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Jiang H, Cheng J, He J, Pu C, Huang X, Chen Y, Lu X, Lu Y, Zhang D, Wang Z, Leng Y, Chu PK, Luo Y. Cobalt-Nickel Layered Double Hydroxides on Electrospun MXene for Superior Asymmetric Supercapacitor Electrodes. ACS OMEGA 2023; 8:49017-49026. [PMID: 38162737 PMCID: PMC10753703 DOI: 10.1021/acsomega.3c06674] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 01/03/2024]
Abstract
Flexible electrodes for energy storage and conversion require a micro-nanomorphology and stable structure. Herein, MXene fibers (MX-CNF) are fabricated by electrospinning, and Co-MOF nanoarrays are prepared on the fibers to form Co-MOF@MX-CNF. Hydrolysis and etching of Co-MOF@MX-CNF in the Ni2+ solution produce cobalt-nickel layered double hydroxide (CoNi-LDH). The CoNi-LDH nanoarrays on the MX-CNF substrate have a large specific surface area and abundant electrochemical active sites, thus ensuring effective exposure of the CoNi-LDH active materials to the electrolyte and efficient pseudocapacitive energy storage and fast reversible redox kinetics for enhanced charging-discharging characteristics. The CoNi-LDH@MX-CNF electrode exhibits a discharge capacity of 996 F g-1 at a current density of 1 A g-1 as well as 78.62% capacitance retention after 3,000 cycles at 10 A g-1. The asymmetric supercapacitor (ASC) comprising the CoNi-LDH@MX-CNF positive electrode and negative activated carbon electrode shows an energy density of 48.4 Wh kg-1 at a power density of 499 W kg-1 and a capacity retention of 78.9% after 3,000 cycles at a current density of 10 A g-1. Density-functional theory calculations reveal the charge density difference and partial density of states of CoNi-LDH@MX-CNF confirming the large potential of the CoNi-LDH@MX-CNF electrode in energy storage applications.
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Affiliation(s)
- Hao Jiang
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Jinbing Cheng
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Junbao He
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Chunying Pu
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Xiaoyu Huang
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Yichong Chen
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Xiaohong Lu
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Yang Lu
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
| | - Deyang Zhang
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
| | - Zhaorui Wang
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
| | - Yumin Leng
- School
of Mathematics and Physics, Anqing Normal
University, Anqing 246133, P. R. China
| | - Paul K. Chu
- Department
of Physics, Department of Materials Science & Engineering, and
Department of Biomedical Engineering, City
University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Yongsong Luo
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
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