1
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Wang H, Li N, Sun J, Wang P. Nitrogen-Doped CoP with optimized d-Band center as bidirectional electrocatalyst for high areal capacity of Li-S battery. J Colloid Interface Sci 2024; 665:702-710. [PMID: 38552585 DOI: 10.1016/j.jcis.2024.03.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 03/11/2024] [Accepted: 03/25/2024] [Indexed: 04/17/2024]
Abstract
Lithium polysulfide (LiPSs) shuttle effect and difficulties with Li2S oxidation are hinder the marketization of lithium-sulfur batteries. We suggest using a bidirectional catalyst in the sulfur host to solve these problems. We produced a nitrogen-doped cobalt phosphide (N-CoP@NC) as a sulfur carrier in this work. The introduction of nitrogen into cobalt phosphide enhances the electron transmission speed and forms shorter Co-N bonds. As a result, new defect energy levels are introduced, leading to an increase in the charge number of Co central atoms, which abate the Li-S and SS bonds in Li2S and Li2S4, thereby promoting the oxidation of Li2S during charging, as well as the alteration process of LiPSs during charge and discharge. Additionally, the crystal flaws that result in increased Co-S bond formation help to boost polysulfides' adsorption ability. The Li-S batteries shows outstanding cyclability when paired with this electrocatalyst, demonstrating a minimal capacity degradation rate of only 0.07 % per cycle over 500 cycles at a rate of 0.5C. As a result, incorporating anion doping in the host emerges as a promising method for crafting materials tailored for Li-S batteries.
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Affiliation(s)
- Haopeng Wang
- Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China
| | - Na Li
- Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China.
| | - Jinfeng Sun
- Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China
| | - Peng Wang
- Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China.
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2
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Chen M, Hu L, Xu L, Wei J, Wu P, Guan G, Wang T, Ma Y. Synergistically Tuning Surface States of Hierarchical MoC by Pt-N Dual-Doping Engineering for Optimizing Hydrogen Evolution Activity. SMALL METHODS 2023; 7:e2300308. [PMID: 37154229 DOI: 10.1002/smtd.202300308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/21/2023] [Indexed: 05/10/2023]
Abstract
Catalytic performance can be greatly enhanced by rational modulation of the surface state. In this study, reasonable adjustment of the surface states around the Fermi level (EF ) of molybdenum carbide (MoC) (α phase) via a Pt-N dual-doping process to fabricate an electrocatalyst named as Pt-N-MoC is performed to promote hydrogen evolution reaction (HER) performance over the MoC surface. Systematically experimental and theoretical analyses demonstrate that the synergistic tuning of Pt and N can cause the delocalization of surface states, with an increase in the density of surface states near the EF . This is beneficial for accumulating and transferring electrons between the catalyst surface and adsorbent, resulting in a positively linear correlation between the density of surface states near the EF and the HER activity. Moreover, the catalytic performance is further enhanced by artificially fabricating a Pt-N-MoC catalyst that has a unique hierarchical structure composed of MoC nanoparticles (0D), nanosheets (2D), and microrods (3D). As expected, the obtained Pt-N-MoC electrocatalyst exhibits superb HER activity with an extremely low overpotential of 39 mV@10 mA cm-2 as well as superb stability (over 24 d) in an alkaline solution. This work highlights a novel strategy to develop efficient electrocatalysts via adjusting their surface states.
