SULFIDE SOLID ELECTROLYTE AND METHOD FOR PRODUCING SULFIDE SOLID ELECTROLYTE

Japanese Patent JP2015072773

A

PROBLEM TO BE SOLVED: To provide a sulfide solid electrolyte having high ion conductivity and capable of being mass produced at low cost, and a method for producing the sulfide solid electrolyte.SOLUTION: The present invention relates to a sulfide solid electrolyte containing a deposit obtained by mixing LiS and PSin an organic solvent that contains a compound comprising tetrahydrofuran to which an ether group or a 1-3C hydrocarbon group is bonded or a compound including an ether structure. The deposit preferably has an ion conductivity in a range of 10-10S/cm. The sulfide solid electrolyte of the present invention is preferably an amorphous form or a crystalline body which contains at least one or more among LiPS, LiPSand LiPS. A molar ratio between LiS and PSwhich are added in the organic solvent is represented by x:1-x, and x is preferably a value satisfying 0.1