Aluminum-doped cathode material precursor, and preparation method therefor and use thereof

Abstract

The present disclosure discloses an aluminum-doped cathode material precursor, and a preparation method therefor and use thereof. The preparation method includes: adding a solution of mixed salts of nickel, cobalt, and calcium, a first aluminum-containing alkali solution, aqueous ammonia, and a sodium hydroxide solution to a medium solution to allow a reaction, and subjecting a resulting reaction product to solid-liquid separation (SLS) to obtain a filter cake; soaking the filter cake in a second aluminum-containing alkali solution, and conducting SLS to obtain a solid material; subjecting the solid material to calcination to obtain a calcined material, and soaking the calcined material in water to obtain the aluminum-doped cathode material precursor. The precursor of the present disclosure realizes the co-precipitation of nickel, cobalt, and aluminum, and by adopting subsequent dechlorination, decalcification, and dehydration, a material with a porous structure is gradually formed which has a low tap density.