Process for producing a membrane electrode assembly for fuel...

Details Process for producing a membrane electrode assembly for fuel... Process for producing a membrane electrode assembly for fuel...

2006-02-14

2006-02-14

Kalafut, Stephen J. (Department: 1745)

Coating processes

Electrical product produced

Fuel cell part

C427S384000, C427S407100, C502S101000

Reexamination Certificate

active

06998149

ABSTRACT:
A process for producing a membrane electrode assembly for fuel cells containing a polymer electrolyte membrane having a first and a second surface parallel to each other. The first surface forms a firm composite with a first catalyst layer and a first water repellent gas distribution layer and said second surface form a firm composite with a second catalyst layer and a second water repellent gas distribution layer. The catalyst layers are prepared by using inks containing electrocatalysts, one or more solvents, proton-conducting ionomer and optionally water repelling agents and pore-forming agents. In the process the two catalyst layers are applied to or contacted with the respective surfaces of the polymer electrolyte membrane successively, wherein during the application or contacting process to one surface always the opposite surface of the membrane is supported.

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