High-nickel multi-element positive electrode material with low internal resistance, preparation method of high-nickel multi-element positive electrode material and lithium ion battery

The invention provides a high-nickel multi-element positive electrode material with low internal resistance, which comprises a plurality of secondary particles formed by gathering primary particles, and the primary particles have a chemical formula as shown in formula I: LiaNi (1-x-y-z) CoxMyAzO2 + e, in the formula I, 0 < = x < = 0.35, 0 < = y < = 0.35, 0 < = z < = 0.10, 0.95 lt; a < lt >; 1.30, 0 < = e < = 0.2, M is Mn and/or Al, and A is one or more of Mg, Ti, B, Ba, Sr, Zr, Y and Na; the surface of the secondary particle contains a strong oxidizing compound, and the strong oxidizing compound contains one or more of Ce, Ag, Bi and Ru elements. The invention also provides a preparation method of the high-nickel multi-element positive electrode material with low internal resistance and a lithium ion battery. 本发明提供了一种低内阻的高镍多元正极材料，包括多个由一次颗粒聚集形成的二次颗粒，所述一次颗粒具有式I所示化学式：LiaNi1-x-y-zCoxMyAzO2+e式I；式I中，0≤x≤0.35、0≤y≤0.35、0≤z≤0.10、0.95