| abstract |
A nonaqueous electrolyte includes a lithium salt, the trifluoropropionate ester of formula (1), and the fluorinated carboxylic acid ester of formula (2). The amount of (1) in the nonaqueous electrolyte is 10 mass% or more. (In the formulae, R1 is a C 1-3 alkyl group, one or two of X1-X4 being fluorine atoms; R2 is a hydrogen atom, a C 1-3 alkyl group, or a fluorinated C 1-3 alkyl group; and R3 is a C 1-3 alkyl group or a fluorinated C 1-3 alkyl group.) |