as hinders the agglomeration of LDHs. The synergistic contributions from the two types of active materials together with the superior properties of the cactus-like nanostructure enable the (Ni,Co)Se2 /NiCo-LDH hybrid electrode to exhibit a high capacity of ≈170 mA h g-1 (≈1224 F g-1 ), good rate performance, and long durability. The as-assembled (Ni,Co)Se2 /NiCo-LDH//PC (porous carbon) asymmetric supercapacitor (ASC) with an operating voltage of 1.65 V delivers a high energy density of 39 W h kg-1 at a power density of 1650 W kg-1 . Therefore, the cactus-like core/shell structure offers an effective pathway to engineer advanced electrodes. The assembled flexible ASC is demonstrated to effectively power electronic devices.
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Affiliation(s)
- Xin Li
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
- Center for Advanced 2D Materials, National University of Singapore, 117546, Singapore, Singapore
| | - Haijun Wu
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - Abdelnaby M Elshahawy
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - Yangtao Dong
- School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore, Singapore
| | - Stephen J Pennycook
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
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31
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Lou G, Wu Y, Zhu X, Lu Y, Yu S, Yang C, Chen H, Guan C, Li L, Shen Z. Facile Activation of Commercial Carbon Felt as a Low-Cost Free-Standing Electrode for Flexible Supercapacitors. ACS Appl Mater Interfaces 2018; 10:42503-42512. [PMID: 30433754 DOI: 10.1021/acsami.8b16881] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
High cost, low capacitance, and complicated synthesis process are still the key limitations for carbon-negative materials to meet their industrial production and application in high-energy-density asymmetric supercapacitors (ASCs). In this work, we demonstrate the facile preparation of ultrahigh-surface-area free-standing carbon material from low-cost industrial carbon felt (CF) and its application for flexible supercapacitor electrode with outstanding performance. Through a simple freeze-drying-assisted activation method, the as-prepared activated CF (ACF) was endowed with satisfactory flexibility, ultrahigh specific surface area of 2109 m2 g-1, good electric conductivity (311 S m-1), and excellent wettability to aqueous electrolyte. Owing to these merits, the ACF expressed an ultrahigh areal capacitance of 1441 mF cm-2, a high specific capacitance ( Cs) of 280 F g-1 based on the mass of the whole electrode, and an impressive cycling stability (87% retention after 5000 cycles). When applied as a flexible freestanding electrode for MnO2//ACF ASCs, the ACF-based device provided satisfactory areal energy densities of 0.283 and 0.104 mWh cm-2 in aqueous and quasi-solid electrolytes, respectively. The values outperform many previously reported carbon-based electrochemical devices. The low cost of raw material and the facile fabrication process, together with the high electrochemical performance, make our ACF electrode highly applicable for the mass production of flexible energy-storage devices.
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Affiliation(s)
- Gaobo Lou
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
| | - Yatao Wu
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
| | - Xinqiang Zhu
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
| | - Yingzhuo Lu
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
| | - Shuai Yu
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
| | - Chunhai Yang
- School of Chemistry & Environment Engineering , Hubei University for Nationalities , Enshi 445000 , P. R. China
| | - Hao Chen
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
- Department of Materials Science and Engineering , National University of Singapore , 117574 Singapore
| | - Cao Guan
- Institute of Flexible Electronics , Northwestern Polytechnical University , Xi'an 710072 , P. R. China
- Department of Materials Science and Engineering , National University of Singapore , 117574 Singapore
| | - Lu Li
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
| | - Zhehong Shen
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , P. R. China
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32
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Wu H, Zhao X, Guan C, Zhao LD, Wu J, Song D, Li C, Wang J, Loh KP, Venkatesan TV, Pennycook SJ. The Atomic Circus: Small Electron Beams Spotlight Advanced Materials Down to the Atomic Scale. Adv Mater 2018; 30:e1802402. [PMID: 30306651 DOI: 10.1002/adma.201802402] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 08/06/2018] [Indexed: 06/08/2023]
Abstract
Defects in crystalline materials have a tremendous impact on their functional behavior. Controlling and tuning of these imperfections can lead to marked improvements in their physical, electrical, magnetic, and optical properties. Thanks to the development of aberration-corrected (scanning) transmission electron microscopy (STEM/TEM), direct visualization of defects at multiple length scales has now become possible, including those critically important defects at the atomic scale. Thorough understanding of the nature and dynamics of these defects is the key to unraveling the fundamental origins of structure-property relationships. Such insight can therefore allow the creation of new materials with desired properties through appropriate defect engineering. Herein, several examples of new insights obtained from representative functional materials are shown, including piezoelectrics/ferroelectrics, oxide interfaces, thermoelectrics, electrocatalysts, and 2D materials.
