Lithium Secondary Battery Electrolyte and Lithium Secondary Battery Comprising Same

摘要

Provided are a lithium secondary battery electrolyte and a lithium secondary battery. The lithium secondary battery electrolyte includes a lithium salt, non-aqueous organic solvent, and an oxalate derivative. The lithium secondary battery includes a cathode, an anode, a separator, and the lithium secondary battery electrolyte. The lithium secondary battery electrolyte has excellent high-temperature stability, a high discharge capacity at a low temperature, and excellent lifespan characteristics.

主权项

1. A secondary battery electrolyte comprising:
a lithium salt; a non-aqueous organic solvent; and an oxalate derivative represented by Chemical Formula 1 below: in Chemical Formula 1, R1 is (C1-C10)alkyl substituted with at least one fluorine; and R2 is trifluoromethyl, (C1-C10)alkyl, or (C6-C12)ar(C1-C10)alkyl, wherein the alkyl and aralkyl of R2 may be further substituted with halogen or (C1-C10)alkyl.