| abstract |
The invention provides a cathode active material. The cathode active material comprises a lithium titanium oxygen compound the general formula of which is Li3+3xTi6-3x-yMyO12, wherein x is greater than or equal to 0 and less than or equal to 1/3, y is greater than or equal to 0 and less than or equal to 0.25, M comprises one or some of Fe, Al, Ca, Co, B, Cr, Ni, Mg, Zr, Ga, V, Mn and Zn; and the cathode active material also comprises a metallic addition, wherein the metallic addition comprises one or some of Pb, Cd, Zn, Sn, Cu, Mn, Ti, Fe, Mo, Ni, Co, Pd, W and Au. The invention also discloses a preparation method of the cathode active material and a battery using the cathode active material. The cathode active material provided by the invention can effectively solve the problem of battery swelling when lithium titanate materials are used as the cathode active material. |