Patent ID: 7625670

Claim:
A cathode active material for a non-aqueous electrolyte lithium secondary battery comprising a lithium/nickel/cobalt/manganese complex metal oxide represented by Formula 1: Li a Ni 1−(v+w+x+y+z) Mn v Co w M x M′ y M″ z O 2 (Formula 1) wherein M, M′ and M″ are independently selected from the group consisting of Al, Mg, Sr, Ca, P, Pb, Y, Zr and any combination thereof, a is in the range of 0.9 to 1.05, 1−(v+w+x+y+z) is in the range of 0.685 to 0.745, v is in the range of 0.05 to 0.06, w is in the range of 0.20 to 0.24, and x+y+z is in the range of 0.005 to 0.015.