Lyophilic fuel cell component

Details Lyophilic fuel cell component Lyophilic fuel cell component

H - Electricity

01

M

H01M 8/02 (2006.01)

Patent

CA 2524779

A fuel cell component (36) with surfaces having improved lyophilicity so that liquid on the component (36) adheres closely to the surface in relatively flat droplets or sheets. The Iyophilic surfaces may be formed with a thin layer of inherently Iyophilic polymer (38) on the surface of the component (36). The lyophilic surfaces may be selectively provided on critical areas of the component (36), such as for example on flow channel wall surfaces of bipolar plates and membrane electrode assemblies, thereby inhibiting liquid blocking of the flow channels during operation of the fuel cell.

L'invention concerne un composant de pile à combustible comprenant des surfaces possédant une capacité de lyophilisation améliorée permettant au liquide se trouvant sur le composant de bien adhérer à la surface sous forme de gouttes ou de couches relativement plates. Les surfaces Iyophiles peuvent être formées d'une fine couche de polymère essentiellement Iyophile sur la surface du composant. Les surfaces lyophiles peuvent être formées de manière sélective sur des zones critiques du composant, comme par exemple les surfaces des parois des canaux d'écoulement de plaques bipolaires et d'ensembles d'électrodes à membrane, inhibant ainsi le blocage du liquide des canaux d'écoulement au cours de l'utilisation de la pile à combustible.

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