NON-AQUEOUS ELECTROLYTE AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME

摘要

Provided are a non-aqueous electrolyte, which includes an organic solvent, a lithium salt, and a phosphorus compound including an acryloyloxy group, and a lithium secondary battery including the non-aqueous electrolyte. Since the non-aqueous electrolyte includes the phosphorus compound to form a stable solid electrolyte interface (SEI) on an electrode during charge and discharge of the battery, initial capacity and power characteristics at room temperature and low temperature as well as lifetime characteristics of the battery may be improved.

主权项

1. A non-aqueous electrolyte comprising:
an organic solvent; a lithium salt; and a phosphorus compound of Formula 1, wherein, in Formula 1, X1 and X2 are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R is selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, a hydroxyl group, and an alkoxy group having 1 to 20 carbon atoms, m is an integer of 0 to 29, and n is an integer of 1 or 2.