纳米片
超级电容器
材料科学
硫化钴
假电容器
硫化镍
硫化
镍
电容
钴
石墨烯
碳纤维
化学工程
纳米技术
冶金
复合材料
电化学
复合数
电极
工程类
化学
硫黄
物理化学
作者
Tao Liu,Jiahao Liu,Liuyang Zhang,Bei Cheng,Jiaguo Yu
标识
DOI:10.1016/j.jmst.2019.12.027
摘要
Materials featured with self-supported three-dimensional network, hierarchical pores and rich electrochemical 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.
科研通智能强力驱动
Strongly Powered by AbleSci AI