Manufacturing method of cathode active material precursor for nonaqueous electrolyte secondary battery, cathode active substance precursor for non-aqueous electrolyte secondary battery, and manufacturing method of positive electrode active substance for non-aqueous electrolyte secondary battery

摘要

A positive-electrode active material precursor for a nonaqueous electrolyte secondary battery, contains a nickel-cobalt-manganese carbonate composite represented by a general formula of NixCoyMnzMtCO3 where x+y+z+t=1, 0.05≤x≤0.3, 0.1≤y≤0.4, 0.55≤z≤0.8, and 0≤t≤0.1 are satisfied; and M represents one or more additive elements selected from among Mg, Ca, Al, Ti, V, Cr, Zr, Nb, Mo, and W. The positive-electrode active material precursor includes secondary particles having an average particle diameter greater than or equal to 4 μm and less than or equal to 9 μm. The secondary particle includes a sparse central portion and a dense outer shell portion outside of the central portion, formed of primary particles.