| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel hydroxide active material increasing the charging rate at the time of formation and shortening the forming time by using mainly nickel hydroxide containing oxynickel hydroxide coated with a cobalt compound with a bivalent value or below, and having only the oxynickel hydroxide exist inside the active material. SOLUTION: An active material made mainly of nickel hydroxide contains high-conductivity oxynickel hydroxide in it, and the conductivity of the active material itself is high. The surface is coated with a cobalt compound with a bivalent value or below, and the effect as a conductive material for nickel hydroxide is larger than the case that the cobalt compound is added as a simplex. The conductivity of a positive pole plate using this active material is increased to improve charging efficiency, the occurrence of oxygen gas is suppressed to reduce the rise in a battery internal pressure, the forming time is shortened, and the manufacturing cost is reduced. The quantity of the oxynickel hydroxide existing in the active material is preferably set to 5 wt.% or above with respect to nickel hydroxide. |
