Electrochemical properties of amorphous comb-shaped composite PEO polymer electrolyte

被引:23
作者
Chung, JS
Sohn, HJ [1 ]
机构
[1] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151742, South Korea
[2] Seoul Natl Univ, Dept Minerals & Petr Engn, Seoul 151742, South Korea
关键词
polyethylene oxide; trioxyethylene; composite polymer electrolyte; CuS cathode;
D O I
10.1016/S0378-7753(02)00484-6
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
The electrochemical behaviour of a polyethylene oxide (PEO)-based composite polymer electrolyte are studied. The crystallinity of the PEO is suppressed by using a comb-shaped polymer to improve polymer chain mobility. An amorphous comb-shaped polymer, 'TEC-24', with a side-chain content of 24 mol%, is designed and fine silica powder is dispersed within it to enhance the mechanical properties above the melting point. The composite polymer electrolyte has an ionic conductivity of 1.6 x 10(-4) and 1.6 x 10(-3) S cm(-1) at 30 and 90 degreesC, respectively, with an electrochemical stability window close to 5.0 V, even at 80 degreesC (versus Li/Li+). The polymer electrolyte is evaluated using CuS as a cathode material and shows better cycle performance than that obtained with a liquid electrolyte. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:671 / 675
页数:5
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