Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery comprising same

A non-aqueous electrolyte solution for a lithium secondary battery, comprising a lithium salt, an organic solvent, and a phosphoric acid-based additive represented by Formula 1:

• wherein, R is each independently selected from the group consisting of hydrogen, halogen, hydroxy, cyano, nitro, substituted or unsubstituted amino, substituted or unsubstituted mercapto, substituted or unsubstituted carbamoyl, substituted or unsubstituted C1-7 alkyl, substituted or unsubstituted C1-7 halogenated alkyl, substituted or unsubstituted C2-7 alkenyl, substituted or unsubstituted C2-7 alkynyl, substituted or unsubstituted C1-7 alkoxy, substituted or unsubstituted C1-4 alkoxy-C1-4 alkoxy, substituted or unsubstituted C6-10 aryl-C1-4 alkoxy, substituted or unsubstituted C2-7 alkenyloxy, substituted or unsubstituted C2-7 alkynyloxy, substituted or unsubstituted C3-7 cycloalkyl, substituted or unsubstituted C3-7 cycloalkenyl, substituted or unsubstituted 3-7 membered heterocycloalkyl, substituted or unsubstituted C3-7 cycloalkyloxy, substituted or unsubstituted C3-7 cycloalkenyloxy, substituted or unsubstituted 3-7 membered heterocycloalkyloxy, substituted or unsubstituted C6-10 aryl, substituted or unsubstituted 5-10 membered heteroaryl, substituted or unsubstituted C6-10 aryloxy, substituted or unsubstituted 5-10 membered heteroaryloxy, substituted or unsubstituted mono- or di-C1-4 alkylamino, substituted or unsubstituted mono-or di-C6-10 arylamino, substituted or unsubstituted C1-4 alkylcarbonylamino, substituted or unsubstituted C1-4 alkylcarbonyl, substituted or unsubstituted C1-4 alkoxycarbonyl, substituted or unsubstituted C2-4 alkenyloxycarbonyl, and substituted or unsubstituted C2-4 alkynyloxycarbonyl, and
• the phosphoric acid-based additive is comprised in an amount of 0.01% by weight to 10% by weight based on a total weight of the non-aqueous electrolyte solution.