The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2005
Filed:
May. 15, 2002
Joachim Köhler, Gründau/Haingründau, DE;
Anita Krämer, Neuberg, DE;
Karl-anton Starz, Rodenbach, DE;
Knut Fehl, Schlüchtern-Ramholz, DE;
Armin Bayer, Freigericht, DE;
Joachim Köhler, Gründau/Haingründau, DE;
Anita Krämer, Neuberg, DE;
Karl-Anton Starz, Rodenbach, DE;
Knut Fehl, Schlüchtern-Ramholz, DE;
Armin Bayer, Freigericht, DE;
Umicore AG & Co. KG, Hanau, DE;
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.