NONAQUEOUS ELECTROLYTE SOLUTION AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

A nonaqueous electrolyte solution according to one embodiment of the present disclosure contains a lithium salt and a nonaqueous solvent; the nonaqueous solvent contains fluoroethylene carbonate and a chain carboxylic acid ester having a dielectric constant of 6.0 or more; the lithium salt contains LiPOFand LiSOF; and the respective concentrations of LiPOFand LiSOF in the non-aqueous solvent are 0.15 mol/L or more.