Diaphragm for alkaline water electrolysis, alkaline water electrolysis device, method for producing hydrogen, and method for producing diaphragm for alkaline water electrolysis

Abstract

The diaphragm for alkaline water electrolysis according to the present invention comprises a porous polymer membrane, the porous polymer membrane comprising a polymer resin and hydrophilic inorganic particles. A porosity of the porous polymer membrane is 30% or more and 60% or less, average pore sizes at both surfaces of the porous polymer membrane is 0.5 μm or more and 2.0 μm or less, and a ratio of a mode particle size of the hydrophilic inorganic particles to the average pore size of the porous polymer membrane (mode particle size/average pore size) is 2.0 or more.

Dependencies are inferred from the claim text.