| 摘要 |
PROBLEM TO BE SOLVED: To increase the capacity of an alkaline storage battery by obtaining nickel hydroxide active material easy in manufacturing, large in bulk density, excellent in conductivity, and being higher order. SOLUTION: A cobalt compound of average valence of two or less is stuck to positive electrode active material containing nickel hydroxide as a main component. The cobalt compound-stuck positive electrode active material particles by a sticking process are heat treated in the coexistence of alkaline aqueous solution and oxygen so that the cobalt compound is stuck onto the surface of the positive electrode active material particles as a higher order cobalt compound with turbulent crystallinity containing alkaline cation. The positive electrode active material particles are mixed with the alkaline aqueous solution so as to form slurry, and the slurry is electrochemically oxidized so that the nickel hydroxide is formed into the higher order nickel compound of large bulk density. |
