Ionic conductivity of polymer gels deriving from alkali metal ionic liquids and negatively charged polyelectrolytes

被引：67
|
作者：
Ogihara, W
Sun, JZ
Forsyth, M
MacFarlane, DR
Yoshizawa, M
Ohno, H
机构：
[1] Tokyo Univ Agr & Technol, Dept Biotechnol, Tokyo 1848588, Japan
[2] Monash Univ, Sch Mat Engn, Clayton, Vic 3800, Australia
[3] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia
来源：
ELECTROCHIMICA ACTA | 2004年 / 49卷 / 11期
关键词：
ionic liquid; ionic conductivity; alkali metal ionic liquid; gel; polyelectrolyte;
D O I：
10.1016/j.electacta.2003.12.011
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We have prepared polymer gel electrolytes with alkali metal ionic liquids (AMILs) that inherently contain alkali metal ions. The AMIL consisted of sulfate anion, imidazolium cation, and alkali metal cation. AMILs were mixed directly with poly(3-sulfopropyl acrylate) lithium salt or poly(2-acrylamido-2-methylpropanesulfonic acid) lithium salt to form polymer gels. The ionic conductivity of these gels decreased with increasing polymer fraction, as in general ionic liquid/polymer mixed systems. At low polymer concentrations, these gels displayed excellent ionic conductivity of 10(-4) to 10(-3) S cm(-1) at room temperature. Gelation was found to cause little change in the Li-7 diffusion coefficient of the ionic liquid, as measured by pulse-field-gradient NMR. These data strongly suggest that the lithium cation migrates in successive pathways provided by the ionic liquids. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1797 / 1801
页数：5
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