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Zhao L, Ni Z, Ge B, Jin C, Zhao H, Li W. Hierarchical manganese valence gradient MnO 2via phosphorus doping for cathode materials with improved stability. Phys Chem Chem Phys 2023; 25:3766-3771. [PMID: 36644908 DOI: 10.1039/d2cp04210j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The search for a method for enhancing the electrochemical performance of manganese dioxide is still a challenge. Herein, we report a rod-like P-MnOx cathode material with a hierarchical manganese gradient valence through the phosphatization process. For the incorporation of P, Mn3O4 was formed on the surface of MnO2 and exhibited a gradient valence structure, while the oxygen defect concentration in P-MnOx increased. The unique structure was verified via XRD, TEM and XPS. As the cathode material for a supercapacitor, the specific capacitance of P-MnOx was 126.3 F g-1, which was four times that of MnO2. The assembling of the coin cells of aqueous ZIBs with P-MnOx also showed good rate performance. The electrochemical performance of the synthesised P-MnOx cathode was enhanced for the synergistic effect of improved conductivity and structural stability.
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Affiliation(s)
- Limin Zhao
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, P. R. China.
| | - Zejuan Ni
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, P. R. China.
| | - Bo Ge
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, P. R. China.
| | - Chuanyu Jin
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, P. R. China.
| | - Hui Zhao
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, P. R. China.
| | - Wenzhi Li
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, P. R. China.
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2
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Wu S, Xu X, Yan X, Zhao H, Liu C, Wang Y, Su Q, Yin F, Yang Q. Sea urchin-like CoNi 2S 4materials derived from nickel hexamyanocobaltate for high-performance asymmetric hybrid supercapacitor. NANOTECHNOLOGY 2022; 33:485404. [PMID: 35803093 DOI: 10.1088/1361-6528/ac7fa6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
In this work, a mild chemical precipitation method and simple hydrothermal treatment of the nickel hexamyanocobaltate precursor strategy are developed to prepare a sea urchin-like CoNi2S4compound with remarkable specific capacity and excellent cycling stability. The prepared CoNi2S4has an outstanding specific capacity of 149.1 mA h g-1at 1 A g-1and an initial capacity of 83.1% after 3000 cycles at 10 A g-1. Moreover, the porous carbon nanospheres (PCNs) with exhibit cycling stability (94.7% of initial specific capacity after 10 000 cycles at 10 A g-1) are selected as negative electrode to match CoNi2S4positive electrode for assembly of CoNi2S4//PCNs asymmetric supercapacitor (ASC). Satisfactorily, the as-assembled CoNi2S4//PCNs ASC exhibits an impressive energy density of 41.6 Wh kg-1at 797 W kg-1, as well as the suitable capacity retention of 82.8% after 10 000 cycles. The superior properties of the device demonstrated that the as-prepared material is potential energy storage material.
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Affiliation(s)
- Shang Wu
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Xin Xu
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Xiangtao Yan
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Huanlei Zhao
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Chaoyang Liu
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Yanbin Wang
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Qiong Su
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Fenping Yin
- Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, Key laboratory for Utility of Environmental-Friendly Composite and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, People's Republic of China
| | - Quanlu Yang
- College of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou, 730030, People's Republic of China
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Zhang G, Deng L, Liu J, Zhang J, Wang J, Li W, Li X. Controllable intercalated polyaniline nanofibers highly enhancing utilization of delaminated RuO2 nanosheets for high‐performance hybrid supercapacitors. ChemElectroChem 2022. [DOI: 10.1002/celc.202200039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gaini Zhang
- Xi'an University of Technology School of Materials Science and Engineering CHINA
| | - Lingjuan Deng
- Xianyang Normal University College of Chemistry and Chemical Engineering CHINA
| | - Jinqian Liu
