MEMBRANE ELECTRODE ASSEMBLY

摘要

A membrane electrode assembly for a fuel cell. A first and second electrode layer of porous carbon fibre paper has a solid polymer ion exchange membrane therebetween. The membrane is covered and supported by the electrode layers over substantially its entire area and the three layers are bonded together to form a single integral assembly. Sealing grooves are formed in the surfaces of the electrodes opposite the surfaces adjacent the membrane and sealant material is injected into the grooves. The sealant material also becomes integral with the assembly and acts to seal the gases provided to each of the surfaces containing the sealing grooves. Holes to accommodate the gases and water are conterminous and extend through the membrane and electrodes.