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:
Dec. 12, 2006
Filed:
May. 31, 2002
Joachim Köhler, Gründau/HG, DE;
Knut Fehl, Schlüchtern, DE;
Anita Krämer, Neuberg, DE;
Sandra Wittpahl, Obertshausen, DE;
Klaus Schaack, Obernburg, DE;
Joachim Köhler, Gründau/HG, DE;
Knut Fehl, Schlüchtern, DE;
Anita Krämer, Neuberg, DE;
Sandra Wittpahl, Obertshausen, DE;
Klaus Schaack, Obernburg, DE;
Umicore AG & Co. KG, Hanau, DE;
Abstract
The present invention relates to the field of electrochemical cells and fuel cells, more specifically to polymer-electrolyte-membrane (PEM) fuel cells and describes a process for the manufacture of membrane-electrode-assemblies (MEAs) containing five layers. The five-layer MEA is assembled together by means of a lamination process involving an adhesive component. The anode gas diffusion layer, the catalyst-coated membrane and the cathode gas diffusion layer are combined together by a low temperature/low pressure lamination process. Handling of the MEAs and assembly of the products into PEMFC and DMFC stacks is simplified. Less damage and perforation of the catalyst-coated membrane occurs and thus the performance of the five-layer MEAs is significantly improved.