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Affiliation(s)
- Haijun Wu
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore
| | - Xiaoxu Zhao
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 13 Centre for Life Sciences, #05-01, 28 Medical Drive, Singapore, 117456, Singapore
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore
| | - Li-Dong Zhao
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Jiagang Wu
- Department of Materials Science, Sichuan University, Chengdu, 610064, China
| | - Dongsheng Song
- NUSNNI-NanoCore, National University of Singapore, Singapore, 117411, Singapore
| | - Changjian Li
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore
| | - Kian Ping Loh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
- Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore
| | - Thirumalai V Venkatesan
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore
- NUSNNI-NanoCore, National University of Singapore, Singapore, 117411, Singapore
| | - Stephen J Pennycook
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 13 Centre for Life Sciences, #05-01, 28 Medical Drive, Singapore, 117456, Singapore
- Centre for Advanced 2D Materials (CA2DM), National University of Singapore, 6 Science Drive 2, Singapore, 117546, Singapore
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33
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Liu X, Guan C, Hu Y, Zhang L, Elshahawy AM, Wang J. 2D Metal-Organic Frameworks Derived Nanocarbon Arrays for Substrate Enhancement in Flexible Supercapacitors. Small 2018; 14:e1702641. [PMID: 29076649 DOI: 10.1002/smll.201702641] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 09/02/2017] [Indexed: 06/07/2023]
Abstract
Direct assembling of active materials on carbon cloth (CC) is a promising way to achieve flexible electrodes for energy storage. However, the overall surface area and electrical conductivity of such electrodes are usually limited. Herein, 2D metal-organic framework derived nanocarbon nanowall (MOFC) arrays are successfully developed on carbon cloth by a facile solution + carbonization process. Upon growth of the MOFC arrays, the sites for growth of the active materials are greatly increased, and the equivalent series resistance is decreased, which contribute to the enhancement of the bare CC substrate. After decorating ultrathin flakes of MnO2 and Bi2 O3 on the flexible CC/MOFC substrate, the hierarchical electrode materials show an abrupt improvement of areal capacitances by around 50% and 100%, respectively, compared to those of the active materials on pristine carbon cloth. A flexible supercapacitor can be further assembled using two hierarchical electrodes, which demonstrates an energy density of 124.8 µWh cm-2 at the power density of 2.55 mW cm-2 .
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Affiliation(s)
- Ximeng Liu
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - Yating Hu
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - Lei Zhang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - Abdelnaby M Elshahawy
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore, Singapore
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34
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Xu X, Gao X, Guan C, Hu J. Psychology of cross cultural communication: an impact on the health care system. J BIOL REG HOMEOS AG 2018; 32:1211-1214. [PMID: 30165732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cross culture communication has become an integral part of today's world, especially in developed countries with a large population of immigrants. The health care system is one of the important areas in which health care practitioners and patients may be of different cultures, therefore there is a need of effective communication between culturally different patients and health practitioners. However, cross-culture communication is affected by psychological factors related to cultures and mind-set. Acculturation orientation is one of the important factors, and people with different orientations interact differently with people of different cultures. Cultural orientation is another important factor is which different domains define the characteristic features of different cultures. Moreover, the inclination to use native or non-native language with culturally different patients is a key factor for establishing a good relationship between patients and health care practitioners.
