Patent ID: 7553588

Claim:
A non-aqueous electrolyte of a lithium secondary battery, comprising: a lithium salt; an organic solvent; and at least one additive compound substantially in an amount of 0.01 to 10 wt %, based on a total weight of electrolyte and selected from the group consisting of compounds represented by the following formula (1): where R 1 and R 2 are independently selected from the group consisting of a hydroxy, a C 1 to C 6 alkoxy, a C 2 to C 6 alkenyl, a C 1 to C 6 alkoxy substituted with a halogen, and a C 2 to C 6 alkenyl substituted with a halogen; and R 3 and R 4 are independently selected from the group consisting of a C 1 to C 6 alkyl and a C 6 to C 12 aryl.