Tuning Binary Ionic Liquid Mixtures: Linking Alkyl Chain Length to Phase Behavior and Ionic Conductivity

被引：50

作者：

Fox, Eric T. ^{[1
]}

Weaver, Joshua E. F. ^{[1
]}

Henderson, Wesley A. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Chem & Biomol Engn, Ion Liquids & Electrolytes Energy Technol ILEET L, Raleigh, NC 27695 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 08期

关键词：

ELECTROCHEMICAL PROPERTIES; ELECTROLYTES; SOLVENT; TEMPERATURE; VISCOSITY; CATIONS; ANIONS; ENERGY;

D O I：

10.1021/jp300667h

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 use of mixed salts to generate new composite ionic liquids (ILs) provides a facile means of readily tuning or tailoring the desired properties of ionic media. Despite this, very little information is available about how the structure of the selected ions and composition impacts the properties of salt mixtures. To explore this, six binary IL1-IL2 mixtures based on N-alkyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide salts have been characterized. The physicochemical properties (density, viscosity, and ionic conductivity) and phase behavior of these mixtures are reported. The variation of the alkyl chains lengths on the cations plays a significant role in determining both the phase behavior and the physicochemical properties of the mixtures. Notably, the "tunability" of the properties of the IL mixtures is much easier to control than is found by simply making small structural changes to the ions in a given salt.

引用

页码：5271 / 5275

页数：5

共 25 条

[11] Electrolytic conductivity and glass transition temperature as functions of salt content, solvent composition, or temperature for LiPF6 in propylene carbonate plus diethyl carbonate [J].