| abstract |
A battery capable of improving battery characteristics such as battery capacity, cycle characteristics, and storage characteristics is provided. A positive electrode and a negative electrode are provided with a wound electrode body wound around a separator. The capacity of the negative electrode 22 is represented by a sum including a capacity component due to insertion and extraction of Li and a capacity component due to precipitation and dissolution of Li metal. The separator 23 is impregnated with an electrolytic solution in which a Li salt is dissolved in a solvent. Examples of the Li salt include lithium bis [1,2-benzenediolato (2-)-0,0 '] borate and lithium tris [1,2-benzenediolato (2-)-0,0'] phosphate. Having a B—O bond or a P—O bond. The formation of a stable film can suppress the decomposition reaction of the solvent and prevent the reaction between the deposited lithium metal and the solvent. [Selection diagram] Fig. 1 |