Protection Effect of ZrO 2 Coating Layer on LiCoO 2 Thin Film

The protection effect of a ZrO_2 coating layer on a LiCoO_2 thin film was characterized. A wide and smooth LiCoO_2 thin film offers sufficient opportunity for careful observation of the reaction at the interface between cathode (coated and uncoated) and electrolyte. The formation of a ZrO_2 coating...

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Bibliographic Details
Published in:Bulletin of the Korean Chemical Society 2011, 32(5), , pp.1483-1490
Main Authors: Lee, Hye-Jin, Nam, Sang-Cheol, Park, Yong-Joon
Format: Article
Language:English
Subjects:
화학
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Summary:The protection effect of a ZrO_2 coating layer on a LiCoO_2 thin film was characterized. A wide and smooth LiCoO_2 thin film offers sufficient opportunity for careful observation of the reaction at the interface between cathode (coated and uncoated) and electrolyte. The formation of a ZrO_2 coating on a LiCoO_2 thin film was confirmed by secondary ion mass spectrometry. Scanning electron and atomic force microscopy were used to characterize the surface morphologies of coated and uncoated films before and after cycling. A ZrO_2-coated LiCoO_2 film showed a higher discharge capacity and rate capability than an uncoated film. This may be associated with a surface protection effect of the coating. The surface of a pristine film was damaged during cycling, whereas the coated film maintained a relatively clear surface under the same measurement conditions. This result clearly demonstrates the protection effect of a ZrO_2 coating on a LiCoO_2 thin film. KCI Citation Count: 4
ISSN:0253-2964
1229-5949
DOI:10.5012/bkcs.2011.32.5.1483