Preparation and Electrochemical Properties of LiCoO₂ Electrode Layer by Molten Salts on Mechanical Machined Li_0.29La_0.57TiO₃ Solid Electrolyte

Abstract

We investigated the electrochemically activity of formed LiCoO₂ (LCO) on oxide-based solid electrolytes; Li_0.29La_0.57TiO₃ (LLTO) sintered body by heating the molten salts as starting materials. The effect of surface area and microstructure of LLTO on the electrochemical performance of an all-solid-state Li secondary battery was examined. The surface structure of LLTO was machined mechanically by using a pico-second laser and obtained in various forms of LLTO. Then, LCO on the LLTO was prepared by molten salts. From the microstructural observation, it was confirmed that LCO was formed on the surface of the machined LLTO. A discharge capacity was enlarged as an amount of loading LCO increased. These results suggested that the LCO layer formed on LLTO by molten salts was active electrochemically regardless of the various shape of microstructure of solid electrolyte.