期刊
JOURNAL OF ENERGY CHEMISTRY
卷 27, 期 1, 页码 195-202出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jechem.2017.10.034
关键词
All solid-state; NiCo2O4 nanowires; Carbon cloth; Activated carbon cloth; Asymmetric supercapacitor
资金
- National Natural Science Foundation of China [51402324, 51402325, 51302281]
Recently, binary metal oxides have been considerably researched for energy storage since it can provide higher electrical conductivity and electrochemical activity than single components. Besides, rational arrays structure design can effectively enhance the utilization of active material. In this article, we synthesis a porous NiCo2O4 nanowires arrays, which were intimate contact with flexible carbon cloth (CC) by a facile hydrothermal reaction and calcination treatment. The rational array structures of NiCo2O4 facilitate the diffusion of electrolyte and effectively increase the utilization of active material. The asobtained NiCo2O4@CC electrode exhibits a high capacitance of 1183 mF cm(-2) and an outstanding capacitance retention of 90.4% after 3000 cycles. Furthermore, a flexible asymmetric supercapacitor (ASC) using NiCo2O4@CC as positive electrode and activated carbon cloth (ACC) as negative electrode was fabricated, which delivers a large capacitance of 750 mF cm(-2) (12.5 F cm(-3)), a high energy density of 0.24 mWh cm(-2) (3.91 mWh cm(-3)), as well as excellent cycle stability under different bending states. These remarkable results suggest that as-assembled NiCo2O4@CC//ACC ASC is a promising candidate in flexible energy storage applications. (c) 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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