Method and apparatus for producing sulfide solid electrolyte

Abstract

A method for producing a sulfide-based solid electrolyte includes heating and melting a raw material in a heating furnace. The heating furnace includes a sulfur supply portion, a partition provided inside the heating furnace, and one or more other structures capable of allowing an inside and an outside of the heating furnace to communicate with each other. The method includes: forming a melt by heating and melting the raw material; dividing a space between the melt and the heating furnace by the partition into a first space in which the sulfur supply portion is located and a second space in which the other structure is located; and forming a sulfur-excess atmosphere portion by introducing a component containing a sulfur element into the first space from the sulfur supply portion.

Dependencies are inferred from the claim text.