期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 11, 期 6, 页码 1325-1328出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.05.003
关键词
Supercapacitor; V2O5 center dot 0.6H(2)O; K+; Intercalation; Aqueous electrolyte
资金
- 973 Program [2007CB209702]
V2O5 center dot 0.6H(2)O nanoribbons were prepared and their electrochemical behaviors in K2SO4 aqueous solution were investigated. Results show for the first time that K+ ions Could intercalate/deintercalate reversibly in the V2O5 center dot 0.6H(2)O lattice. An asymmetric supercapacitor activated carbon/0.5 mol/l K2SO4/V2O5 center dot 0.6H(2)O was successfully assembled, which could be cycled reversibly in the voltage region of 0-1.8 V. This supercapacitor presents an energy density of 29.0 Wh/kg based on the total mass of the active electrode materials, a very good rate behavior with energy density of 20.3 Wh/kg at power density of 2 kW/kg, and also a rather good cycling performance. (c) 2009 Elsevier B.V. All rights reserved.
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