Fuel cell membranes and catalytic layers

To form an ionomer-based catalytic layer on a porous substrate, a heat source (40) is used to dry an ionomer-con-taining spray (46) so that it does not substantially liquid flow on the substrate (14). The ionomer spray (46) may contain a catalyst. A spray (46) of mixed material for forming the catal...

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Main Authors JEANNE YADLYNE SMALLEY, CHARLES MCKENDRIE V. QUILLIAN, PETER FAGUY, ANDREW T. HUNT, WILLIAM HARM, FRANK C. WITBROD, MARK BATICH, WILLIAM HOOS, PAUL L. SMITH, WILLIAM J DALZELL JR, STEIN LEE
Format Patent
LanguageEnglish
Published 12.01.2005
Edition7
Subjects
APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
ATOMISING APPARATUS
BASIC ELECTRIC ELEMENTS
ELECTRICITY
NOZZLES
PERFORMING OPERATIONS
PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
SPRAYING APPARATUS
SPRAYING OR ATOMISING IN GENERAL
TRANSPORTING
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Summary:To form an ionomer-based catalytic layer on a porous substrate, a heat source (40) is used to dry an ionomer-con-taining spray (46) so that it does not substantially liquid flow on the substrate (14). The ionomer spray (46) may contain a catalyst. A spray (46) of mixed material for forming the catalytic layer is entrained by a gas stream and is heated and directed to a substrate surface (12). For hydrogen/oxygen fuel cells, catalytic material is incorporated into the proton-conducting membrane (56) to convert diffusing oxygen and hydrogen to water to reduce potential loss at the electrodes and maintain hydration of the proton-conducting membrane (56).
Bibliography:Application Number: GB20040022467