| 摘要 |
The object of the present exemplary embodiment is to provide a non-aqueous secondary battery effectively in which the decomposition of an electrolyte liquid is effectively reduced even under high-voltage and high-temperature condition, and which is excellent in the long-term cycle property. The present exemplary embodiment is a non-aqueous secondary battery including an electrolyte liquid including a supporting salt and a non-aqueous electrolyte solvent, wherein the non-aqueous electrolyte solvent includes a sulfone compound represented by a predetermined formula and a fluorine-containing ester compound represented by a predetermined formula; a content of the sulfone compound in the non-aqueous electrolyte solvent is 20 vol % or more and 70 vol % or less; and a content of the fluorine-containing ester compound in the non-aqueous electrolyte solvent is 20 vol % or more and 60 vol % or less. |
