Overcharge protection for high voltage lithium cells using two electroactive polymers

被引：27

作者：

Chen, GY ^{[1
]}

Richardson, TJ ^{[1
]}

机构：

[1] Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2006年 / 9卷 / 01期

关键词：

Lithium batteries;

D O I：

10.1149/1.2135428

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A bilayer conducting polymer composite separator provides overcharge protection for high voltage rechargeable lithium batteries. The polymer with the higher oxidation potential is placed in contact with the cathode and sets the overcharge protection limit, while the lower voltage polymer completes the reversible shunt and protects the high voltage polymer from degradation due to instability at the anode potential. The passage of an oxidation front through such a polymer bilayer was visualized using a transparent thin- film cell, and the approach was successfully used for internal protection of LiFePO4/ Li cells and external protection of LiNi0.8Co0.15Al0.05O2/ Li cells. (c) 2005 The Electrochemical Society.

引用

页码：A24 / A26

页数：3

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