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Affiliation(s)
- Meng Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, 036-8561, Japan
| | - Lihua Hu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Li Xu
- Novel Energy Materials & Catalysis Research Center, Shanwei Institute of Technology, Shanwei, 516600, China
| | - Junling Wei
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Ping Wu
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Guoqing Guan
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, 036-8561, Japan
- Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, Hirosaki, 036-8561, Japan
| | - Tiejun Wang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yufei Ma
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, 050024, China
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3
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Li Z, Li B, Yu C, Wang H, Li Q. Recent Progress of Hollow Carbon Nanocages: General Design Fundamentals and Diversified Electrochemical Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206605. [PMID: 36587986 PMCID: PMC9982577 DOI: 10.1002/advs.202206605] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/07/2022] [Indexed: 05/23/2023]
Abstract
Hollow carbon nanocages (HCNCs) consisting of sp2 carbon shells featured by a hollow interior cavity with defective microchannels (or customized mesopores) across the carbon shells, high specific surface area, and tunable electronic structure, are quilt different from the other nanocarbons such as carbon nanotubes and graphene. These structural and morphological characteristics make HCNCs a new platform for advanced electrochemical energy storage and conversion. This review focuses on the controllable preparation, structural regulation, and modification of HCNCs, as well as their electrochemical functions and applications as energy storage materials and electrocatalytic conversion materials. The metal single atoms-functionalized structures and electrochemical properties of HCNCs are summarized systematically and deeply. The research challenges and trends are also envisaged for deepening and extending the study and application of this hollow carbon material. The development of multifunctional carbon-based composite nanocages provides a new idea and method for improving the energy density, power density, and volume performance of electrochemical energy storage and conversion devices.
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Affiliation(s)
- Zesheng Li
- College of ChemistryGuangdong University of Petrochemical TechnologyMaoming525000China
| | - Bolin Li
- College of ChemistryGuangdong University of Petrochemical TechnologyMaoming525000China
| | - Changlin Yu
- College of ChemistryGuangdong University of Petrochemical TechnologyMaoming525000China
| | - Hongqiang Wang
- Guangxi Key Laboratory of Low Carbon Energy MaterialsGuangxi Normal UniversityGuilin541004China
| | - Qingyu Li
- Guangxi Key Laboratory of Low Carbon Energy MaterialsGuangxi Normal UniversityGuilin541004China
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4
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Li H, Shi P, Wang L, Yan T, Guo T, Xia X, Chen C, Mao J, Sun D, Zhang L. Cooperative Catalysis of Polysulfides in Lithium-Sulfur Batteries through Adsorption Competition by Tuning Cationic Geometric Configuration of Dual-active Sites in Spinel Oxides. Angew Chem Int Ed Engl 2023; 62:e202216286. [PMID: 36546717 DOI: 10.1002/anie.202216286] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/13/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
Fundamentally understanding the structure-property relationship is critical to design advanced electrocatalysts for lithium-sulfur (Li-S) batteries, which remains a formidable challenge. Herein, by manipulating the regulable cations in spinel oxides, their geometrical-site-dependent catalytic activity for sulfur redox is investigated. Experimental and theoretical analyses validate that the modulation essence of cooperative catalysis of lithium polysulfides (LiPSs) is dominated by LiPSs adsorption competition between Co3+ tetrahedral (Td) and Mn3+ octahedral (Oh) sites on Mn3+ Oh -O-Co3+ Td backbones. Specifically, high-spin Co3+ Td with stronger Co-S covalency anchors LiPSs persistently, while electron delocalized Mn3+ Oh with adsorptive orbital (dz 2 ) functions better in catalyzing specialized LiPSs conversion. This work inaugurates a universal strategy for sculpting geometrical configuration to achieve charge, spin, and orbital topological regulation in electrocatalysts for Li-S batteries.
