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

Abstract

An effect of surface area and microstructure of Li_0.29La_0.57TiO₃ (LLTO) solid electrolyte on an electrochemical performance of LiCoO₂ (LCO) as positive electrode in an all-solid-state Li secondary battery was examined. The surface of LLTO sintered body was machined mechanically by using a pico-second laser and obtained in various forms of LLTO. Then, LCO on the LLTO was prepared from molten salts as a starting material. The microstructural observation confirmed that LCO was formed on the surface of a laser-machined LLTO. A discharge capacity was enlarged with the amount of LCO loading. These results suggest that the LCO formed on LLTO by molten salts was active electrochemically regardless of various shapes of microstructures of the solid electrolyte.

 

This Paper was Originally Published in Japanese in J. Jpn. Soc. Powder Powder Metallurgy 69 (2022) 104–107.