| abstract |
A cathode active material including a lithium metal oxide composite having a first domain and a second domain and represented by Formula 1:n n x [Li 2-y (M1) 1-z (M2) y+z O 3 ]-(1− x )[LiMeO 2 ] Formula 1n nwhereinn 0<x<1, 0≦y<1, 0≦z<1, 0<y+z<1, M1 includes at least one transition metal, M2 includes at least one metal selected from magnesium (Mg), aluminum (Al), vanadium (V), zinc (Zn), molybdenum (Mo), niobium (Nb), lanthanum (La), and ruthenium (Ru), and Me includes at least one metal selected from nickel (Ni), cobalt (Co), manganese (Mn), iron (Fe), chromium (Cr), titanium (Ti), copper (Cu), aluminum (Al), magnesium (Mg), zirconium (Zr), and boron (B). |