Patent ID: 7968234

Claim:
A lithium secondary battery comprising: a positive electrode including a material that reversibly intercalates/deintercalates lithium ions; a negative electrode comprising a material selected from the group consisting of lithium metal, a lithium-containing alloy, a material that reversibly forms a lithium-containing compound, a material that reversibly intercalates/deintercalates lithium ions, and combinations thereof; and a non-aqueous electrolyte comprising: a lithium salt; an organic solvent; and an additive compound selected from the group consisting of bisphenol A, 2,3-dichloro-1,4-naphthoquinone, and combinations thereof that initiates decomposition at from 4V to 5V and shows a constant current maintenance plateau region of at least 0.5V at measurement of LSV (linear sweep voltammetry), wherein the additive compound is provided in an amount from 0.01 to 10 wt% based on the total weight of the electrolyte.