Porous membrane, electrolyte membrane including same, methods of manufacturing both, and fuel cell including at least one of the membranes

A porous membrane with pores that includes a polymerization product of a polyazole-based material, an electrolyte membrane including the porous membrane with a proton-conductive polymer provided in pores of the porous membrane, methods of manufacturing the porous membrane and the electrolyte membrane, and a fuel cell employing at least one of the porous membrane and the electrolyte membrane.