NICKEL POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALKALINE BATTERY AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide a nickel positive electrode active material for an alkaline battery which is superior in utilization factor of the active material and in high-rate discharge, and its manufacturing method. SOLUTION: For a nickel positive electrode active material for an alkaline battery, a first coating layer (an inner layer) formed of a cobalt compound, such as a cobalt hydroxide and a cobalt oxyhydroxide, and a second coating layer (an outer layer) formed of metal nickel or a nickel alloy are formed on the surfaces of nickel hydroxide particles. Such an activated material is obtained by coating the surfaces of the nickel hydroxide particles with the cobalt compound and the metal nickel or the nickel alloy, in this sequence.