Battery

The invention provides a battery, which has a high capacity and can improve battery characteristics such as cycle characteristics. The battery comprises a spirally wound electrode body, wherein a cathode and an anode are wound with a separator in between. The anode includes at least one from the group consisting of simple substances, alloys, and compounds of metal elements or metalloid elements capable of forming an alloy with Li. An electrolytic solution wherein an electrolyte salt is dissolved in a solvent is impregnated in the separator. For the electrolyte salt, a light metallic salt having B-O bond or P-O bond such as difluoro [oxalato-O, O'] lithium borate and tetra fluoro [oxalato-O, O'] lithium phosphate is used. By forming a stable coating, decomposition reaction of the solvent can be inhibited, and reaction between the anode and the solvent can be prevented.