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Affiliation(s)
- X Xu
- College of Foreign Studies, Hubei Normal University, Huangshi, Hubei, China
| | - X Gao
- College of Foreign Studies, Hubei Normal University, Huangshi, Hubei, China
| | - C Guan
- College of Foreign Studies, Hubei Normal University, Huangshi, Hubei, China
| | - J Hu
- College of Foreign Studies, Hubei Normal University, Huangshi, Hubei, China
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35
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Zang W, Sumboja A, Ma Y, Zhang H, Wu Y, Wu S, Wu H, Liu Z, Guan C, Wang J, Pennycook SJ. Single Co Atoms Anchored in Porous N-Doped Carbon for Efficient Zinc−Air Battery Cathodes. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02556] [Citation(s) in RCA: 280] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Wenjie Zang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
| | - Afriyanti Sumboja
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #8-13, Singapore 138634
- Material Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia
| | - Yuanyuan Ma
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #8-13, Singapore 138634
| | - Hong Zhang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
| | - Yue Wu
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
| | - Sisi Wu
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
| | - Haijun Wu
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
| | - Zhaolin Liu
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #8-13, Singapore 138634
| | - Cao Guan
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
| | - John Wang
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
| | - Stephen J. Pennycook
- Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, Singapore 117574
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36
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Lin S, Zheng Z, Zhang H, Rao C, Yan H, Wu Y, Tang Y, Dou K, Guan C, Sun Z, Xu L, Xia R, Xu B. P1647Real-time SYNTAX score feedback during coronary angiography to improve appropriateness of coronary revascularization for patients with stable coronary artery disease. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Lin
- Fu Wai Hospital, Beijing, China People's Republic of
| | - Z Zheng
- Fu Wai Hospital, Beijing, China People's Republic of
| | - H Zhang
- Fu Wai Hospital, Beijing, China People's Republic of
| | - C Rao
- Fu Wai Hospital, Beijing, China People's Republic of
| | - H Yan
- Fu Wai Hospital, Beijing, China People's Republic of
| | - Y Wu
- Fu Wai Hospital, Beijing, China People's Republic of
| | - Y Tang
- Fu Wai Hospital, Beijing, China People's Republic of
| | - K Dou
- Fu Wai Hospital, Beijing, China People's Republic of
| | - C Guan
- Fu Wai Hospital, Beijing, China People's Republic of
| | - Z Sun
- Fu Wai Hospital, Beijing, China People's Republic of
| | - L Xu
- Fu Wai Hospital, Beijing, China People's Republic of
| | - R Xia
- Fu Wai Hospital, Beijing, China People's Republic of
| | - B Xu
- Fu Wai Hospital, Beijing, China People's Republic of
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37
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Tang N, Guan C, Ang K, Phua K, Chew E. Motor imagery-assisted brain-computer interface for gait retraining in neurorehabilitation in chronic stroke. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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38
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Zhang Y, Chen H, Guan C, Wu Y, Yang C, Shen Z, Zou Q. Energy-Saving Synthesis of MOF-Derived Hierarchical and Hollow Co(VO 3) 2-Co(OH) 2 Composite Leaf Arrays for Supercapacitor Electrode Materials. ACS Appl Mater Interfaces 2018; 10:18440-18444. [PMID: 29790730 DOI: 10.1021/acsami.8b05501] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A one-step and energy-saving method was proposed to synthesize hierarchical and hollow Co(VO3)2-Co(OH)2 composite leaf arrays on carbon cloth, which expressed high capacitance (522 mF cm-2 or 803 F g-1 at the current density of 0.5 mA cm-2), good rate capability (79.5% capacitance retention after a 30-fold increase of the current density) and excellent cycling stability (90% capacitance retention after 15 000 charge-discharge cycles) when tested as a supercapacitor electrode.
