Patent ID: 8377597

Claim:
A secondary battery comprising: a cathode; an anode; and an electrolytic solution, wherein, the electrolytic solution contains a solvent containing (a) a sulfone compound shown in Chemical formula 1 and (b) at least one of a chain ester carbonate having halogen shown in Chemical formula 2 and (c) a cyclic ester carbonate having halogen shown in Chemical formula 3, where Chemical formula 1 to Chemical formula 3 being: where each of R1 to R4 represent a hydrogen group, a halogen group, an alkyl group, an alkyl halide group, an alkoxy group, or an alkoxy halide group, where each of R11 to R16 represent a hydrogen group, a halogen group, an alkyl group, or an alkyl halide group, at least one of R11 to R16 is the halogen group or the alkyl halide group, and where each of R17 to R20 represent a hydrogen group, a halogen group, an alkyl group, or an alkyl halide group, at least one of R17 to R20 is the halogen group or the alkyl halide group.