期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 47, 期 -, 页码 113-121出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2019.12.027
关键词
Metal-organic framework; Nickel sulfide; Cobalt sulfide; Carbon cloth; Supercapacitor
资金
- NSFC [21801200, U1905215, U1705251, 51872220]
- Innovative Research Funds of SKLWUT [2017-ZD-4]
- Fundamental Research Funds for the Central Universities [WUT: 2019IVB050]
Materials featured with self-supported three-dimensional network, hierarchical pores and rich electro-chemical active sites are considered as promising electrodes for pseudocapacitors. Herein, a novel strategy for the growth of nickel-cobalt bisulfide (NiCoS) nanosheets arrays on carbon cloth (CC) as supercapacitor electrodes is reported, involving deposition of two-dimensional metal-organic framework (MOF) precursors on the CC skeletons, conversion of MOF into nickel-cobalt layered double-hydroxide by ion exchange process and formation of NiCoS by a sulfidation treatment. The NiCoS nanosheets with rough surface and porous structures are uniformly anchored on the CC skeletons. The unique architecture endows the composite (NiCoS/CC) with abundant accessible active sites. Besides, robust electrical/mechanical joint between the nanosheets and the substrates is attained, leading to the improved electrochemical performance. Moreover, an asymmetric supercapacitor device is constructed by using NiCoS/CC and activated carbon as a positive electrode and a negative electrode, respectively. The optimized device exhibits a high specific capacitance, large energy density and long cycle life. The NiCoS/CC electrode with intriguing electrochemical properties and mechanical flexibility holds great prospect for next-generation wearable devices. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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