EDGE-PROTECTED CATALYST-COATED DIFFUSION MEDIA AND MEMBRANE ELECTRODE ASSEMBLIES

A fuel cell including an anode-side catalyst coated diffusion medium and a cathode-side catalyst coated diffusion medium that sandwich an ionically conductive membrane. A sealing material is disposed between the ionically conductive membrane and the anode-side and cathode-side catalyst coated diffus...

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Main Authors YAN, SUSAN, G, LITTEER, BRIAN, A, GASTEIGER, HUBERT, A, SOMPALLI, BHASKAR
Format Patent
LanguageEnglish
French
Published 02.03.2006
Edition7
Subjects
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Abstract A fuel cell including an anode-side catalyst coated diffusion medium and a cathode-side catalyst coated diffusion medium that sandwich an ionically conductive membrane. A sealing material is disposed between the ionically conductive membrane and the anode-side and cathode-side catalyst coated diffusion medium, wherein the sealing material is formed of a material that has a permeability that is less than a permeability of the ionically conductive member. The sealing material may also be formed of a material that is softer than the ionically conductive membrane such that the sealing material may deform and enable an membrane electrode assembly of the fuel cell to be subjected to uniform pressures throughout the assembly. Cette invention a pour objet une pile à combustible incluant un support de diffusion enrobé de catalyseur de côté anodique et un support de diffusion enrobé de catalyseur de côté cathodique renfermant une membrane conductrice d'ions. Une substance d'étanchéité est disposée entre la membrane conductrice d'ions et les supports de diffusion enrobés de catalyseur de côté anodique et de côté cathodique, au sein desquels la substance d'étanchéité est composée d'un matériau dont la perméabilité est inférieure à celle de l'élément conducteur d'ions. Cette substance d'étanchéité peut également être composée d'un matériau plus souple que la membrane conductrice d'ions, de telle manière que la substance d'étanchéité peut être déformée et permettre à l'assemblage électrode-membrane de la pile à combustion de supporter des pressions exercées uniformément tout le long de l'assemblage.
AbstractList A fuel cell including an anode-side catalyst coated diffusion medium and a cathode-side catalyst coated diffusion medium that sandwich an ionically conductive membrane. A sealing material is disposed between the ionically conductive membrane and the anode-side and cathode-side catalyst coated diffusion medium, wherein the sealing material is formed of a material that has a permeability that is less than a permeability of the ionically conductive member. The sealing material may also be formed of a material that is softer than the ionically conductive membrane such that the sealing material may deform and enable an membrane electrode assembly of the fuel cell to be subjected to uniform pressures throughout the assembly. Cette invention a pour objet une pile à combustible incluant un support de diffusion enrobé de catalyseur de côté anodique et un support de diffusion enrobé de catalyseur de côté cathodique renfermant une membrane conductrice d'ions. Une substance d'étanchéité est disposée entre la membrane conductrice d'ions et les supports de diffusion enrobés de catalyseur de côté anodique et de côté cathodique, au sein desquels la substance d'étanchéité est composée d'un matériau dont la perméabilité est inférieure à celle de l'élément conducteur d'ions. Cette substance d'étanchéité peut également être composée d'un matériau plus souple que la membrane conductrice d'ions, de telle manière que la substance d'étanchéité peut être déformée et permettre à l'assemblage électrode-membrane de la pile à combustion de supporter des pressions exercées uniformément tout le long de l'assemblage.
Author SOMPALLI, BHASKAR
LITTEER, BRIAN, A
GASTEIGER, HUBERT, A
YAN, SUSAN, G
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Snippet A fuel cell including an anode-side catalyst coated diffusion medium and a cathode-side catalyst coated diffusion medium that sandwich an ionically conductive...
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SubjectTerms BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Title EDGE-PROTECTED CATALYST-COATED DIFFUSION MEDIA AND MEMBRANE ELECTRODE ASSEMBLIES
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