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Affiliation(s)
- Yingxi Zhang
- College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , PR China
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , PR China
| | - Hao Chen
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , PR China
- Department of Materials Science and Engineering , National University of Singapore , 117574 Singapore
| | - Cao Guan
- Department of Materials Science and Engineering , National University of Singapore , 117574 Singapore
| | - Yatao Wu
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , PR China
| | - Chunhai Yang
- School of Chemistry & Environment Engineering , Hubei University for Nationalities , Enshi 445000 , PR China
| | - Zhehong Shen
- School of Engineering , Zhejiang A&F University , Hangzhou 311300 , PR China
| | - Qichao Zou
- College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , PR China
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39
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Chen T, Li S, Wen J, Gui P, Guo Y, Guan C, Liu J, Fang G. Rational Construction of Hollow Core-Branch CoSe 2 Nanoarrays for High-Performance Asymmetric Supercapacitor and Efficient Oxygen Evolution. Small 2018; 14:1700979. [PMID: 29251409 DOI: 10.1002/smll.201700979] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 10/22/2017] [Indexed: 06/07/2023]
Abstract
Metal selenides have great potential for electrochemical energy storage, but are relatively scarce investigated. Herein, a novel hollow core-branch CoSe2 nanoarray on carbon cloth is designed by a facile selenization reaction of predesigned CoO nanocones. And the electrochemical reaction mechanism of CoSe2 in supercapacitor is studied in detail for the first time. Compared with CoO, the hollow core-branch CoSe2 has both larger specific surface area and higher electrical conductivity. When tested as a supercapacitor positive electrode, the CoSe2 delivers a high specific capacitance of 759.5 F g-1 at 1 mA cm-2 , which is much larger than that of CoO nanocones (319.5 F g-1 ). In addition, the CoSe2 electrode exhibits excellent cycling stability in that a capacitance retention of 94.5% can be maintained after 5000 charge-discharge cycles at 5 mA cm-2 . An asymmetric supercapacitor using the CoSe2 as cathode and an N-doped carbon nanowall as anode is further assembled, which show a high energy density of 32.2 Wh kg-1 at a power density of 1914.7 W kg-1 , and maintains 24.9 Wh kg-1 when power density increased to 7354.8 W kg-1 . Moreover, the CoSe2 electrode also exhibits better oxygen evolution reaction activity than that of CoO.
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Affiliation(s)
- Tian Chen
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Songzhan Li
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Jian Wen
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Pengbin Gui
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Yaxiong Guo
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Jinping Liu
- School of Chemistry, Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Guojia Fang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
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40
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Zhang H, Liu X, Wu Y, Guan C, Cheetham AK, Wang J. MOF-derived nanohybrids for electrocatalysis and energy storage: current status and perspectives. Chem Commun (Camb) 2018; 54:5268-5288. [DOI: 10.1039/c8cc00789f] [Citation(s) in RCA: 191] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Metal–organic frameworks can be easily transformed to nanohybrids that are exceptionally good active materials for both electrocatalysis and energy storage. We review the latest developments in this area.
