| abstract |
PROBLEM TO BE SOLVED: To provide a non-aqueous secondary battery that can operate well in a wide temperature range from high temperature to low temperature. A non-aqueous secondary battery of the present invention has a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte containing a lithium salt and an organic solvent, and the non-aqueous electrolyte is the organic The solvent contains a lactone having one substituent at the α-position, the substituent is an alkyl group having 1 to 15 carbon atoms, and the negative electrode is an element that can be alloyed with lithium or An alloy of the element and an element that is not alloyed with lithium is contained as a negative electrode active material. [Selection] Figure 2 |