期刊
APPLIED SURFACE SCIENCE
卷 483, 期 -, 页码 593-600出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.03.345
关键词
Double layered hydroxide; Reduced graphene oxide; Vertical growth; Carbon cloth; Symmetric supercapacitor
类别
资金
- National Key Research and Development Program of China [2018YFC0810300]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions
- National Natural Science Foundation of China [51803078]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_1821]
- Fundamental Research Funds for the Central Universities [JUSRP11701]
- National first-class discipline program of Light Industry Technology and Engineering [LITE2018-21]
- Natural Science Foundation of Jiangsu Province [BK20180628]
- 111 Project [B17021]
- Anhui Department of Education of China [2015LJRCTD001]
Nickel hydroxide as a potential electrode material was widely used in supercapacitor, but its electrochemical performance is limited due to its low conductivity, insufficient structure and weak stability. In this work, we reported a simple one-pot hydrothermal method of vertically growing cobalt-nickel hydroxide (Co-Ni-OH) and rGO nanosheets on conductive carbon cloth (Co-Ni-OH/rGO/CC). We demonstrated that the capacitive performance of Co-Ni-OH electrode could be significantly improved by adding rGO with uniform vertically growing nanostructure, which shortened ion diffusion paths and avoided the interface resistance. As pseudocapacitors, the as-prepared Co-Ni-OH/rGO/CC electrode showed a notable enhanced specific capacitance (151.46 F g(-1) at 2.5 A g(-1)) and a good cycling stability (88.0% after 1000 cycles). Moreover, the symmetric supercapacitor composed of two as-prepared Co-Ni-OH/rGO/CC electrodes achieved a high energy density of 30.29 W h kg(-1) at a power density of 1500 W kg(-1) (based on active materials) and remarkable cycling stability (85.6% after 3000 cycles). This finding provides a simple and effective way to fabricate a promising electrode material for high-performance supercapacitor and other energy storage device.
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