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Affiliation(s)
- Hong Zhang
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 117574
- Singapore
| | - Ximeng Liu
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 117574
- Singapore
| | - Yue Wu
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 117574
- Singapore
| | - Cao Guan
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 117574
- Singapore
| | - Anthony K. Cheetham
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 117574
- Singapore
| | - John Wang
- Department of Materials Science and Engineering
- National University of Singapore
- Singapore 117574
- Singapore
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41
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Guan C, Liu X, Elshahawy AM, Zhang H, Wu H, Pennycook SJ, Wang J. Metal-organic framework derived hollow CoS 2 nanotube arrays: an efficient bifunctional electrocatalyst for overall water splitting. Nanoscale Horiz 2017; 2:342-348. [PMID: 32260664 DOI: 10.1039/c7nh00079k] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Self-supported hollow nanoarrays with hierarchical pores and rich reaction sites are promising for advanced electrocatalysis. Herein, we report a rational design of novel CoS2 nanotube arrays assembled on a flexible support which can be directly utilized as an efficient bifunctional electrocatalyst for overall water splitting. Uniform wire-like metal-organic framework (MOF) nanoarrays were first fabricated and a sulfidation process by thermal treatment was carried out to transform the MOF arrays into CoS2 nanotube arrays. The unique hollow CoS2 tubular arrays are shown to provide high surface area for an efficient electrochemical reaction, and the well-defined electrical/mechanical connection to the substrate enhances both mass and electron transfer. The CoS2 nanotube arrays exhibited a high electrochemical activity in catalyzing both oxygen and hydrogen evolution reactions, in terms of low onset potential, high current density and excellent stability. Using the CoS2 nanotube arrays as catalysts, a water-splitting current density of 10 mA cm-2 in alkaline solution is achieved with a cell voltage of 1.67 V, and the stable current can be maintained for 20 h even when the electrode is in a bent state.
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Affiliation(s)
- Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore.
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42
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Guan C, Sumboja A, Wu H, Ren W, Liu X, Zhang H, Liu Z, Cheng C, Pennycook SJ, Wang J. Hollow Co 3 O 4 Nanosphere Embedded in Carbon Arrays for Stable and Flexible Solid-State Zinc-Air Batteries. Adv Mater 2017; 29:1704117. [PMID: 29024075 DOI: 10.1002/adma.201704117] [Citation(s) in RCA: 174] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 08/10/2017] [Indexed: 05/24/2023]
Abstract
Highly active and durable air cathodes to catalyze both the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are urgently required for rechargeable metal-air batteries. In this work, an efficient bifunctional oxygen catalyst comprising hollow Co3 O4 nanospheres embedded in nitrogen-doped carbon nanowall arrays on flexible carbon cloth (NC-Co3 O4 /CC) is reported. The hierarchical structure is facilely derived from a metal-organic framework precursor. A carbon onion coating constrains the Kirkendall effect to promote the conversion of the Co nanoparticles into irregular hollow oxide nanospheres with a fine scale nanograin structure, which enables promising catalytic properties toward both OER and ORR. The integrated NC-Co3 O4 /CC can be used as an additive-free air cathode for flexible all-solid-state zinc-air batteries, which present high open circuit potential (1.44 V), high capacity (387.2 mAh g-1 , based on the total mass of Zn and catalysts), excellent cycling stability and mechanical flexibility, significantly outperforming Pt- and Ir-based zinc-air batteries.
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Affiliation(s)
- Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Afriyanti Sumboja
- Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore
| | - Haijun Wu
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Weina Ren
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Ximeng Liu
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Hong Zhang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Zhaolin Liu
- Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis #08-03, 138634, Singapore
| | - Chuanwei Cheng
- Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
- The Institute of Dongguan - Tongji University, Dongguan, Guangdong, 523808, P. R. China
| | - Stephen J Pennycook
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
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43
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Li X, Elshahawy AM, Guan C, Wang J. Metal Phosphides and Phosphates-based Electrodes for Electrochemical Supercapacitors. Small 2017; 13:1701530. [PMID: 28834280 DOI: 10.1002/smll.201701530] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/10/2017] [Indexed: 05/26/2023]
Abstract
Phosphorus compounds, such as metal phosphides and phosphates have shown excellent performances and great potential in electrochemical energy storage, which are demonstrated by research works published in recent years. Some of these metal phosphides and phosphates and their hybrids compare favorably with transition metal oxides/hydroxides, which have been studied extensively as a class of electrode materials for supercapacitor applications, where they have limitations in terms of electrical and ion conductivity and device stability. To be specific, metal phosphides have both metalloid characteristics and good electric conductivity. For metal phosphates, the open-framework structures with large channels and cavities endow them with good ion conductivity and charge storage capacity. In this review, we present the recent progress on metal phosphides and phosphates, by focusing on their advantages/disadvantages and potential applications as a new class of electrode materials in supercapacitors. The synthesis methods to prepare these metal phosphides/phosphates are looked into, together with the scientific insights involved, as they strongly affect the electrochemical energy storage performance. Particular attentions are paid to those hybrid-type materials, where strong synergistic effects exist. In the summary, the future perspectives and challenges for the metal phosphides, phosphates and hybrid-types are proposed and discussed.
