Recycling method of ternary material micropowder, and use thereof

A recycling method of a ternary material micropowder, comprising the following steps:

• S1:
• mixing a ternary material micropowder with water, stirring a resulting mixture for a specified time to obtain a first slurry, and dewatering the first slurry to obtain a micropowder filter cake;
• the ternary material is Li(Ni0.8Co0.1Mn0.1)O2 or Li(Ni0.5Co0.2Mn0.3)O2;
• S2:
• adding water to the micropowder filter cake, and stirring a resulting mixture during which a coating agent and a promotor are added to obtain a second slurry, wherein the promotor is one or more selected from the group consisting of polyimide, polyoxyethylene, polyethyleneimine, polypyrrole, tripolycyanamide, ethylene glycol, triethylamine, polyphenylene ether ketone, and polythiophene;
• S3:
• subjecting the second slurry to a reaction under heating and pressurization, and filtering to obtain a coated base material;
• and
• S4:
• subjecting the coated base material to sintering;
• adding an extracting agent to a resulting sintered material, the extracting agent is one or more selected from the group consisting of ethylene glycol, sec-butyl acetate, kerosene, trioctyl tertiary amine, ethyl acetate, glycerin, N-methylpyrrolidone, and benzene;
• and stirring and filtering to obtain a filter residue;
• and subjecting the filter residue to drying, sieving, and iron removal to obtain a ternary cathode material.