NONAQUEOUS ELECTROLYTE SOLUTION AND NONAQUEOUS ELECTROLYTE BATTERY USING SAME

摘要

A nonaqueous electrolyte solution for a secondary battery that inhibits increases in resistance during high-temperature storage in a charged state and decreases in capacity, as well as a secondary battery that uses this lithium nonaqueous electrolyte solution. A lithium nonaqueous electrolyte secondary battery that incorporates this non-aqeuous electrolyte solution and that demonstrates a favorable overall balance of battery performance with respect to performance such as durability, capacity, resistance and output characteristics.

主权项

1. A nonaqueous electrolyte solution comprising:
an electrolyte, and a nonaqueous solvent, wherein the nonaqueous electrolyte solution contains a compound represented by general formula (A), and (1) at least one compound selected from the group consisting of a nitrile compound, an isocyanate compound, a difluorophosphate, a fluorosulfonate, a lithium bis(fluorosulfonyl)imide, and a compound represented by the following general formula (B), or (2) a cyclic carbonate compound having a fluorine atom in an amount of 0.01% by mass to 50.0% by mass based on the total amount of the nonaqueous electrolyte solution; wherein formula (A) is: wherein R1 to R3 represent optionally substituted organic groups having 1 to 20 carbon atoms; and wherein formula (B) is: wherein R4, R5 and R6 respectively and independently represent an alkyl group, alkenyl group or alkynyl group having 1 to 12 carbon atoms that may be substituted with a halogen atom, and n represents an integer of 0 to 6.