Patent ID: 6998149

Claim:
A process for producing a membrane electrode assembly for fuel cells containing a polymer electrolyte membrane having a first surface and a second surface parallel to each other, said first surface forming a firm composite with a first catalyst layer and a first water repellent gas distribution layer and said second surface forming a firm composite with a second catalyst layer and a second water repellent gas distribution layer, comprising applying said first catalyst layer to or contacting said first catalyst layer with the first surface of the polymer electrolyte membrane and applying said second catalyst layer to or contacting said second catalyst layer with the second surface of the polymer electrolyte membrane successively, wherein during the application or contacting process to one surface, always an opposite surface of the membrane is supported, said catalyst layers being prepared by using an ink containing an electrocatalyst, one at least solvent, proton-conducting ionomer and optionally a water repelling agent and a pore-forming agent.