Physical and electrochemical properties of low-viscosity phosphonium ionic liquids as potential electrolytes

被引：424

作者：

Tsunashima, Katsuhiko ^{[1
]}

Sugiya, Masashi ^{[1
]}

机构：

[1] Nippon Chem Ind Co Ltd, Organ Chem R&D Dept, Koto Ku, Tokyo 1368515, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2007年 / 9卷 / 09期

关键词：

ionic liquids; quaternary phosphonium compounds; bis(trifluoromethylsulfonyl)imide anion; potential window; thermal decomposition temperature; TEMPERATURE MOLTEN-SALTS; SENSITIZED SOLAR-CELLS; LI/LICOO2; CELL; CATIONS; PERFORMANCE; PHOSPHATE; BASE;

D O I：

10.1016/j.elecom.2007.07.003

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A new group of room temperature ionic liquids based on triethylalkylphosphonium cations together with a bis(trifluoromethylsulfonyl)imide anion as a novel electrolyte is presented in this report. It was found that phosphonium ionic liquids showed lower viscosities and higher conductivities than those of the corresponding ammonium ionic liquids. Particularly, phosphonium ionic liquids containing a methoxy group, triethyl(methoxymethyl)phosphonium bis(trifluoromethylsulfonyl)imide and triethyl(2-methoxyethyl)phosphonium bis(trifluoromethylsulfonyl)imide, exhibited quite low viscosities (35 and 44 mPa s at 25 degrees C, respectively). Linear sweep voltammetry measured in neat phosphonium ionic liquids at a glassy carbon electrode indicated wide potential windows (at least -3.0 to +2.3 V vs. Fc/Fc(+)). Thermogravimetric analysis suggested that phosphonium ionic liquids were thermally stable up to nearly 400 degrees C, showing slower gravimetric decreases at high temperature compared to those of the corresponding ammonium ionic liquids. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：2353 / 2358

页数：6

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