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Electrochemical and Solid-State Letters

Article . 2007 . Peer-reviewed

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Electrochemical and Solid-State Letters

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Effects of Alkyl Chain in Imidazolium-Type Room-Temperature Ionic Liquids as Lithium Secondary Battery Electrolytes

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jan 2007Publisher:The Electrochemical SocietyJournal:Electrochemical and Solid-State Letters, volume 10, page A237 (issn: 1099-0062,

Authors: Nobuyuki Terada; Yuichi Mita; Hajime Miyashiro; Akira Usami; Masayoshi Watanabe; Shiro Seki; Yasutaka Ohno; +2 Authors

doi: 10.1149/1.2768168

Effects of Alkyl Chain in Imidazolium-Type Room-Temperature Ionic Liquids as Lithium Secondary Battery Electrolytes

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Abstract

Lithium secondary batteries that use a room-temperature ionic liquid as an electrolyte were investigated for the purpose of realizing high-safe batteries. For the improvement of stability under charge/discharge operation with electrodes, we focused attention on a series of l-alkyl-3-methyl-imidazolium bis(trifluoromethane sulfonyl)imide. The temperature dependence of ionic conductivity and battery charge-discharge performance were examined by changing the alkyl chain lengths: -methyl/-ethyl/-butyl/-hexyl/-octyl. According to the results, the effects of extending the alkyl chain were confirmed in, for example, the increase in carrier ion number, and the improvement of battery charge-discharge performance characteristics.

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