Abstract: To improve the electrochemical properties of LiCoO2, a nanograde ZrO2 coating was deposited on it via impregnation. With the Zr(OH)x(CH3COO)y dissolved in deionized water, the LiCoO2 powder was immersed in the solution. Then, the LiCoO2 with ZrO2 coating was obtained after ultrasonic agitation, solvent evaporation and calcination at high temperature. X-ray absorption near edge spectrum(XANES) was used to investigate the structure of coated LiCoO2 and check the effect of the coating on the structure. The results of cyclic voltammogram testing showed that the ZrO2 coating can affect both the oxidation and reduction processes of LiCoO2. The results of charge/discharge tests revealed that the electro chemical properties of LiCoO2 change little at normal temperature after coating, but its charging/discharging efficiency can be improved at higher temperature, e.g., 55°C.