Patent ID: 7927506

Claim:
A cathode active material comprising a composite lithium metal oxide represented by Formula 1: xLi 2 MO 3 -yLiMeO 2 -zLi 1+d M′ 2+d O 4 (1) wherein: 0 ≦d≦0.33; 0 <x<1, 0<y<1, 0.01≦z<1 and x+y+z=1; M is selected from the group consisting of Mn, Ti, and combinations thereof; Me is selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Al, Mg, Zr, B and combinations thereof; and M′ is selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Al, Mg, Zr, B and combinations thereof.