Solid electrolyte film for all-solid state secondary battery, solid electrolyte sheet for all-solid state secondary battery, positive electrode active material film for all-solid state secondary battery, negative electrode active material film for all-solid state secondary battery, electrode sheet for all-solid state secondary battery, all-solid state secondary battery, and method for manufacturing all-solid state secondary battery
Provided are an inorganic solid electrolyte material including a sulfide-based inorganic solid electrolyte and an electron-insulating inorganic material that coats a surface of the sulfide-based inorganic solid electrolyte, is solid at 100° C., and fuses at a specific temperature, a slurry using the same, a solid electrolyte film for an all-solid state secondary battery, a solid electrolyte sheet for an all-solid state secondary battery, a positive electrode active material film for an all-solid state secondary battery, a negative electrode active material film for an all-solid state secondary battery, an electrode sheet for an all-solid state secondary battery, an all-solid state secondary battery, and a method for manufacturing an all-solid state secondary battery.
1. An all-solid state secondary battery comprising:
a positive electrode,
a negative electrode, and
a solid electrolyte layer between the positive electrode and the negative electrode, the solid electrolyte layer comprising a solid electrolyte film for an all-solid state secondary battery,
wherein the solid electrolyte film for an all-solid state secondary battery comprises:
an inorganic solid electrolyte material, comprising:
a sulfide-based inorganic solid electrolyte; and
an electron-insulating inorganic material that coats a surface of the sulfide-based inorganic solid electrolyte, is solid at 100° C., and thermally fuses in a temperature range of 200° C. or lower,
wherein the solid electrolyte film for an all-solid state secondary battery, further comprising:
an organic binder.
2. The all-solid state secondary battery according to claim 1 , wherein the electron-insulating inorganic material is sulfur and/or modified sulfur.