DIAPHRAGM FOR ALKALINE WATER ELECTROLYSIS, ALKALINE WATER ELECTROLYSIS APPARATUS, METHOD FOR PRODUCING HYDROGEN, AND METHOD FOR PRODUCING DIAPHRAGM FOR ALKALINE WATER ELECTROLYSIS

摘要

A diaphragm for alkaline water electrolysis according to the present invention is provided with a polymeric porous membrane including a polymeric resin and hydrophilic inorganic particles. The porosity of the polymeric porous membrane is at least 30%, but not more than 60%. The average pore size of both surfaces of the polymeric porous membrane is at least 0.5 µm, but not more than 2.0 µm. The ratio (mode particle size/average pore size) of the mode particle size of the hydrophilic inorganic particles to the average pore size of the polymeric porous membrane is at least 2.0.