Correlation between local strain and cycle-life performance of AlPO4-coated LiCoO2 cathodes

被引：62
作者：
Kim, B
Lee, JG
Choi, M
Cho, J
Park, B [1 ]
机构：
[1] Seoul Natl Univ, Res ctr Energy Convers & Storage, Sch Mat Sci & Engn, Seoul, South Korea
[2] Kumoh Natl Inst Technol, Dept Appl Chem, Gumi, South Korea
来源：
JOURNAL OF POWER SOURCES | 2004年 / 126卷 / 1-2期
关键词：
AlPO4-nanoparticle coating; LiCoO2; local strain; battery; cycle-life;
D O I：
10.1016/j.jpowsour.2003.08.038
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：
AIPO(4)-coated LiCoO2 cathodes display improved cycle-life performance compared with bare LiCoO2. This is attributed to suppression of cobalt dissolution from the cathodes by the AIPO(4)-nanoparticle coating. Dissolution of cobalt during cycling with a charge cut-off voltage of 4.6 V leads to structural degradation, and induces a non-uniform distribution of local strain in the cathodes. The strain in coated samples is significantly reduced after 50 cycles, and is correlated with the enhanced cycle-life performance. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：190 / 192
页数：3
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