| abstract |
A battery capable of improving cycle characteristics is provided. An electrolytic solution is provided together with a positive electrode and a negative electrode, and a separator provided between the positive electrode and the negative electrode is impregnated with the electrolytic solution. The electrolytic solution contains a solvent, an electrolyte salt, and a sulfone compound having an acid anhydride group (—CO—O—CO—) and a sulfonyl group (—SO 2 —). Since the chemical stability of the electrolytic solution is improved, the decomposition of the electrolytic solution is suppressed. Thereby, cycle characteristics are improved. [Selection] Figure 2 |