Patent ID: 11876177
Assignee: LG ENERGY SOLUTION, LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A non-aqueous electrolyte solution for a lithium secondary battery, consisting of:
a first lithium salt that is lithium bis(fluorosulfonyl)imide (LiFSI);
a second lithium salt excluding the LiFSI;
an organic solvent selected from an ether-based solvent, an ester-based solvent, an amide-based solvent or as a mixture thereof, wherein the ester-based solvent is at least one selected from the group consisting of a cyclic carbonate compound, a linear carbonate compound, an alkyl ether-based compound, an alkyl acetate-based compound, and an alkyl propionate-based compound, and the cyclic carbonate compound is at least one selected from the group consisting of ethylene carbonate (EC), propylene carbonate (PC), 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate, and fluoroethylene carbonate (FEC);
a compound represented by Formula 1; and
optionally, an additive selected from the group consisting of a sultone-based compound, a halogen-substituted carbonate-based compound, a nitrile-based compound, a cyclic sulfite-based compound, and a cyclic carbonate-based compound that is vinyl ethylene carbonate, wherein the sultone-based compound is at least one of 1,3-propane sultone (PS), 1,4-butane sultone, ethene sultone, 1,4-butene, sultone, or 1-methyl-1,3-propene sultone,
wherein a molar ratio of the second lithium salt to the first lithium salt is in a range of 1:1 to 1:2, and
wherein the compound represented by Formula 1 is included in an amount of 0.1 wt % to 7 wt % based on a total amount of the non-aqueous electrolyte solution:, wherein, in Formula 1,
R1 to R3 are each independently hydrogen or an alkyl group having 1 to 6 carbon atoms, and
A is, wherein, R5 is hydrogen, an aryl group having 6 to 8 carbon atoms that is unsubstituted or substituted with at least one fluorine atom, or an alkynyl group having 2 to 6 carbon atoms.