- Xi'an University of Technology School of Materials Science and Engineering CHINA
| | - Jianhua Zhang
- Xi'an University of Technology School of Materials Science and Engineering CHINA
| | - Jingjing Wang
- Xi'an University of Technology School of Materials Science and Engineering CHINA
| | - Wenbin Li
- Xi'an University of Technology School of Materials Science and Engineering CHINA
| | - Xifei Li
- Xi'an University of Technology Institute of Energy No. 5 South Jinhua Rd 710047 Xi'an CHINA
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Pan Z, Yang J, Kong J, Loh XJ, Wang J, Liu Z. "Porous and Yet Dense" Electrodes for High-Volumetric-Performance Electrochemical Capacitors: Principles, Advances, and Challenges. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103953. [PMID: 34796698 PMCID: PMC8811823 DOI: 10.1002/advs.202103953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Indexed: 06/13/2023]
Abstract
With the ever-rapid miniaturization of portable, wearable electronics and Internet of Things, the volumetric performance is becoming a much more pertinent figure-of-merit than the conventionally used gravimetric parameters to evaluate the charge-storage capacity of electrochemical capacitors (ECs). Thus, it is essential to design the ECs that can store as much energy as possible within a limited space. As the most critical component in ECs, "porous and yet dense" electrodes with large ion-accessible surface area and optimal packing density are crucial to realize desired high volumetric performance, which have demonstrated to be rather challenging. In this review, the principles and fundamentals of ECs are first observed, focusing on the key understandings of the different charge storage mechanisms in porous electrodes. The recent and latest advances in high-volumetric-performance ECs, developed by the rational design and fabrication of "porous and yet dense" electrodes are then examined. Particular emphasis of discussions then concentrates on the key factors impacting the volumetric performance of porous carbon-based electrodes. Finally, the currently faced challenges, further perspectives and opportunities on those purposely engineered porous electrodes for high-volumetric-performance EC are presented, aiming at providing a set of guidelines for further design of the next-generation energy storage devices.
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Affiliation(s)
- Zhenghui Pan
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Jie Yang
- Department of Electrical and Computer EngineeringNational University of SingaporeSingapore117583Singapore
| | - Junhua Kong
- Institute of Materials Research and Engineering (IMRE)A*STAR (Agency for Science, Technology and Research)2 Fusionopolis WaySingapore138634Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE)A*STAR (Agency for Science, Technology and Research)2 Fusionopolis WaySingapore138634Singapore
| | - John Wang
- Department of Materials Science and EngineeringNational University of SingaporeSingapore117574Singapore
| | - Zhaolin Liu
- Institute of Materials Research and Engineering (IMRE)A*STAR (Agency for Science, Technology and Research)2 Fusionopolis WaySingapore138634Singapore
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Upcycling of Wastewater via Effective Photocatalytic Hydrogen Production Using MnO 2 Nanoparticles-Decorated Activated Carbon Nanoflakes. NANOMATERIALS 2020; 10:nano10081610. [PMID: 32824542 PMCID: PMC7466657 DOI: 10.3390/nano10081610] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 01/13/2023]
Abstract
In the present work, we demonstrated the upcycling technique of effective wastewater treatment via photocatalytic hydrogen production by using the nanocomposites of manganese oxide-decorated activated carbon (MnO2-AC). The nanocomposites were sonochemically synthesized in pure water by utilizing MnO2 nanoparticles and AC nanoflakes that had been prepared through green routes using the extracts of Brassica oleracea and Azadirachta indica, respectively. MnO2-AC nanocomposites were confirmed to exist in the form of nanopebbles with a high specific surface area of ~109 m2/g. When using the MnO2-AC nanocomposites as a photocatalyst for the wastewater treatment, they exhibited highly efficient hydrogen production activity. Namely, the high hydrogen production rate (395 mL/h) was achieved when splitting the synthetic sulphide effluent (S2− = 0.2 M) via the photocatalytic reaction by using MnO2-AC. The results stand for the excellent energy-conversion capability of the MnO2-AC nanocomposites, particularly, for photocatalytic splitting of hydrogen from sulphide wastewater.
