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

页码：190 / 192

页数：3