Beneficial effects of a Li salt on electrode behavior in an ionic liquid for electric double layer capacitors

被引：11

作者：

Fukuda, Yasutake

Tanaka, Rie

Tshikawa, Masashi ^{[1
]}

机构：

[1] Kansai Univ, Fac Chem Mat & Bioengn, Dept Chem & Mat Engn, Suita, Osaka 5658680, Japan

[2] Kansai Univ, Res Ctr Business Acad Collaborat, Suita, Osaka 5648680, Japan

来源：

ELECTROCHEMISTRY | 2007年 / 75卷 / 08期

关键词：

electric double layer capacitor (EDLC); ionic liquids; cathodic stability; EMIBF4;

D O I：

10.5796/electrochemistry.75.589

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Origins of cathodic stability of an ionic liquid electrolyte, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) containing lithium tetrafluoroborate (LiBF4), are investigated mainly by applying electrochemical impedance spectroscopy for a glassy-carbon electrode interface. Its Helmholtz layer capacitance in the EMIBF4 electrolyte containingr Li+ becomes much higher than that in neat EMIBF4 with increasing cathodic polarization. On the basis of such analyses as well as our hypotheses, a reasonable mechanism for the stabilizing effect induced by the Li salt addition is discussed.

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收藏

页码：589 / 591

页数：3

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