The invention discloses a high-
nickel ternary positive
electrode material with monocrystal morphology and a preparation method of the high-
nickel ternary positive
electrode material. The preparation method comprises the following steps of (1) mixing a soluble
nickel salt, a soluble
cobalt salt, a soluble
manganese salt, a precipitant and a complexing agent, and performing heating reaction to obtain a precursor; (2) mixing the precursor, a
lithium compound and a
doping metal compound, and
sintering in an
oxygen atmosphere to obtain a base material; (3) mixing the base material and a detergent,performing stirring, centrifuging and
drying, and uniformly mixing with a
coating agent to obtain a coated product; and (4)
sintering the coated product to obtain the high-nickel ternary positive
electrode material with monocrystal morphology. The high-nickel positive
electrode material prepared by the method has morphology similar to that monocrystal, and is high in compaction density and energydensity, low in resided alkali amount and good in processability; and meanwhile, with the introduction of a
doping element, a
lithium ion battery prepared from the high-nickel positive
electrode material has relatively high cycle property, and the cycle property and the safety of the material are also improved by the
coating layer.