POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALKALINE STORAGE BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALKALINE STORAGE BATTERY

A positive electrode active material for an alkaline storage battery having excellent over-discharge tolerance and high-temperature tolerance, and a method for producing the positive electrode active material. A positive electrode active material for an alkaline storage battery, containing a hydroxide particle containing at least nickel and solid-solubilized cobalt, and a covering layer containing cobalt, the covering layer covering the hydroxide particle, in which cobalt contained in the covering layer and cobalt contained in the hydroxide particle each have a diffraction peak between diffraction angles of 65° and 66°, the diffraction angles each represented by 2θ in a diffraction pattern obtained by X-ray diffraction measurement.