| abstract |
[PROBLEMS] To suppress gas generation in a low temperature environment and a high temperature environment and improve cycle characteristics. An electrolyte comprising a non-aqueous solvent containing at least one of a chain carbonate having a halogen element of Chemical Formula (1) and a cyclic carbonate having a halogen element, and an electrolyte salt containing the compound of Chemical Formula (3). is there. (In the formula, R1 to R6 are a hydrogen group, a halogen group, a halogenated alkyl group, or the like.) Wherein M is a monovalent cation and Y is SO 2 or CO. Z may independently contain a fluorine atom or at least one polymerizable functional group and is perfluorinated. And at least one of Z is a fluorine atom.) [Selection figure] None |