Process for producing a membrane electrode assembly and the...

Details Process for producing a membrane electrode assembly and the... Process for producing a membrane electrode assembly and the...

2005-05-17

2005-05-17

Alejandro, Raymond (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S047000, C264S345000

Reexamination Certificate

active

06893761

ABSTRACT:
The invention comprises a process for making a membrane electrode assembly comprising a polymer electrolyte membrane having two opposite faces, on each face of which is applied a catalyst layer and a gas distribution layer. The two gas distribution layers in the membrane electrode assembly are formed by hydrophobized carbon substrates which, using appropriate inks containing at least one catalyst, dissolved ionomer and solvent, are each coated with a catalyst layer and are then laid on opposite faces of the polymer electrolyte membrane with the catalyst layers still in the moist state. Afterwards, a firm bond between electrolyte membrane, catalyst layers and carbon substrates is produced by treating the membrane electrode assembly at elevated temperature under pressure.

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patent: 2052221 (1992-05-01), None
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European Search Report, Dec. 13, 2001.

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