REINFORCED ELECTROLYTE MEMBRANE FOR FUEL CELL, PRODUCTION METHOD THEREOF, MEMBRANE ELECTRODE ASSEMBLY FOR FUEL CELL, AND SOLID POLYMER FUEL CELL COMPRISING THE SAME

摘要

Disclosed is a reinforced electrolyte membrane for fuel cells, which is r einforced with a porous membrane. This reinforced electrolyte membrane for f uel cells is characterized in that voids are present in the surface of the p orous membrane and/or the joined portion between the pore surfaces and the e lectrolyte for suppressing swelling at the time when water is absorbed. This reinforced electrolyte membrane for fuel cells enables to improve dimension al stability even when the electrolyte is swelled.