Fabrication of membrane-electrode assembly (MEA) comprising a polymer-electrolyte membrane (PEM) with reaction layers on both sides, includes introducing ions of catalytic component(s) into PEM and/or into an ionomer introduced in the reaction layers, appl...

The present invention provides a steel sheet material used for a positive electrode can and a positive electrode can for an alkaline manganese battery capable of improving the battery characteristics for an alkaline manganese battery, characterized in that...