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Affiliation(s)
- Xin Li
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 117546, Singapore
| | - Abdelnaby M Elshahawy
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
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Li X, Guan C, Hu Y, Wang J. Nanoflakes of Ni-Co LDH and Bi 2O 3 Assembled in 3D Carbon Fiber Network for High-Performance Aqueous Rechargeable Ni/Bi Battery. ACS Appl Mater Interfaces 2017; 9:26008-26015. [PMID: 28722397 DOI: 10.1021/acsami.7b06696] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
For aqueous nickel/metal batteries, low energy density and poor rate properties are among the limiting factors for their applications, although they are the energy storage systems with high safety, high capacity, and low production cost. Here, we have developed a class of active materials consisting of porous nanoflakes of Ni-Co hydroxides and Bi2O3 that are successfully assembled on carbon substrates of carbon cloth/carbon nanofiber 3D network (CC/CNF). The combination of the porous Ni-Co hydroxides/Bi2O3 nanoflakes with carbon substrate of 3D network is able to provide a large surface area, excellent conductivity, and promote synergistic effects, as a result of the interaction between the active materials and the carbon matrix. With the porous Ni-Co hydroxides and Bi2O3 nanoflakes, the Ni/Bi battery can deliver a high capacity of ∼110 mA h g-1 at a current density of 2 A g-1. About 80% of its capacity (85 mA h g-1) can be retained when the current density increases to 20 A g-1. The full cell can also maintain 93% of the initial capacity after 1000 charge/discharge cycles, showing great potential for Ni/Bi battery.
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Affiliation(s)
- Xin Li
- Department of Materials Science and Engineering, National University of Singapore , 117574 Singapore
- Centre for Advanced 2D Materials, National University of Singapore , 117546 Singapore
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore , 117574 Singapore
| | - Yating Hu
- Department of Materials Science and Engineering, National University of Singapore , 117574 Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore , 117574 Singapore
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45
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Lin S, Zheng Z, Rao C, Xu B, Yan H, Wu Y, Dou K, Tang Y, Wu F, Guan C. P877The accuracy of subjective SYNTAX score category assessment and its influence on appropriateness of coronary revascularization in patients with stable coronary artery diseases. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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46
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Wang W, Guan C, Zhou C, Peng Y, Pratt LM, Chen X, Chen L, Chen Z, Yuan X, Xiao S. Integrated carbon, sulfur, and nitrogen isotope chemostratigraphy of the Ediacaran Lantian Formation in South China: Spatial gradient, ocean redox oscillation, and fossil distribution. Geobiology 2017; 15:552-571. [PMID: 28063179 DOI: 10.1111/gbi.12226] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 12/07/2016] [Indexed: 06/06/2023]
Abstract
The Ediacaran Doushantuo Formation in South China is a prime target for geobiological investigation because it offers opportunities to integrate chemostratigraphic and paleobiological data. Previous studies were mostly focused on successions in shallow-water shelf facies, but data from deep-water successions are needed to fully understand basinal redox structures. Here, we report δ13 Ccarb , δ13 Corg , δ34 Spyr , δ34 SCAS , and δ15 Nsed data from a drill core of the fossiliferous Lantian Formation, which is a deep-water equivalent of the Doushantuo Formation. Our data confirm a large (>10‰) spatial gradient in δ13 Ccarb in the lower Doushantuo/Lantian formations, but this gradient is probably due to the greater sensitivity of carbonate-poor deep-water sediments to isotopic mixing with 13 C-depleted carbonate cements. A pronounced negative δ13 Ccarb excursion (EN3) in the upper Doushantuo/Lantian formations, however, is spatially consistent and