Nonaqueous electrolytic solution and energy storage device using same
AssigneeUbe Industries, Ltd.
InventorsKoji Abe, Masahide Kondo
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Abstract
The present invention is to provide a nonaqueous electrolytic solution prepared by dissolving an electrolyte salt in a nonaqueous solvent and an energy storage device, wherein the nonaqueous electrolytic solution includes LiPF2(—OC(═O)—C(═O)O—)2 and at least one kind of a compound having a carbon-carbon triple bond represented by the following general formula (I): (wherein R1 and R2 each independently represent a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms and optionally substituted with a halogen atom; and R3 represents a methyl group or an ethyl group. X represents a hydrogen atom or —CR1R2—OS(═O)2—R3.).
Claims19
A nonaqueous electrolytic solution comprising:
- (i) an electrolyte salt;
- (ii) a nonaqueous solvent, comprising ethylene carbonate, propylene carbonate, or both, in a total amount of 3 to 45 volume % based on the volume of the nonaqueous solvent;
- (iii) LiPF2(—OC(═O)—C(═O)O—)2;
- and
- (iv) at least one compound represented by formula (I):
- wherein R1 and R2 each independently represent a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms and optionally substituted with a halogen atom;
- and R3 represents a methyl group or an ethyl group, X represents a hydrogen atom or —CR1R2—OS(═O)2—R3, and
- wherein a content of LiPF2(—OC(═O)—C(═O)O—)2 is 0.001 to 4 mass % in the nonaqueous electrolytic solution, and a content of the compound represented by the formula (I) is 0.001 to 5 mass % in the nonaqueous electrolytic solution.
Dependencies are inferred from the claim text.