Non-aqueous electrolyte for rechargeable lithium battery and rechargeable lithium battery including the same

摘要

According to one aspect of the present invention there is provided a non-aqueous electrolyte for a rechargeable lithium battery comprising: - a lithium sa - a non-aqueous organic solvent including more than 50 wt% of an ester-based solvent based on the total weight of the non-aqueous organic solvent; - a first additive of lithium difluoro(oxalate) borate (LiF 2 OB); and - a second additive selected from the group consisting of tris(trialkylsilyl)phosphate, tris(trialkylsilyl)phosphite, tris(trialkylsilyl)borate, and mixtures thereof.