| abstract |
A non-aqueous electrolyte secondary battery having good cycle characteristics and good low-temperature discharge performance even when the cycle progresses is obtained. In a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, lithium bis (oxalato) borate 0.1 to 1 represented by the chemical formula (1) is contained in the non-aqueous electrolyte. 0.0% by mass and 0.2 to 1.5% by mass of an unsaturated sultone compound. [Selection figure] None |