| abstract |
Provided is an electrolyte material containing N- (fluorosulfonyl) -N- (fluoroalkylsulfonyl) imide and di (fluorosulfonyl) imide, which has reduced residual solvent that affects the properties of the electrolyte material. A method for producing an electrolyte material containing a fluorosulfonylimide salt represented by the following general formula (1) and an electrolyte solvent, wherein the solution containing the fluorosulfonylimide salt and the electrolyte solvent is reduced in pressure and / or heated, A method for producing an electrolyte material characterized by volatilizing a production solvent for a fluorosulfonylimide salt. (In general formula (1), R1 represents fluorine or a fluorinated alkyl group having 1 to 6 carbon atoms, and R2 represents an alkali metal ion) |