Patent ID: 8163426

Claim:
An additive for an electrolyte of a lithium secondary battery, the additive comprising a polysiloxane-based compound represented by Formula 1 below: wherein: R1 and R2 are each independently selected from the group consisting of hydrogen; a halogen group; an oxirane group; an oxetane group; a cyclohexene oxide group; a thiol group; a hydroxyl group; an amino group; —COOH; —C 6 H 4 —OH; —C(═CH 2 )CH 3 ; a C1-C20 alkyl group substituted with hydrogen, a halogen group, an oxirane group, an oxetane group, a cyclohexene oxide group, a thiol group, a hydroxyl group, an amino group, —COOH, —C 6 H 4 —OH, or —C(═CH 2 )CH 3 ; and a C6-C20 aryl group substituted with hydrogen, a halogen group, an oxirane group, an oxetane group, a cyclohexene oxide group, a thiol group, a hydroxyl group, an amino group, —COOH, —C 6 H 4 —OH, or —C(═CH 2 )CH 3 , at least one of R1 and R2 is selected from the group consisting of an oxirane group, an oxetane group, and a cyclohexene oxide group; R3 is a C1-C5 alkyl group; A1 and A2 are each independently a C2-C8 alkylene oxide repeating unit; l and p are real numbers in the range of 1 to 50; m and o are integers in the range of 1 to 10; and n is an integer in the range of 1 and 30.