Patent ID: 8802291

Claim:
A cathode composite material comprising a cathode active material and a coating layer coated on a surface of the cathode active material, the cathode active material comprises a layered type lithium nickel cobalt manganese oxide, the coating layer comprises a lithium metal oxide having a crystal structure that belongs to C2/c space group of the monoclinic crystal system, wherein a general formula of the lithium metal oxide is [Li 1-2a M a □ a ][Li 1/3-2b-c M b N 3c A 2/3-2c □ b ]O 2 , wherein A represents a metal element having a +4valence, M and N respectively represent doping chemical elements, “□” represents an atom vacancy occupying a Li site of [Li][Li 1/3 A 2/3 ]O 2 , 0≦2a<1, 0≦2b+c<1/3, and 0≦2c<2/3.