Metal oxide precursor particle, method for preparing the same and method for preparing cathode active material

Abstract

A metal oxide precursor particle according to the present disclosure has a hollow structure, includes nickel, cobalt and manganese, and has a median particle diameter of 20 to 40 μm. According to a method for preparing metal oxide precursor particles according to the present disclosure, a mixed solution containing water and a metal source including a nickel source, a cobalt source and a manganese source is prepared. The mixed solution is sprayed into a quartz tube. The quartz tube includes a particle formation region therein, and the temperature of the particle formation region is set to 750 to 1100° C. According to a method for preparing a cathode active material of the present disclosure, the metal oxide precursor particles are pulverized to prepare small-sized metal oxide precursor particles. A mixture including the small-sized metal oxide precursor particles and a lithium source is calcined to prepare lithium metal oxide particles.

Dependencies are inferred from the claim text.