| 主权项 |
1. A nonaqueous electrolyte secondary battery comprising:
a positive electrode including a positive active material; a negative electrode including a negative active material; and a nonaqueous electrolyte containing, as a solvent, at least one member selected from the group consisting of a halogen-containing chain carbonate and a halogen-containing cyclic carbonate, the halogen-containing chain carbonate being at least one member selected from the group consisting of fluoromethyl methyl carbonate, difluoromethyl methyl carbonate and bis(fluoromethyl) carbonate, and the halogen-containing cyclic carbonate being at least one member selected from the group consisting of 4-fluoro-1,3-dioxolan-2-one and 4,5-difluoro-1,3-dioxolan-2-one, wherein an open circuit voltage in a completely charged state per pair of a positive electrode and a negative electrode is from 4.25 to 6.00 V, wherein the positive active material and the negative active material are adjusted in an amount corresponding to the open circuit voltage; and at least one member selected from the group consisting of sulfonic anhydrides represented by the following formulae (1) to (4) is contained in a nonaqueous electrolytic solution, an amount of the sulfonic anhydride in the nonaqueous electrolytic solution ranging from more than 0.5% by mass and not more than 5% by mass, wherein R1 represents an optionally substituted alkylene group having from 2 to 4 carbon atoms, an optionally substituted alkenylene group having from 2 to 4 carbon atoms or an optionally substituted crosslinking ring; and the substituent represents a halogen atom or an alkyl group;wherein each of R3 to R6 independently represents hydrogen, an alkyl group, a halogenated alkyl group or a halogen group and may form a ring each other; wherein R2 represents an optionally substituted alkylene group having from 2 to 4 carbon atoms, an optionally substituted alkenylene group having from 2 to 4 carbon atoms or an optionally substituted crosslinking ring; and the substituent represents a halogen atom or an alkyl group; and wherein each of R7 to R10 independently represents hydrogen, an alkyl group, a halogenated alkyl group or a halogen group and may form a ring each other. |
