Patent ID: 8623558

Claim:
A non-aqueous electrolyte including a non-aqueous solvent and a solute dissolved in said non-aqueous solvent, said non-aqueous solvent consisting of ethylene carbonate, propylene carbonate, diethyl carbonate, and an additive, said additive being at least one of a fluorinated aromatic compound having a molecular weight of 90 to 200 and a fatty acid alkyl ester having a molecular weight of 80 to 240, a weight ratio W EC of said ethylene carbonate being 5 to 30 wt % to the total of said nonaqueous electrolyte, a weight ratio W PC of said propylene carbonate being 15 to 60 wt % to the total of said non-aqueous electrolyte, a weight ratio W DEC of said diethyl carbonate being 10 to 50 wt % to the total of said nonaqueous electrolyte, a weight ratio W LV of said additive being 5 to 35 wt % to the total of said non-aqueous electrolyte, and said fluorinated aromatic compound being at least one selected from the group consisting of fluorobenzene, 1,2-difluorobenzene, 1,2,3-trifluorobenzene, 1,2,3,4-tetrafluorobenzene, pentafluorobenzene, and hexafluorobenzene.