Electrolytic Solution For Lithium Secondary Battery, And Lithium Secondary Battery Comprising Same

Abstract: Disclosed are an electrolytic solution for a lithium secondary battery, and a lithium secondary battery comprising same, the solution allowing the type and ratio of a salt and a solvent, which are contained in the electrolytic solution, to be controlled so that the thermal stability of a lithium secondary battery comprising a lithium nickel cobalt manganese-based cathode active material can be improved. The electrolytic solution for a lithium secondary battery comprises: a lithium salt comprising a first lithium salt and a second lithium salt; and a solvent, wherein the first lithium salt comprises lithium hexafluorophosphate, and the second lithium salt comprises lithium bis(fluorosulfonyl)imide or lithium bis(trifluorosulfonyl)imide.

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