Patent ID: 8067114
Filing Date: 2011-11-29
Classification: H01M,Y02E

Abstract:
1. A lithium secondary battery comprising a lithium manganese metal oxide as a cathode active material, a non-graphitic carbon material as an anode active material, and a lithium salt-containing non-aqueous electrolyte wherein the electrolyte contains as an additive a salt represented by Formula I in an amount of 0.1 to 20% by weight, based on the total weight of the electrolyte: wherein: R is a C X is nitrogen or phosphorus; Y is boron or phosphorus; X and Y are not identical; Z is a C n is 4 or 6, and is determined by an oxidation number of Y depending upon selection of X and Y; and wherein propylene carbonate or a mixed solvent of propylene carbonate and a linear carbonate is used as a solvent of the electrolyte.