abstract |
The non-aqueous electrolyte comprises a lithium salt, a trifluoropropionic acid ester of formula (1), and a fluorinated carboxylic acid ester of formula (2). The amount of (1) in the non-aqueous electrolyte is 10% by mass or more. (Wherein, R 1 is a C 1-3 alkyl group, one or two of X 1 to X 4 are a fluorine atom, R 2 is a hydrogen atom, a C 1-3 alkyl group, or a fluorinated C 1-3 alkyl group, R3 is a C 1-3 alkyl group or a fluorinated C 1-3 alkyl group.) [Chemical formula 1] |