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http://dx.doi.org/10.5012/bkcs.2011.32.5.1483

Protection Effect of ZrO2 Coating Layer on LiCoO2 Thin Film  

Lee, Hye-Jin (Department of Advanced Materials Engineering, Kyonggi University)
Nam, Sang-Cheol (GS NanoTech Co., Ltd.)
Park, Yong-Joon (Department of Advanced Materials Engineering, Kyonggi University)
Publication Information
Bulletin of the Korean Chemical Society / v.32, no.5, 2011 , pp. 1483-1490 More about this Journal
Abstract
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.
Keywords
Cathode; $ZrO_2$; Surface coating; Lithium battery; Thin film;
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Times Cited By Web Of Science : 1  (Related Records In Web of Science)
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