Journal
JOURNAL OF MATERIALS RESEARCH
Volume 22, Issue 3, Pages 688-694Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/JMR.2007.0092
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The electrochemical stability of LiCoO2 thin films was improved by cerium-phosphate coating deposited at room temperature. The cerium-phosphate coating layer also effectively suppressed the increase of charge-transfer resistance during cycling. However, the cycling stability and the initial capacity of the coated LiCoO2 thin films deteriorated as the annealing temperature increased, different from other metal-phosphate coating. These phenomena were attributed to the interdiffusion between the cerium-phosphate coating, layer and LiCoO2, thin film, instead of the nanocrystal formation in the amorphous coating layer.
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