| abstract |
The present invention provides a transition metal composite hydroxide as a precursor of a positive electrode active material for a non-aqueous electrolyte secondary battery and a preparation method thereof, the positive electrode active material for a non-aqueous electrolyte secondary battery and a preparation method thereof, and an active material using the positive electrode. Material non-aqueous electrolyte secondary battery. An object of the present invention is to provide a transition metal composite hydroxide capable of obtaining a lithium transition metal composite oxide having a small particle size and high particle size uniformity as a precursor. A method for preparing a transition metal composite hydroxide, comprising: a composite hydroxide particle preparation process, including the following stages: a nucleation stage for nucleation; a particle growth stage for growing the formed nuclei; and a coating process in the preceding process The surfaces of the obtained composite hydroxide particles are coated with metal oxides or metal hydroxides. |