Non-aqueous electrolyte solution containing a first additive of isocyanatobenzonitrile and a second additive and lithium secondary battery including the same
The present disclosure related to a non-aqueous electrolyte solution for a lithium secondary battery, the non-aqueous electrolyte solution comprising: a lithium salt; an organic solvent; and a first additive, wherein the first additive is one or two of compounds represented by following chemical formula 1a and chemical formula 1b:
1 . A non-aqueous electrolyte solution for a lithium secondary battery, the non-aqueous electrolyte solution comprising:
a lithium salt;
an organic solvent;
a first additive; and
a second additive,
wherein the first additive is at least one a compounds represented by chemical formula 1a or chemical formula 1b,
the first additive is contained in an amount of 0.1 to 3 wt % based on a total weight of the electrolyte solution, and
the second additive comprises vinylene carbonate, propane sultone and LiBF 4 :
2 . The non-aqueous electrolyte solution of claim 1 , wherein the first additive is represented by chemical formula 1a.
3 . The non-aqueous electrolyte solution of claim 1 , wherein the second additive is contained in an amount of 0.01 to 10 wt % based on a total weight of the electrolyte solution.
4 . The non-aqueous electrolyte solution of claim 1 , wherein the organic solvent includes at least one of a carbonate compound, an ether compound, an ester compound, a ketone compound, or an alcohol compound.
5 . A lithium secondary battery including: a positive electrode; a negative electrode; a separator; and the non-aqueous electrolyte solution for a lithium secondary battery according to claim 1 .