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METHOD FOR MANUFACTURING ELECTROLYTE MATERIAL CONTAINING ALKALI METAL SALT OF BIS(FLUOROSULFONYL)IMIDE AND ORGANIC SOLVENT, AND ELECTROLYTE MATERIAL CONTAINING ALKALI METAL SALT OF BIS(FLUOROSULFONYL)IMIDE AND ORGANIC SOLVENT
METHOD FOR MANUFACTURING ELECTROLYTE MATERIAL CONTAINING ALKALI METAL SALT OF BIS(FLUOROSULFONYL)IMIDE AND ORGANIC SOLVENT, AND ELECTROLYTE MATERIAL CONTAINING ALKALI METAL SALT OF BIS(FLUOROSULFONYL)IMIDE AND ORGANIC SOLVENT
PROBLEM TO BE SOLVED: To provide a manufacturing method which can reduce impurities produced in a process of manufacturing an alkali metal salt of bis(fluorosulfonyl)imide.SOLUTION: A manufacturing method of the present invention is a method for manufacturing an electrolyte material including an alkali metal salt of bis(fluorosulfonyl)imide and an organic solvent (A). The method comprises: a cation exchange step of obtaining an alkali metal salt of bis(fluorosulfonyl)imide by cation exchange in a solution containing an organic solvent (B) different from the organic solvent (A), an ammonium salt of bis(fluorosulfonyl)imide, and an alkali metal compound; a step of depressurizing and/or heating a resultant reaction solution in the presence of the organic solvent (B), thereby removing ammonia from the reaction solution; a step of performing alkali cleaning and/or aqueous cleaning of the reaction solution with the ammonia removed therefrom; and a step of removing the organic solvent (B) and water from the resultant solution by depressurizing and/or heating it in the presence of the organic solvent (A) after the cleaning.SELECTED DRAWING: None
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