The preparation of quaternary ammonium-based ionic liquid containing a cyano group and its properties in a lithium battery electrolyte

被引：100

作者：

Egashira, M

Okada, S

Yamaki, J

Dri, DA

Bonadies, F

Scrosati, B

机构：

[1] Kyushu Univ, Inst Mat Chem & Engn, Kasuga, Fukuoka 8168580, Japan

[2] Univ Roma La Sapienza, Dept Chem, I-00185 Rome, Italy

来源：

JOURNAL OF POWER SOURCES | 2004年 / 138卷 / 1-2期

基金：

日本科学技术振兴机构;

关键词：

ionic liquid; lithium battery; cyano group;

D O I：

10.1016/j.jpowsour.2004.06.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A room temperature ionic liquid consisting of NNNN-cyanomethyl trimethyl ammonium (CTMA) cation and bis(trifluoromethane sulfone)imide (TFSI) anion was newly synthesized, and its electrochemical properties were investigated. This ionic liquid has a melting point of 35 degreesC and an order of conductivity of 10(-4) S Cm-1. Lithium deposition/dissolution tests in 0.2 mol dm(-3) LiTFSI/CTMATFSI electrolytes showed an improved cycle behavior compared with that of a Li electrolyte based on a tetraalkylammonium ionic liquid without a cyano group. It is suggested that such an improvement may be associated with the formation of a protective film on the lithium surface. Introducing a proper functional group is suggested to be effective to improve the interfacial properties of ionic liquid. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：240 / 244

页数：5

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