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:
Nov. 28, 2006
Filed:
Dec. 03, 2002
Sandra Wittpahl, Obertshausen, DE;
Markus Robert Vogt, Frankfurt, DE;
Karl-anton Starz, Rodenbach, DE;
Joachim Köhler, Gründau/Haingründau, DE;
Sandra Wittpahl, Obertshausen, DE;
Markus Robert Vogt, Frankfurt, DE;
Karl-Anton Starz, Rodenbach, DE;
Joachim Köhler, Gründau/Haingründau, DE;
Umicore AG & Co. KG, Hanau, DE;
Abstract
The present invention relates to a method for the production of a membrane electrode assembly comprising a polymer electrolyte membrane with two opposing membrane surfaces and a cathode and an anode electrode each comprising a catalyst layer and a gas distribution layer. Each catalyst layer is interposed between a membrane surface and the corresponding gas distribution layer. The catalyst layer of the cathode and/or the catalyst layer of the anode comprise at least two sub-layers. According to the present invention at least one of the sub-layers of the cathode electrode and/or the anode electrode is applied directly to the surface of the membrane while the remaining sub-layers are applied to the corresponding gas distribution layers. Finally the assembly of the coated membrane and the coated gas distribution layers is produced.