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Enhanced electrochemical properties of fluoride-coated LiCoO2 thin films

Hye Jin Lee, Seuk Buom Kim and Yong Joon Park*

Author Affiliations

Department of Advanced Materials Engineering, Kyonggi University, Gyeonggi-do, 443-760, Republic of Korea

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Nanoscale Research Letters 2012, 7:16  doi:10.1186/1556-276X-7-16

Published: 5 January 2012


The electrochemical properties of fluoride-coated lithium cobalt oxide [LiCoO2] thin films were characterized. Aluminum fluoride [AlF3] and lanthanum fluoride [LaF3] coating layers were fabricated on a pristine LiCoO2 thin film by using a spin-coating process. The AlF3- and LaF3-coated films exhibited a higher rate capability, cyclic performance, and stability at high temperature than the pristine film. This indicates that the AlF3 and LaF3 layers effectively protected the surface of the pristine LiCoO2 film from the reactive electrolyte.