Patent ID: 9406930
Filing Date: 2016-08-02
CPC Classification: C01G,C01P,H01M,Y02E,Y02P

Claim Text:
1. A production method for producing by a crystallization reaction nickel composite hydroxide that is expressed by a general formula (1): Ni x Co y Al z Mn t M s (OH) 2+a (x+y+z+t+s=1, 0≦y≦0.3, 0<z≦0.1, 0.001<t≦0.05, 0≦s≦0.05, 0≦a≦0.5, and M is at least one additional element that is selected from the group comprising Mg, Ca, Ti, V, Cr, Zr, Nb, Mo and W), comprising: a nucleation process controlling a nucleation aqueous solution that includes a metal compound that includes metal elements at a composition ratio that is expressed by a general formula (a): Ni a particle growth process of controlling a particle growth aqueous solution that includes nuclei that were formed in the nucleation process so that the pH value at a reference liquid temperature of 25° C. becomes 10.5 to 12.0, and growing the nuclei with supplying the metal compound and the ammonium ion donor, and, at a time from the start of the particle growth process within a range of 1% to 15% of the total time from the start to end of the particle growth process, switching from the oxidizing atmosphere to a mixed atmosphere of oxygen and inert gas having an oxygen concentration of 1% by volume or less and replacing the supplied metal compound with a metal compound that includes metal elements at a composition ratio that is expressed by a general formula (b): Ni and further comprising a process of coating an aluminum compound on the nickel composite hydroxide that is obtained in the particle growth process, at least in case that aluminum is not included in any of the metal compound that is included in the nucleation aqueous solution and the metal compound that is supplied in the particle growth process.