| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a high-purity bisfluorosulfonylimide salt in a non-aqueous system, in which the reaction process is mild, there are no side reactions, post-treatment is simple, and the yield is high. SOLUTION: The production raw material contains at least bisfluorosulfonylimide and M + n X n- , where M is any one selected from the group consisting of Li, Na, K, Rb and Cs. A production method in which X contains an anion of at least one element of B, O, N, P, and Si, and n ≧ 2. [Selection diagram] None |