期刊
JOURNAL OF POWER SOURCES
卷 195, 期 9, 页码 3036-3040出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.11.046
关键词
Electrochemical capacitor; Pseudo-capacitance; Ruthenium oxide; Non-aqueous electrolyte; Imidazolium salt
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan
Pseudo-capacitance of composite materials where ruthenium oxide particles are loaded on activated carbon has been evaluated in the electrolyte of 1-ethyl-3-methyl imidazolium tetrafluoroborate dissolved in acetonitrile. The composite materials prepared by conventional a sol-gel method have dispersed structure of ruthenium oxide particle of tens nanometer diameter on the surface of activated carbon. The extent of the pseudo-capacitance of the composite electrodes in the imidazolium salt electrolyte, estimated by the comparison of the capacitance per surface area of electrode in different non-aqueous electrolyte, is ca. 3-5 mu F cm(-2) in addition to the double-layer capacitance of ca. 6 mu F cm(-2), depending on the loading status of ruthenium oxide. The symmetric cell consisting of the composite electrode containing 18 wt% of ruthenium oxide and the imidazolium salt electrolyte provides cell capacitance based on the pseudo-capacitance by a constant-current test. (c) 2009 Elsevier B.V. All rights reserved.
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