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Affiliation(s)
- Hongtai Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Pei Shi
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.,Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Lei Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Tianran Yan
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Tong Guo
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Xiao Xia
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
| | - Chi Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.,Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Jing Mao
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Dan Sun
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.,Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Liang Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China.,Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, China
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Wang Y, Zhao J, Wu F, Wei S, Cao S, Yang Y, Li J. An ordered conductive Ni-CAT nanorods array as all-round polysulfide regulator for lithium-sulfur batteries. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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6
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Ouyang Y, Zong W, Zhu X, Mo L, Chao G, Fan W, Lai F, Miao Y, Liu T, Yu Y. A Universal Spinning-Coordinating Strategy to Construct Continuous Metal-Nitrogen-Carbon Heterointerface with Boosted Lithium Polysulfides Immobilization for 3D-Printed LiS Batteries. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2203181. [PMID: 35863908 PMCID: PMC9475505 DOI: 10.1002/advs.202203181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/28/2022] [Indexed: 05/07/2023]
Abstract
Constructing intimate coupling between transition metal and carbon nanomaterials is an effective means to achieve strong immobilization of lithium polysulfides (LiPSs) in the applications of lithium-sulfur (LiS) batteries. Herein, a universal spinning-coordinating strategy of constructing continuous metal-nitrogen-carbon (MNC, M = Co, Fe, Ni) heterointerface is reported to covalently bond metal nanoparticles with nitrogen-doped porous carbon fibers (denoted as M/MN@NPCF). Guided by theoretical simulations, the Co/CoN@NPCF hybrid is synthesized as a proof of concept and used as an efficient sulfur host material. The polarized CoNC bridging bonds can induce rapid electron transfer from Co nanoparticles to the NPCF skeleton, promoting the chemical anchoring of LiPSs to improve sulfur utilization. Hence, the as-assembled LiS battery presents a remarkable capacity of 781 mAh g-1 at 2.0 C and a prominent cycling lifespan with a low decay rate of only 0.032% per cycle. Additionally, a well-designed Co/CoN@NPCF-S electrode with a high sulfur loading of 7.1 mg cm-2 is further achieved by 3D printing technique, which demonstrates an excellent areal capacity of 6.4 mAh cm-2 at 0.2 C under a lean-electrolyte condition. The acquired insights into strongly coupled continuous heterointerface in this work pave the way for rational designs of host materials in LiS systems.
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Affiliation(s)
- Yue Ouyang
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai201620P. R. China
| | - Wei Zong
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai201620P. R. China
| | - Xiaobo Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai201620P. R. China
| | - Lulu Mo
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai201620P. R. China
| | - Guojie Chao
- The Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi, Jiangsu214122P. R. China
| | - Wei Fan
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai201620P. R. China
| | - Feili Lai
- Department of ChemistryKU LeuvenCelestijnenlaan 200FLeuven3001Belgium
| | - Yue‐E Miao
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai201620P. R. China
| | - Tianxi Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai201620P. R. China
- The Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi, Jiangsu214122P. R. China
| | - Yan Yu
- Hefei National Research Center for Physical Sciences at the MicroscaleDepartment of Materials Science and EngineeringNational Synchrotron Radiation LaboratoryCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefeiAnhui230026P. R. China
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7
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Catalytic Mo2C decorated hollow mesoporous carbon spheres as sulfur host for lithium-sulfur batteries with high sulfur loading. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Kang J, Tian X, Yan C, Wei L, Gao L, Ju J, Zhao Y, Deng N, Cheng B, Kang W. Customized Structure Design and Functional Mechanism Analysis of Carbon Spheres for Advanced Lithium-Sulfur Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104469. [PMID: 35015928 DOI: 10.1002/smll.202104469] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/16/2021] [Indexed: 06/14/2023]
Abstract
Lithium-sulfur batteries (LSBs) are attracting much attention due to their high theoretical energy density and are considered to be the predominant competitors for next-generation energy storage systems. The practical commercial application of LSBs is mainly hindered by the severe "shuttle effect" of the lithium polysulfides (LiPSs) and the serious damage of lithium dendrites. Various carbon materials with different characteristics have played an important role in overcoming the above-mentioned problems. Carbon spheres (CSs) are extensively explored to enhance the performance of LSBs owing to their superior structures. The review presents the state-of-the-art advances of CSs for advanced high-energy LSBs, including their preparation strategies and applications in inhibiting the "shuttle effect" of the LiPSs and protecting lithium anodes. The unique restriction effect of CSs on LiPSs is explained from three working mechanisms: physical confinement, chemical interaction, and catalytic conversion. From the perspective of interfacial engineering and 3D structure designing, the protective effect of CSs on the lithium anode is also analyzed. Not only does this review article contain a summary of CSs in LSBs, but also future directions and prospects are discussed. The systematic discussions and suggested directions can enlighten thoughts in the reasonable design of CSs for LSBs in near future.
