Preparation of nano-LiCoO_2 thin film by sol-gel method

Here the LiCoO2 nano-crystallization was prepared by calcination of a thin film covered on the solid substrates. The thin film was obtained by spinning coating the solution consisting of LiNO3, Co(NO3)2 and PAA on the pre-cleaned glass substrate by a sol-gel method. The polarizing microscope, scanning electron microscope and atomic force microscopy analysis show that the content of PAA, the total concentration and the ratio of both Li+ and Co2+ have significant influences on the film composition, thus the morphology of thin films, whereas the spin speed can dominate the film morphology and the process of the nano-crystallization. It was found that the best sintering temperature of the thin films is about 600℃ in this study.