| abstract |
PROBLEM TO BE SOLVED: To be used as a positive electrode active material of a non-sintered alkaline battery produced by uniformly coating cobalt hydroxide having a good crystallinity on the particle surface and having a high tap density, for example, by a paste method. Nickel hydroxide powder and a method for producing the same. SOLUTION: It is composed of particles formed by a core of nickel hydroxide and a coating of cobalt hydroxide, and 2.00 g / It is a nickel hydroxide powder having a tap density of at least ml. The above-mentioned powder is added to a suspension of nickel hydroxide powder having a tap density of 2.05 g / ml or more by adjusting the pH of the suspension to a constant value in the range of 10.5 to 13.0 with caustic alkali. While adjusting, while maintaining the atmosphere of the suspension inert, the ammonium ion concentration in the suspension is 7 to It is manufactured by simultaneously supplying an aqueous solution containing cobalt ions and an aqueous solution containing ammonium ions at a constant supply rate so as to be 25 g / l. |