LITHIUM SECONDARY BATTERY INCLUDING ELECTROLYTE ADDITIVE FOR LITHIUM SECONDARY BATTERY

Disclosed herein is a lithium secondary battery including: a cathode; an anode; and an electrolyte interposed between the cathode and the anode, the electrolyte including at least one compound (A) represented by Formula 1 below and at least one compound (B) represented by Formula 2 below, and the lithium secondary battery having an operating voltage of 4.45 V or more: For the description of R, Rto R, and Zin Formula 1, refer to the present specification.