| abstract |
The objective of the present invention is to provide: a nonaqueous electrolyte solution which is capable of exhibiting high output characteristics at low temperatures even when a battery has been used to some extent, while exhibiting good high-rate characteristics at room temperature, and which is also capable of enhancing the safety of the battery; and a nonaqueous electrolyte battery.nA nonaqueous electrolyte solution for nonaqueous electrolyte batteries according to the present invention contains: a nonaqueous solvent; an electrolyte which is dissolved in the nonaqueous solvent; (I) a difluoro ionic complex (1); and (II) at least one compound selected from the group consisting of specific cyclic phosphazene compounds, specific siloxane compounds, specific aromatic compounds, specific cyclohexene compounds, specific phosphoric acid ester compounds, specific fluorinated linear ether compounds, specific fluorinated cyclic ether compounds and specific boric acid ester compounds. Not less than 95% by mole of the difluoro ionic complex (1) is a difluoro ionic complex (1-Cis) that has a cis-type steric conformation. |