ELECTROLYTE AND LITHIUM METAL SECONDARY BATTERY COMPRISING SAME

An electrolyte for a lithium metal secondary battery, the electrolyte comprising a lithium salt including lithium bis(fluorosulfonyl)imide, and a non-aqueous solvent including 1,2-(1,1,2,2-tetrafluoroethoxy)ethane; a cyclic fluorinated carbonate; and a solvent containing at least one selected from the group consisting of a chain carbonate, a chain ester, and a chain ether, wherein the 1,2-(1,1,2,2-tetrafluoroethoxy)ethane is contained in an amount of 5% to 30% by volume based on the total volume of the non-aqueous solvent.