A single-
crystal-type multi-element positive
electrode material, and a preparation method therefor and an application thereof. The positive
electrode material satisfies the following conditions:
single crystal sizes DPS90, DPS10 and DPS50 of the positive
electrode material, which are measured by means of SEM, satisfying the following relationship: 0.1≤B90=(DPS90-DPS10) / DPS50≤1.5; and the agglomeration rate of the positive
electrode material being less than or equal to 20%, wherein DPS90 represents that 90% of the
single crystal size of the positive
electrode material is less than DPS90, DPS50 represents that 50% of the
single crystal size of the positive
electrode material is less than DPS50, and DPS10 represents that 10% of the single
crystal size of the positive electrode material is less than DPS10. The single-
crystal-type multi-element positive electrode material has rounded morphology, a uniform particle size, less agglomeration, less adhesion, a high compaction density and a good
structural stability, and when same is applied to a
lithium ion battery, the
energy density, rate capability,
cyclic stability and safety of the
lithium ion battery can be improved.