Chemistry: electrical current producing apparatus – product – and – Having earth feature
Reexamination Certificate
2006-12-12
2006-12-12
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Having earth feature
C429S047000, C502S101000
Reexamination Certificate
active
07147959
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.
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Fehl Knut
Köhler Joachim
Krämer Anita
Schaack Klaus
Wittpahl Sandra
Kalafut Stephen J.
Kalow & Springut LLP
Santalone, Esq. John J.
Umicore AG & Co. KG
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