METHOD OF MAKING FLUID DIFFUSION LAYERS AND ELECTRODES HAVING REDUCED SURFACE ROUGHNESS

A method of making a fluid diffusion layer comprising a substrate and a loading material adhered to the substrate is provided. The loading material is adhered to the substrate by the steps of applying a first loading composition, comprising a first portion of the loading material to the substrate in...

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Bibliographische Detailangaben
Hauptverfasser:	GORDON, JOHN ROBERT, STUMPER, JURGEN, FONG, KELVIN KEEN-VEN, HAAS, HERWIG ROBERT
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL DRESSING OR CONDITIONING OF ABRADING SURFACES ELECTRICITY FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING METALLURGY PERFORMING OPERATIONS POLISHING 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 OR ATOMISING IN GENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING
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Beschreibung
Zusammenfassung:	A method of making a fluid diffusion layer comprising a substrate and a loading material adhered to the substrate is provided. The loading material is adhered to the substrate by the steps of applying a first loading composition, comprising a first portion of the loading material to the substrate in a first applying step, and applying a second loading composition, comprising a second portion of the loading material to the substrate in a second applying step. The first loading composition and the second loading composition each has a solids content below 20 percent. La présente invention concerne des procédés de fabrication de couches de diffusion fluidique présentant une rugosité de surface réduite. Lesdits procédés employés pour faire adhérer le matériau de charge à la surface du substrat permettent de réduire la rugosité de surface moyenne des couches de diffusion fluidique, et de réduire ainsi les fuites et les dégâts au niveau de membranes d'échange ionique. L'utilisation de couches de diffusion fluidique et d'électrodes présentant une rugosité de surface réduite dans des ensembles d'électrodes à membranes permet d'obtenir une fiabilité et un rendement améliorés. On peut également faire intervenir un procédé de calcul de la rugosité de surface d'une couche de diffusion fluidique.