Influence of Solvent Addition on the Properties of Ionic Liquids

被引：34

作者：

Le, M. L. Phung ^{[1
,2
]}

Cointeaux, Laure ^{[1
]}

Strobel, Pierre ^{[2
]}

Lepretre, Jean-Claude ^{[1
]}

Judeinstein, Patrick ^{[3
]}

Alloin, Fannie ^{[1
]}

机构：

[1] Univ Savoie, Univ Joseph Fourier, Grenoble INP, LEPMI UMR CNRS 5279, F-38402 St Martin Dheres, France

[2] Inst Neel, F-38054 Grenoble, France

[3] Univ Paris Sud, UMR 8182, ICMMO, F-91405 Orsay, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 14期

关键词：

TEMPERATURE MOLTEN-SALTS; ACETONITRILE SOLUTIONS; LITHIUM; ELECTROLYTES; VISCOSITY; CONDUCTIVITY; NMR; POTENTIALS; SIMULATION; ELECTRODES;

D O I：

10.1021/jp301322x

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：

The effects of the incorporation of ethylene carbonate (EC) or dimethyl carbonate on the physicochemical and electrochemical properties of ionic liquids (ILs) based on aliphatic quaternary ammonium and imide anion were studied. The evolution of the melting point, glass transition, ionic conductivity, diffusion coefficient, and electrochemical stability were evaluated. The addition of a low amount of solvent, that is, 20 wt 96, allows us to improve significantly the conductivity values, reaching 12 mS/cm at 40 degrees C. The incorporation of a polar solvent, EC, has no positive effect on the IL dissociation. Moreover, the incorporation of EC in ILs improves the electrochemical stability toward reduction, whereas the high anodic stability is maintained. The addition of LiTESI in IL + solvent electrolytes has been investigated. Although this addition reduces the ionic conductivity, this decrease is less pronounced than in pure ILs, showing the beneficial effect of the additive solvent.

引用

页码：7712 / 7718

页数：7

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