期刊
JOURNAL OF POWER SOURCES
卷 126, 期 1-2, 页码 190-192出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2003.08.038
关键词
AlPO4-nanoparticle coating; LiCoO2; local strain; battery; cycle-life
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.
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