Patent ID: 8435674

Claim:
A lithium battery, comprising: a cathode including at least one cathode active material that discharges oxygen during charging and discharging; an anode; and an organic electrolyte solution including a lithium salt, an organic solvent, and at least one compound selected from the group of compounds represented by Formula 1 and Formula 2, P(R 1 ) a (OR 2 ) b <Formula 1> O═P(R 1 ) a (OR 2 ) b <Formula 2> wherein: in Formulae 1 and 2, R 1 is each independently a substituted or unsubstituted C 1 -C 20 alkyl group or a substituted or unsubstituted C 6 -C 30 aryl group; R 2 is each independently a substituted or unsubstituted C 1 -C 20 alkyl group or a substituted or unsubstituted C 6 -C 30 aryl group; a and b are each independently in a range of about 0 to about 3; a+b=3; if a is equal to or greater than 2, a plurality of R 1 are the same or different; and if b is equal to or greater than 2, a plurality of R 2 are the same or different, and the cathode active material that discharges oxygen during charging and discharging includes at least one compound selected from the group of xLiMO 2 .(1−x)Li 2 M′O 3 in which 0≦x<1, M is at least one metal having an average oxidation number of +3 and is selected from the group of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), aluminum (Al), magnesium (Mg), zirconium (Zr), molybdenum (Mo), and boron (B) and M′ is at least one metal having an average oxidation number of +4 and is selected from the group of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Al, Mg, Zr, Mo, and B, and Li 2 M″O 2 in which M″ is at least one metal selected from the group of Ni, Co, Fe, Cu, Ti, and V.