| abstract |
The invention relates to the field of lithium ion batteries, and discloses a multi-element positive electrode material, a preparation method thereof, and a lithium ion battery. The multi-component positive electrode material includes a substrate and a fast ion conductor coating layer coated on the surface of the substrate; the components of the fast ion conductor coating layer are Li 7-i A i La 3-j A' j Zr 2-q A" q O 12+δ and Li u J v La 2-w J' w O 4+ω ; A is selected from at least one of Mg, Ca, Al and Ga, and A' is selected from among Sr, Y and Ce At least one, A" is selected from at least one of Zn, Cu, Co, Ge, Hf, Ir, Mn, Mo, Ti, Ru, Se, Te, W, Sn, Sb, Nb and Ta, 0≤i ≤2, 0≤j≤1, 0≤q≤2, 0≤δ≤1, and i, j, k are not 0 at the same time; J is selected from at least among Al, Ni, Co, Mn, Cu and Fe One, J' is selected from at least one of Ca, Ba, Sr, La, Y, Ce, Rb and Ru, 0<u≤1, 0<v≤1, 0≤w≤1, 0≤ω≤ 1. The multi-component material provided by the invention can improve the discharge specific capacity, rate performance, cycle retention rate and safety performance of the lithium ion battery. |