ALKALINE STORAGE BATTERY

The present invention aims to provide an alkaline secondary battery exhibiting superior storage characteristics in a charged state, and exhibiting superior battery capacity recovery characteristics even in an overdischarged state. The object of the present invention can be achieved by an alkaline secondary battery including a positive electrode having active material particles principally made of nickel hydroxide, a negative electrode, and an electrolyte solution, wherein the positive active material particle has a core layer containing nickel hydroxide and a conductive auxiliary layer which coats the surface of the core layer, the conductive auxiliary layer contains a cobalt oxyhydroxide phase and a cerium dioxide phase, and the electrolyte solution is principally made of an aqueous sodium hydroxide solution.