may be an equivalent of the Shuram excursion. δ34 Spyr is more negative in deeper-water facies than in shallow-water facies, particularly in the lower Doushantuo/Lantian formations, and this spatial pattern is interpreted as evidence for ocean redox stratification: Pyrite precipitated in euxinic deep waters has lower δ34 Spyr than that formed within shallow-water sediments. The Lantian Formation was probably deposited in oscillating oxic and euxinic conditions. Euxinic black shales have higher TOC and TN contents, but lower δ34 Spyr and δ15 Nsed values. In euxinic environments, pyrite was predominantly formed in the water column and organic nitrogen was predominantly derived from nitrogen fixation or NH4+ assimilation because of quantitative denitrification, resulting in lower δ34 Spyr and δ15 Nsed values. Benthic macroalgae and putative animals occur exclusively in euxinic black shales. If preserved in situ, these organisms must have lived in brief oxic episodes punctuating largely euxinic intervals, only to be decimated and preserved when the local environment switched back to euxinia again. Thus, taphonomy and ecology were the primary factors controlling the stratigraphic distribution of macrofossils in the Lantian Formation.
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Affiliation(s)
- W Wang
- Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
- Department of Geosciences, Virginia Tech, Blacksburg, VA, USA
| | - C Guan
- Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
| | - C Zhou
- Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
| | - Y Peng
- Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA, USA
| | - L M Pratt
- Department of Geological Sciences, Indiana University, Bloomington, IN, USA
| | - X Chen
- State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
| | - L Chen
- College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China
| | - Z Chen
- State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
| | - X Yuan
- State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
| | - S Xiao
- Department of Geosciences, Virginia Tech, Blacksburg, VA, USA
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Guan C, Zhao W, Hu Y, Lai Z, Li X, Sun S, Zhang H, Cheetham AK, Wang J. Cobalt oxide and N-doped carbon nanosheets derived from a single two-dimensional metal-organic framework precursor and their application in flexible asymmetric supercapacitors. Nanoscale Horiz 2017; 2:99-105. [PMID: 32260671 DOI: 10.1039/c6nh00224b] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Based on a new "one for two" strategy, a single two-dimensional (2D) metal-organic framework (MOF) precursor has been transformed into both electrodes (i.e., a Co3O4 cathode and a N-doped carbon anode) for a flexible asymmetric supercapacitor. The device demonstrated not only highly robust mechanical flexibility but also outstanding electrochemical performance. The "one for two" concept can significantly ease the fabrication process and has great potential to be extended to other functional materials for different applications.
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Affiliation(s)
- Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574 Singapore.
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48
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Ke Q, Guan C, Zhang X, Zheng M, Zhang YW, Cai Y, Zhang H, Wang J. Surface-Charge-Mediated Formation of H-TiO 2 @Ni(OH) 2 Heterostructures for High-Performance Supercapacitors. Adv Mater 2017; 29:1604164. [PMID: 27885732 DOI: 10.1002/adma.201604164] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/19/2016] [Indexed: 05/24/2023]
Abstract
An electrochemically favorable Ni(OH)2 with porously hierarchical structure and ultrathin nanosheets in a core-shell structure H-TiO2 @Ni(OH)2 is achieved through modulating the surface chemical activity of TiO2 by hydrogenation, which creates a defect-rich surface of TiO2 , thereby facilitating the subsequent nucleation and growth of Ni(OH)2 . These configuration-tailored H-TiO2 @Ni(OH)2 core-shell nanowires exhibit a superior electrochemical performance and good flexibility.
