| abstract |
A battery capable of improving characteristics such as charge / discharge cycle characteristics is provided. A positive electrode and a negative electrode are provided with a wound electrode body wound around a separator. Lithium metal is deposited on the negative electrode 22 during charging, and the capacity of the negative electrode 22 is represented by the sum of a capacity component due to insertion and extraction of lithium and a capacity component due to deposition and dissolution of lithium. The separator 23 is impregnated with an electrolytic solution in which a lithium salt is dissolved in a solvent. The solvent contains at least one member selected from the group consisting of ethylene carbonate, vinylene carbonate, vinyl ethylene carbonate, monofluoroethylene carbonate, and ethylene sulfite in a total amount of 60% by mass or more. The characteristics have been improved. It is preferable that an additive such as benzophenone is added to the electrolytic solution. [Selection diagram] Fig. 1 |