Polymer electrolytes based on ethylene oxide-epichlorohydrin copolymers

被引：49

作者：

Gazotti, WA ^{[1
]}

Spinacé, MAS ^{[1
]}

Girotto, EM ^{[1
]}

De Paoli, MA ^{[1
]}

机构：

[1] Univ Estadual Campinas, Lab Polimeros Condutores & Reciclagem, Inst Quim, BR-13081970 Campinas, SP, Brazil

来源：

SOLID STATE IONICS | 2000年 / 130卷 / 3-4期

基金：

巴西圣保罗研究基金会;

关键词：

polymeric electrolyte; ionic conductivity; ethylene oxide copolymers; elastomers;

D O I：

10.1016/S0167-2738(00)00550-6

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：

In this work we studied the ionic conductivity for three copolymers of the title co-monomers as a function of LIClO4 content, temperature and ambient relative humidity. We also investigated the interactions between the salt and the co-monomer blocks in the copolymers and its effect on the morphology and thermal properties of the copolymer/salt complexes. Our data indicate that the Li+ ion predominantly interacts with the ethylene oxide repeating units of the copolymers. The copolymer with the highest ionic conductivity was obtained with an ethylene oxide/epichlorohydrin ratio of 84/16 containing 5.5% (w/w) of LiClO4. It showed a conductivity of 4.1 X 10(-5) S cm(-1) (30 degrees C, humidity < 1 ppm) and 2.6 X 10(-4) S cm(-1) at 84% relative humidity (24 degrees C). The potential stability window of the copolymer/salt complex is 4.0 V, as measured by cyclic voltammetry. For comparison, we also prepared a blend of the corresponding homopolymers containing LiClO4; it showed higher crystallinity and lower ionic conductivity. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：281 / 291

页数：11

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