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Affiliation(s)
- Qingqing Ke
- Institute of Materials Research and Engineering, A*STAR, 138634, Singapore
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Xiao Zhang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Minrui Zheng
- Department of Electrical and Computer Engineering, National University of Singapore, 2 Engineering Drive 3, 117581, Singapore
| | - Yong-Wei Zhang
- Institute of High Performance Computing, A*STAR, 138732, Singapore
| | - Yongqing Cai
- Institute of High Performance Computing, A*STAR, 138732, Singapore
| | - Hua Zhang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
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49
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Chen JS, Guan C, Gui Y, Blackwood DJ. Rational Design of Self-Supported Ni 3S 2 Nanosheets Array for Advanced Asymmetric Supercapacitor with a Superior Energy Density. ACS Appl Mater Interfaces 2017; 9:496-504. [PMID: 27976843 DOI: 10.1021/acsami.6b14746] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report a rationally designed two-step method to fabricate self-supported Ni3S2 nanosheet arrays. We first used 2-methylimidazole (2-MI), an organic molecule commonly served as organic linkers in metal-organic frameworks (MOFs), to synthesize an α-Ni(OH)2 nanosheet array as a precursor, followed by its hydrothermal sulfidization into Ni3S2. The resulting Ni3S2 nanosheet array demonstrated superior supercapacitance properties, with a very high capacitance of about 1,000 F g-1 being delivered at a high current density of 50 A g-1 for 20,000 charge-discharge cycles. This performance is unparalleled by other reported nickel sulfide-based supercapacitors and is also advantageous compared to other nickel-based materials such as NiO and Ni(OH)2. An asymmetric supercapacitor was then established, exhibiting a very stable capacitance of about 200 F g-1 at a high current density of 10 A g-1 for 10,000 cycles and a surprisingly high energy density of 202 W h kg-1. This value is comparable to that of the lithium-ion batteries, i.e., 180 W h kg-1. The potential of the material for practical applications was evaluated by building a quasi-solid-state asymmetric supercapacitor which showed good flexibility and power output, and two of these devices connected in series were able to power up 18 green light-emitting diodes.
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Affiliation(s)
- Jun Song Chen
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of People's Republic of China , 610054 Chengdu, People's Republic of China
- Department of Materials Science and Engineering, National University of Singapore , Singapore 117574
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore , Singapore 117574
| | - Yang Gui
- Department of Materials Science and Engineering, National University of Singapore , Singapore 117574
| | - Daniel John Blackwood
- Department of Materials Science and Engineering, National University of Singapore , Singapore 117574
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50
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Liu J, Guan C, Zhou C, Fan Z, Ke Q, Zhang G, Liu C, Wang J. A Flexible Quasi-Solid-State Nickel-Zinc Battery with High Energy and Power Densities Based on 3D Electrode Design. Adv Mater 2016; 28:8732-8739. [PMID: 27562134 DOI: 10.1002/adma.201603038] [Citation(s) in RCA: 175] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/14/2016] [Indexed: 05/25/2023]
Abstract
A flexible quasi-solid-state Ni-Zn battery is developed by using tiny ZnO nanoparticles and porous ultrathin NiO nanoflakes conformally deposited on hierar chical carbon-cloth-carbon-fiber (CC-CF) as the anode (CC-CF@ZnO) and cathode (CC-CF@NiO), respectively. The device is able to deliver high performance (absence of Zn dendrite), superior to previous reports on aqueous Ni-Zn batteries and other flexible electrochemical energy-storage devices.
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Affiliation(s)
- Jinping Liu
- School of Chemistry, Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China.
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore.
| | - Cheng Zhou
- School of Chemistry, Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Zhen Fan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Qingqing Ke
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Guozhen Zhang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Chang Liu
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
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