| abstract |
A secondary battery includes: a cathode; an anode; and an electrolytic solution, in which an open-circuit voltage under a fully-charged state per pair of the cathode and the anode is about 4.3 V or over, and the electrolytic solution includes an unsaturated cyclic ester carbonate represented by an expression (1): n n n n n n n n n n n n where X is a divalent group in which m-number of >C═CR1R2 and n-number of >CR3R4 are bonded in any order, R1 to R4 each are a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, or a monovalent halogenated oxygen-containing hydrocarbon group, any two or more of R1 to R4 may be bonded to one another, and m and n satisfy m≧1 and n≧0, respectively. |