Preparation method for high-nickel ternary positive electrode material

A preparation method for a high-nickel ternary cathode material, comprising the following steps of:

• mixing a LiOH powder with a high-nickel ternary precursor according to a molar ratio of (0.6 to 0.95):1, and performing primary sintering in an oxygen atmosphere to obtain a primary-sintered material;
• adding a metal oxide into a LiOH solution to obtain a mixed solution, wherein the metal oxide is at least one of oxides of Mo, W or Sn;
• mixing the mixed solution with the primary-sintered material in a protective atmosphere to obtain a mixed material, drying and crushing the mixed material to obtain a power material, and performing secondary sintering on the powder material to obtain a secondary-sintered material;
• and
• spraying an atomized boric acid alcohol solution onto the secondary-sintered material, and then tempering to obtain the high-nickel ternary cathode material.