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Affiliation(s)
- Junbao Kang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Xiaohui Tian
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Chenzheng Yan
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Liying Wei
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Lu Gao
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Jingge Ju
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Yixia Zhao
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Nanping Deng
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
- School of Material Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Bowen Cheng
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
- School of Material Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
| | - Weimin Kang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin, 300387, P. R. China
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Wang P, Song Y, Xu Z, Li N, Sun J, Hong B, Lai Y. Hierarchical MoxC @ NC Hollow Microsphere with Incorporated Mo Vacancies as Multifunctional Confined Reactors for High-loading Li-S Batteries. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01649k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The undesirable notorious shuttling of lithium polysulfides (LiPSs) and sluggish redox kinetic lead to the serious cycle life and reduce the sulfur utilization. Herein, to tackle these problems simultaneously, a...
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10
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Weng W, Xiao J, Shen Y, Liang X, Lv T, Xiao W. Molten Salt Electrochemical Modulation of Iron–Carbon–Nitrogen for Lithium–Sulfur Batteries. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111707] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wei Weng
- College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University Wuhan 430072 P. R. China
| | - Juanxiu Xiao
- State Key Laboratory of Marine Resource Utilization in, South China Sea Hainan University No. 58, Renmin Avenue Haikou Hainan 570228 P. R. China
| | - Yijun Shen
- State Key Laboratory of Marine Resource Utilization in, South China Sea Hainan University No. 58, Renmin Avenue Haikou Hainan 570228 P. R. China
| | - Xinxin Liang
- College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University Wuhan 430072 P. R. China
| | - Teng Lv
- College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University Wuhan 430072 P. R. China
| | - Wei Xiao
- College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University Wuhan 430072 P. R. China
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11
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Weng W, Xiao J, Shen Y, Liang X, Lv T, Xiao W. Molten Salt Electrochemical Modulation of Iron-Carbon-Nitrogen for Lithium-Sulfur Batteries. Angew Chem Int Ed Engl 2021; 60:24905-24909. [PMID: 34523222 DOI: 10.1002/anie.202111707] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Indexed: 11/08/2022]
Abstract
Sulfur hosts with rationally designed chemistry to confine and convert lithium polysulfides are of prime importance for high-performance lithium-sulfur batteries. A molten salt electrochemical modulation of iron-carbon-nitrogen is herein demonstrated as formation of hollow nitrogen-doped carbon with grafted Fe3 C nanoparticles (Fe3 C@C@Fe3 C), which is rationalized as an excellent sulfur host for lithium-sulfur batteries. Fe3 C over nitrogen-doped carbon contributes to enhanced adsorption and catalytic conversion of lithium polysulfides. The sulfur-loaded Fe3 C@C@Fe3 C electrodes hence show a high capacity, good cyclic stability, and enhanced rate performance. This work highlights the unique chemistry of metal carbides on facilitating adsorption-conversion process of lithium polysulfides, and also extends the scope of molten salt electrolysis to elaboration of energy materials.
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Affiliation(s)
- Wei Weng
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, P. R. China
| | - Juanxiu Xiao
- State Key Laboratory of Marine Resource Utilization in, South China Sea, Hainan University, No. 58, Renmin Avenue, Haikou, Hainan, 570228, P. R. China
| | - Yijun Shen
- State Key Laboratory of Marine Resource Utilization in, South China Sea, Hainan University, No. 58, Renmin Avenue, Haikou, Hainan, 570228, P. R. China
| | - Xinxin Liang
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, P. R. China
| | - Teng Lv
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, P. R. China
| | - Wei Xiao
- College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, P. R. China
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