期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 706, 期 -, 页码 1-6出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2013.07.032
关键词
Asymmetric supercapacitor; Nano-wired Co3O4; Activated carbon; Energy density
资金
- National Nature Science Foundation of China [51002166, 51172251, 510611 30536]
- Shanxi Province Science Foundation for Youths [2010 021023-3]
A nano-wired Co3O4 was successfully synthesized by a hydrothermal method in combination with subsequent calcination process. An asymmetric supercapacitor based on the Co3O4 as the positive electrode and the activated carbon (AC) as the negative electrode with a 6 M KOH solution as electrolyte was assembled. The electrochemical performance of the asymmetric supercapacitor was investigated by means of cyclic voltammetry and galvanostatic charge-discharge tests. A specific capacitance of 81 F g(-1) as well as specific energy density of 24.9 W h kg(-1) was obtained for the asymmetric supercapacitor within the voltage range of 0-1.5 V. The supercapacitor also exhibited a good cycling performance and kept 90% of initial capacity after 5000 cycles. (C) 2013 Elsevier B.V. All rights reserved.
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