SOLID ELECTROLYTE COMPOSITION, METHOD FOR PRODUCING SOLID ELECTROLYTE COMPOSITION, AND METHOD FOR PRODUCING SOLID ELECTROLYTE MEMBER

A solid electrolyte composition of the present disclosure includes: a solid electrolyte material having ion-binding properties; and an organic solvent. The organic solvent includes: a halogen-group-containing compound; and at least one selected from the group consisting of an ether-group-containing compound and a hydrocarbon.