期刊
JOURNAL OF POWER SOURCES
卷 104, 期 1, 页码 62-65出版社
ELSEVIER
DOI: 10.1016/S0378-7753(01)00873-4
关键词
capacitance; calcination; nanocrystallites; ruthenium oxide; supercapacitor; xerogel
A Sb (6 mol%)-doped SnO2 xerogel impregnated with RuO2 nanocrystallites is prepared via an incipient-wetness method and is optimized for its electrochemical capacitance in aqueous 1 M KOH electrolyte by adjusting the calcination temperature and the RuO2 loading, The electrode capacitance does not increase monotonically with increasing RuO2 loading. A maximum electrode capacitance of 15 Fg(-1), which represents a three-fold increase compared with the blank xerogel and a specific RuO2 capacitance of 710 Fg(-1) RuO2, is obtained with a RuO2 loading of 1.4 wt.% and by calcination at 200 degreesC. Higher loadings presumably result in a homogeneous nucleation upon drying, which causes severe reduction in the total surface area of the RuO2 crystallites. (C) 2002 Elsevier Science B.V. All rights reserved.
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