Abstract
In this paper, the hierarchical porous carbon coated nickel cobalt sulphide (NiCo2S4@HPC) nanowire composites in situ grown on Ni foam have been fabricated by a facile two-step hydrothermal method. The HPC with three-dimensional interconnected macroporous framework not only improves the structural stability subject to repeated charge-discharge cycles, but also enhances the conductivity and facilitates the rapid charge storage of NiCo2S4. When evaluated as an electrode material for supercapacitor, the NiCo2S4@HPC composite electrode exhibits a superior specific capacitance (1682.5 F/g at the current density of 1 A/g) and high cycling stability of 93.7 % capacitance retention after 2000 cycles at 1 A/g, which are superior to most reported NiCo2S4-based electrode materials, confirming the outstanding electrochemical performance of the NiCo2S4@HPC composite electrode. The present work not only proves the NiCo2S4@HPC nanowire composite to be an excellent electrode material for supercapacitors, but also promotes the practical applications of NiCo2S4-based composite materials in high-performance energy storage devices.
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Acknowledgements
The authors gratefully acknowledge the financial supports from the General Program of Chongqing Natural Science Foundation (cstc2019jcyj-msxmX0875, cstc2019jcyj-msxmX0411, cstc2019jcyj-msxmX0874), the Major Research Training Program of Chongqing University of Arts and Sciences (P2018CL08), and the Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN201901319, KJQN202001323).
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Liu, Y., Niu, S. & Hu, R. Construction of hierarchical porous carbon coated NiCo2S4 nanowire composites for high‐performance supercapacitors. J Porous Mater 28, 1345–1353 (2021). https://doi.org/10.1007/s10934-021-01083-3
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DOI: https://doi.org/10.1007/s10934-021-01083-3