Patent ID: 7008728

Claim:
A lithium secondary battery comprising: a negative electrode comprising a material selected from the group consisting of carbon, carbon composites, lithium metal, and lithium alloys; a positive electrode comprising a material selected from the group consisting of lithium chalcogenides, lithium transition metal oxides, TiS, MoS, organic sulfides, and organic polysulfides; and a non-aqueous liquid electrolyte comprising: a lithium salt; an organic solvent; and a compound represented by Formula (1), wherein the content of the compound ranges from 0.1 to 1 wt %, based on a total weight of the electrolyte: wherein R 1 , R 2 , and R 3 are each independently selected from the group consisting of hydrogen, primary, secondary, and tertiary alkyl groups, alkenyl groups, and aryl groups and wherein the compound forms a film on the negative electrode at initial charging of the battery.