Patent ID: 9590273
Date: 2017-03-07
CPC Classifications: H01M,Y02E

Claim:
1. A non-aqueous electrolyte solution comprising: i) lithium bis(fluorosulfonyl)imide (LiFSI); ii) a lithium salt; iii) an electrolyte solution additive including a vinylene carbonate-based compound and a sultone-based compound; and iv) a non-aqueous organic solvent, wherein a mixing ratio of the lithium salt to the lithium bis(fluorosulfonyl)imide is in a range of 1:6 to 1:9 as a molar ratio, wherein the non-aqueous organic solvent is selected from the group consisting of linear carbonate, cyclic carbonate, ether, ketone, and mixtures thereof, wherein an amount of the vinylene carbonate-based compound is in a range of 0.1 wt % to 5 wt % based on the total weight of the electrolyte solution, and wherein an amount of the sultone-based compound is in a range of 0.01 wt % to 5 wt % based on the total weight of the electrolyte solution.