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http://dx.doi.org/10.5012/jkcs.2006.50.3.243

Structural and Electrochemical Properties of Spin Coated LiCoO2 Cathode Thin Film in Lithium Secondary Batteries  

Gang, Seong-Gu (호서대학교)
Yu, Gi-Cheon (호서대학교)
Publication Information
Journal of the Korean Chemical Society / v.50, no.3, 2006 , pp. 243-246 More about this Journal
Abstract
The LiCoO2 thin films were prepared on the Pt/Ti/SiO2/Si substrate by spin coating using citrate sol. The citrate sol was spin-coated on substrate and dried at 380oC for 15 min. to evaporate the solvents and remove the organic materials. The as-deposited films were annealed at 750oC for 10 min. in air for crystallization. The X-ray diffraction patterns for the film have been indexed hexagonal system with space group R3m. The active area of LiCoO2 films for electrochemical test was about 11cm2. A Li foil and 1M LiClO4 in propylene carbonate(PC) and ethylene carbonate(EC) (1:1)were used as an anode and an electrolyte, respectively. The galvanostatic charge-discharge test was carried out at constant current density ranging from 5 A/cm2 in the voltage window between 4.2 and 3.0 V. The first discharge capacity of the film is 0.35Ah/cm2-m. The cycling behavior of the LiCoO2 film is also reported.
Keywords
LiCoO2; Thin film; Secondary batteries
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