LITHIUM SECONDARY BATTERY

The present invention relates to a lithium secondary battery including: a non-aqueous electrolyte including a lithium salt, an organic solvent, a first additive represented by Chemical Formula 1 and a second additive represented by Chemical Formula 2; a positive electrode including a positive electrode active material including a lithium composite transition metal oxide having a nickel content of 70 mol% or more among a total transition metal content; a negative electrode including an negative electrode active material; and a separator interposed between the positive electrode and the negative electrode.