| abstract |
An object of the present invention is to provide a lithium secondary battery excellent in long-term storage stability at high temperatures. A lithium secondary battery comprising a positive electrode containing a positive electrode active material capable of occluding and releasing lithium ions, a negative electrode containing a negative electrode active material capable of occluding and releasing lithium ions, and a non-aqueous electrolyte. , The non-aqueous electrolyte includes an electrolyte (1), an ionic compound having a carbonyl group and / or a sulfonyl group, and a solvent, A lithium secondary battery, wherein the remaining ratio of the electrolyte (1) in the nonaqueous electrolytic solution after being stored at 80 ° C. for 7 days is 93% or more. [Selection figure] None |