| 摘要 |
PURPOSE: Provided is a more reliable process with which polymer electrolyte membranes, in particular with thicknesses of less than 50 mum, can be processed to give membrane electrode assemblies. CONSTITUTION: The process is to produce a membrane electrode assembly for fuel cells containing a polymer electrolyte membrane having a first and a second surface parallel to each other, wherein said first surface forms a firm composite with a first catalyst layer and a first water repellent gas distribution layer and said second surface forms a firm composite with a second catalyst layer and a second water repellent gas distribution layer. The process comprises applying each of said first catalyst layer and said second catalyst layer to or contacting with the respective surfaces 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. The catalyst layers are 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. |
