Electrochemical stability in cerium-phosphate–coated LiCoO2 thin films

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...

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Published inJournal of materials research Vol. 22; no. 3; pp. 688 - 694
Main Authors Ahn, Donggi, Kim, Chunjoong, Lee, Joon-Gon, Kim, Byoungsoo, Park, Yejun, Park, Byoungwoo
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 01.03.2007
Subjects
Coating
Energy storage
Li
Coating
Energy storage
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Abstract 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.
AbstractList 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.
The electrochemical stability of LiCoO2 thin films was improved by a 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 coatings. 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. 25 refs.
Author Kim, Chunjoong
Lee, Joon-Gon
Ahn, Donggi
Park, Yejun
Kim, Byoungsoo
Park, Byoungwoo
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Snippet The electrochemical stability of LiCoO2 thin films was improved by cerium-phosphate coating deposited at room temperature. The cerium-phosphate coating layer...
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Title Electrochemical stability in cerium-phosphate–coated LiCoO2 thin films
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