METAL GAS DIFFUSION LAYER FOR FUEL CELLS, AND PRODUCTION METHOD THEREOF

A method for manufacturing a low-cost metal gas diffusion layer for a fuel cell excellent in electron conductivity and water repellency is proposed. The manufacturing method includes step (A) in which a conductive layer of carbon film layer is formed on the metal porous body, and step (B) in which a...

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Bibliographische Detailangaben
1. Verfasser:	AOTANI, Koichiro
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TRANSPORTING
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Beschreibung
Zusammenfassung:	A method for manufacturing a low-cost metal gas diffusion layer for a fuel cell excellent in electron conductivity and water repellency is proposed. The manufacturing method includes step (A) in which a conductive layer of carbon film layer is formed on the metal porous body, and step (B) in which a water-repellent layer is formed on the metal porous body formed with the conductive layer, wherein the step (B) further includes a coating step (B1) in which a solution containing a fluorine resin which constitutes the water-repellent layer (B1) is coated on the metal porous body, and a water-repellent forming step (B2) in which the metal porous body coated with the solution is heat-treated at an evaporation temperature or more of a volatile component which is contained in the solution and which does not constitute the water-repellent layer and less than a destruction temperature of the conductive layer to thereby form the water-repellent layer composed of the fluorine resin.