Bulk-type all-solid-state lithium secondary battery with Li 2S-P2S5 thin-film separator

Abstract

Bulk-type all-solid-state batteries currently use a compressed powder pellet with the thickness of several hundred micrometers as a solid electrolyte separator. In this study, all-solid-state lithium secondary batteries (In/LiCoO2) with a thin Li2S-P2S5 solid electrolyte separator were constructed; their charge-discharge performance was investigated. The all-solid-state batteries using the Li 2S-P2S5 separator with a thickness of 3 μm were charged and discharged with the capacity of 93 mAhg-1. This result suggests that bulk-type all-solid-state batteries were successfully prepared with the solid electrolyte separator with several micrometer thicknesses. © The Electrochemical Society of Japan, All rights reserved.