硫化物系/酸化物系固体電解質を用いたリチウム金属負極全固体電池の充放電特性解明

抄録

An all solid-state lithium metal battery has high theoretical energy density and is a candidate of a next generation secondary battery for electrical vehicles. However, high cycle performance has not been achieved owing to the lithium dendrite generating in charging process. In this study, cycle performance measurements of all solid-state lithium metal battery symmetric cell are conducted with changing the particle size and the molding pressure of separator made by sulfide and oxide solid electrolyte. The result show that, in the case with sulfide solid electrolyte, solid electrolyte particle size and molding pressure changes the durability of the separator. Relatively high durability is achieved with small size particle and optimum molding pressure. In the case with oxide solid electrolyte, the durability is increased with the decrease in particle size but is not dependent on the molding pressure.