| abstract |
Disclosed are an electrolyte solution which enables to improve high-temperature characteristics, and a battery. A separator (23) is impregnated with an electrolyte solution, and the electrolyte solution contains a solvent including 4,5-difluoro-1,3-dioxolane-2-one. The amount of 4,5-difluoro-1,3-dioxolane-2-one contained therein is preferably within the range from 5% by mass to 50% by mass. When it is used in combination with 4-fluoro-1,3-dioxolane-2-one, the amount of 4,5-difluoro-1,3-dioxolane-2-one contained therein is preferably within the range from 5 ppm by volume to 2000 ppm by volume. |