Patent ID: 9608290
Date: 2017-03-28
CPC Classifications: H01M,Y02E

Claim:
1. A non-aqueous electrolyte solution comprising: an electrolyte solution additive including lithium difluorophosphate (LiDFP); a vinylene carbonate-based compound; and a sultone-based compound; a non-aqueous organic solvent; and a lithium salt, wherein the amount of the lithium difluorophosphate is in a range of 0.05 wt % to 1 wt % based on the total weight of the electrolyte solution, wherein a weight ratio of lithium difluorophosphate to the vinylene carbonate-based compound is in a range of 1:2.9 to 1:15, and wherein a weight ratio of the vinylene carbonate-based compound to the sultone-based compound is in a range of 1:1 to 6:1; and wherein the total amount of the electrolyte solution additive is 1 wt % to 10 wt % based on the total weight of the electrolyte solution.