Solid electrolyte material of conducting lithium ion, battery device using the solid electrolyte material and all-solid lithium secondary battery provided with the battery device

摘要

A solid electrolyte material of conducting a lithium ion comprises a sulfide-based lithium-ion conductor and α-alumina. Such a solid electrolyte material exhibits superior lithium-ion conductivity. Further, a battery device provided with such a solid electrolyte material is also provided. Furthermore, an all-solid lithium-ion secondary battery provided with such a battery device is also provided.

主权项

1. A solid electrolyte material comprising a sulfide-based lithium-ion conductor, α-alumina, and an organic binder constituted of a resin material as a main constituent material thereof,
wherein the sulfide-based lithium-ion conductor is Li2S—GeS2—P2S5, Li2S—P2S5, or Li2S—P2S5—LiI, and wherein the resin material is constituted of at least one of polyamide or polyimide as a main component thereof, and wherein an amount of the α-alumina contained in the electrolyte material is 5 wt % at a ratio by weight to the sulfide-based lithium-ion conductor.