Patent ID: 8062796

Claim:
An organic electrolytic solution comprising: a lithium salt; an organic solvent comprising a first solvent having high permittivity and a second solvent having a low boiling point; and a phosphate compound represented by Formula 2 or 3, wherein the phosphate compound is present in an amount ranging from about 0.5 to about 20 wt % based on the total weight of the organic solvent: where R 1 is selected from the group consisting of unsubstituted alkyl groups having from 1 to 20 carbon atoms, halogen substituted alkyl groups having from 1 to 20 carbon atoms, unsubstituted alkenyl groups having from 2 to 20 carbon atoms, halogen substituted alkenyl groups having from 2 to 20 carbon atoms, unsubstituted aryl groups having from 6 to 30 carbon atoms, halogen substituted aryl groups having from 6 to 30 carbon atoms, halogen substituted aryl groups having from 6 to 30 carbon atoms, unsubstituted heteroaryl groups having from 2 to 30 carbon atoms, and halogen substituted heteroaryl groups having from 2 to 30 carbon atoms, and where each of R 4 , R 5 and R 6 is independently selected from the group consisting of hydrogen atoms, unsubstituted alkyl groups having from 1 to 20 carbon atoms, and alkyl groups having from 1 to 20 carbon atoms in which at least one hydrogen atom is substituted with a halogen atom.