CATHODE ACTIVE MATERIAL AND PREPARATION METHOD THEREOF, CATHODE PLATE, BATTERY, AND ELECTRICAL DEVICE

Provided are a cathode active material and a preparation method thereof, a cathode plate, a battery, and an electrical device. The cathode active material includes a plurality of primary particles. The equivalent number Nof (003) crystallographic planes and the equivalent number Nof (104) crystallographic planes of the cathode active material satisfy: N*Nranges from 1*10to 3*10; where: Dis an average thickness of crystallites in the cathode active material perpendicular to the (003) crystallographic plane, in nm; dis an interplanar spacing of the (003) crystallographic planes in the crystallites of the cathode active material, in nm; Dis an average thickness of the crystallites in the cathode active material perpendicular to the (104) crystallographic plane, in nm; and dis an interplanar spacing of the (104) crystallographic planes in the crystallites of the cathode active material, in nm.