Patent ID: 9246189
Filing Date: 2016-01-26
CPC Classification: H01M,Y02E,Y02T

Claim Text:
1. A secondary battery comprising a cathode, an anode, and an electrolyte consisting of a lithium salt, a non-aqueous organic solvent, and an electrolyte additive, wherein the electrolyte additive decomposes at 4.5 V or higher to less than 5.5 V vs. reduction voltage of Li + , wherein an amount of the electrolyte additive is in a range of 0.1 to 1 wt % based on a total weight of the electrolyte and the electrolyte additive consists of diacetoxy biphenyl or cyclohexyl benzene, wherein at least one of the cathode and the anode has a surface layer formed by decomposition of the electrolyte additive, and wherein the cathode comprises a spinel-structure lithium metal oxide as a cathode active material is represented by Formula 2 below, wherein 0.9≦x≦1.2 and 0.4≦y≦0.5, and the anode comprises an anode active material represented by Formula 4 below: