| 摘要 |
A battery capable of improving cycle characteristics is provided. A spirally wound electrode body in which a cathode and an anode are wound with a separator in between is included. An electrolytic solution in which an electrolyte salt is dissolved in a solvent is impregnated in the separator. The electrolytic solution contains a cyclic ester carbonate derivative having halogen atom such as 4-fluoro-1,3-dioxolan-2-one and a light metal salt such as difluoro[oxolate-O,O′]lithium borate, tetrafluoro[oxolate-O,O′]lithium phosphate, and difluoro bis[oxolate-O,O′]lithium phosphate.
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