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Qi J, Zhu Y, Zhang J, Wang C. Mulberry‐Like Core‐Shell Structured C@MnO
2
as Electrode Material for Li–Ion Batteries and Pseudo‐Capacitors. ChemistrySelect 2020. [DOI: 10.1002/slct.201904098] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jie Qi
- Key Laboratory for Green Chemical Technology of MOESchool of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin Tianjin 300072 P. R. China
| | - Youyu Zhu
- Key Laboratory for Green Chemical Technology of MOESchool of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin Tianjin 300072 P. R. China
| | - Jizong Zhang
- Key Laboratory for Green Chemical Technology of MOESchool of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin Tianjin 300072 P. R. China
| | - Chengyang Wang
- Key Laboratory for Green Chemical Technology of MOESchool of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin Tianjin 300072 P. R. China
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Wu J, Zhang J, Ai Y, Li J, Zhang X, Hu ZN, Wang H, Liang Q, Sun HB. Cobalt-promoted fabrication of 3D carbon with a nanotube-sheet mutual support structure: scalable preparation of a high-performance anode material for Li-ion batteries. NANOTECHNOLOGY 2019; 31:085402. [PMID: 31689700 DOI: 10.1088/1361-6528/ab5477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Currently, the design of carbon-based composite as a high-performance anode material for lithium-ion batteries (LIBs) presents challenges for commercial application. Herein, we developed a three-dimensional carbon-based material with a nanotube-sheet mutual support structure (MS-CNTS) engineered by the catalytic effect of Co species. The present work highlights a concise 'solvent-free' synthetic method allowing for large-scale output, which is potentially available for low cost commercial use. With the readily available acetylacetonate and cobalt (II) acetylacetonate as starting chemicals, this nanostructured carbonaceous material is fabricated with aldol condensation to construct a Co-contained carbon-link network polymer precursor followed by annealing under argon. It is composed of brim-curled graphene-like carbon nanosheets and carbon nanotubes, which support each other's structures to effectively avoid agglomeration. Therefore, it enables high performance in LIBs. In spite of the trace amount of cobalt, the carbon-based MS-CNTS anode delivers a high charge capacity of 1028 mAh g-1 at 0.1 A g-1, high rate capacity of 495 mAh g-1 at 2 A g-1, and ultra-long cycling life with a very low capacity decay of 0.008% per cycle over 1000 cycles at 0.5 A g-1, accompanied by 100% Coulombic efficiency. From full cell measurements, we further confirm the considerable promise of MS-CNTS as anodes with a long cycling life.
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Affiliation(s)
- Jiajing Wu
- Department of Chemistry, Northeastern University, Shenyang 110819, People's Republic of China
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8
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Dopamine-assisted preparation of Fe3O4@MnO2 yolk@shell microspheres for improved pseudocapacitive performance. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Wang X, Chen L, Zhang S, Chen X, Li Y, Liu J, Lu F, Tang Y. Compounding δ-MnO2 with modified graphene nanosheets for highly stable asymmetric supercapacitors. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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Urea Hydrolysis Over α-MnO2 Catalyst: Preparation, Characterizations and Influencing Factors. Catal Letters 2019. [DOI: 10.1007/s10562-019-02730-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Li Z, Bu F, Wei J, Yao W, Wang L, Chen Z, Pan D, Wu M. Boosting the energy storage densities of supercapacitors by incorporating N-doped graphene quantum dots into cubic porous carbon. NANOSCALE 2018; 10:22871-22883. [PMID: 30488932 DOI: 10.1039/c8nr06986g] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Hierarchical N-doped porous carbon has been prepared by assembling N-doped graphene quantum dots (N-GQDs) onto a carbonized metal-organic framework (cMOF-5) and used as an electrode material for supercapacitors. In this hierarchical composite structure, cMOF-5 provides an effective cubic porous framework with a large specific surface area and good electrical conductivity, while N-GQDs play an important role in enhancing the pseudocapacitive activity and improving the surface wettability of the electrode. Therefore, the N-GQD/cMOF-5 composite electrode material exhibits an outstanding specific capacitance of 780 F g-1 at 10 mV s-1 in a three-electrode system. Moreover, the composite electrode assembled in symmetric supercapacitors also displays a high specific capacitance of 294.1 F g-1 at 0.5 A g-1, excellent rate capacity and remarkable cycling stability with 94.1% of the initial capacitance retained after 5000 cycles at 5 A g-1. When used as the positive electrode, the N-GQD/cMOF-5//AC asymmetric supercapacitor exhibits an energy density of 14.4 W h kg-1 at a power density of 400.6 W kg-1, while the capacitance retention after 5000 cycles reaches 90.1%. The current N-GQD/cMOF-5 composite electrode paves a feasible avenue to improve the capacitive performances of supercapacitors by constructing heteroatom-doped, hierarchically porous carbon architectures.
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Affiliation(s)
- Zhen Li
- Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, P. R. China.
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