期刊
CHINESE JOURNAL OF CHEMISTRY
卷 35, 期 1, 页码 61-66出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.201600212
关键词
asymmetric supercapacitor; tungsten trioxide; nanowire
资金
- Distinguished Young Scientists Program of the National Natural Science Foundation of China [51425301]
- Science and Technology Commission of Shanghai Municipality [12JC1401200, 14520721800]
- Hunan Provincial Natural Science Foundation of China [14JJ2081]
An asymmetric supercapacitor (ASC) was assembled by using an activated carbon as positive electrode and WO3 nanowire as negative electrode, and its electrical performances were tested in voltage windows ranging from 0 to 1.5V. A high specific capacitance of 51F center dot g(-1) could be achieved at the current density of 0.25 A center dot g(-1). Moreover, the ASC displays a good cycling stability with 86% of capacitance retention after 800 cycles, its energy density can be up to 11.9Wh center dot kg(-1) at the power density of 210W center dot kg(-1), and remains 7.7Wh center dot kg(-1) at a power density of 1250W center dot kg(-1). The excellent electrical performance is perhaps due to the crystal orientation of (001) planes for the WO3 nanowire, which favors the rapid reaction between W(VI) and H+ cations. This aqueous asymmetric WO3//AC supercapacitor is promising for practical applications due to its easy preparation of WO3.
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