Electrochemical stability in cerium-phosphate-coated LioO2 thin films

被引：12

作者：

Ahn, Donggi

Kim, Chunjoong

Lee, Joon-Gon

Kim, Byoungsoo

Park, Yejun

Park, Byoungwoo ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, Res Ctr Energy Convers & Storage, Seoul 151744, South Korea

来源：

JOURNAL OF MATERIALS RESEARCH | 2007年 / 22卷 / 03期

关键词：

D O I：

10.1557/JMR.2007.0092

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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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页码：688 / 694

页数：7

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