Lithium-ion rechargeable battery

Abstract

The present invention relates to a lithium secondary battery comprising a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode active material, the positive electrode active material comprises a lithium nickel-based oxide represented by a specific chemical formula, and the non-aqueous electrolyte comprises a lithium salt, an organic solvent, a first additive, and a second additive, the first additive comprises a compound represented by a specific chemical formula, and the second additive comprises a compound represented by a specific chemical formula.

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