abstract |
A non-aqueous electrolyte solution having good capacity retention and output retention during cycling is provided. Non-aqueous solvent, hexafluorophosphate (A), compound (B) represented by the following formula (1), and fluorophosphates other than hexafluorophosphate (A), fluorosulfonates, MN(SO 2 F) 2 ( M is an alkali metal) It is based on the non-aqueous electrolyte solution characterized by containing at least 1 sort(s) of salt (C) selected from the group which consists of imide salts and oxalate salts. (In formula (1), any hydrogen atom bonded to a carbon atom may be substituted with a fluorine atom) |