Non Aqueous Electrolyte And Lithium Secondary Battery Comprising Same

Abstract: The present invention provides a non-aqueous electrolyte comprising a lithium salt, an organic solvent, a compound represented by chemical formula 1 as a first additive, and a compound represented by chemical formula 2 as a second additive. [Chemical formula 1] In chemical formula 1, R1 to R3 are each independently H or -N=C=O, and at least one of R1 to R3 is -N=C=O, and a and b are each an integer of 0 to 4. [Chemical formula 2] In chemical formula 2, R is a substituted or unsubstituted alkylene group of 1 to 3 carbon atoms, and R4 to R6 are each independently H, an alkyl group of 1 to 3 carbon atoms, or a nitrile group. [Chemical formula 3] In chemical formula 3, R7 is an alkylene group of 1 to 8 carbon atoms, and R8 is selected from the group consisting of H, an alkyl group of 1 to 10 carbon atoms, and a cycloalkyl group of 3 to 8 carbon atoms.

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