Electrolyte for lithium secondary battery and lithium secondary battery including the same

An electrolyte for a lithium secondary battery, which includes a lithium salt, a nonaqueous organic solvent and at least one additive selected from the group consisting of vitamin G (vitamin B, riboflavin), vitamin B(niacinamide), vitamin B(adenine), vitamin B(pantothenic acid), vitamin H (vitamin B, biotin), vitamin M (vitamin B, folic acid), vitamin B(4-aminobenzoic acid), vitamin D(ergocalciferol), vitamin D(cholecalciferol), vitamin K(phylloquinone), ascorbyl palmitate, and sodium ascorbate.