Nonaqueous Electrolyte And Lithium Secondary Battery Comprising Same

Abstract: The present invention provides a nonaqueous electrolyte comprising: a lithium salt; an organic solvent; a compound, as a first additive, represented by chemical formula 1; and a compound, as a second additive, represented by chemical formula 2 or chemical formula 3. [Chemical formula 1] In chemical formula 1, R is any one selected from among a C1-C5 perfluoroalkyl group, a C2-C10 alkenyl group, and a C2-C10 alkynyl group. [Chemical formula 2] In chemical formula 2, R1 is a C1-C3 alkylene group that can be substituted with fluorine, and R2 to R4 are each independently any one selected from the group consisting of H, a C1-C3 alkyl group, and a nitrile group. [Chemical formula 3] In chemical formula 3, R5 is a C1-C8 alkylene group that can be substituted with fluorine, and R6 is any one selected from the group consisting of H, a C1-C10 alkyl group, and a C3-C8 cycloalkyl group.

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