Graphitized composite article of carbon-fibre-reinforced...

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 35/83 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2193512

The graphitized composite article of the present invention is formed by embedding carbon fiber felt in a matrix of a carbon filler; a thermosetting resin and a solvent; curing the composite article; then, carbonizing and graphitizing the cured composite article to form the graphitized composite article for use as a separator plate (70) capable of substantially inhibiting mixing of hydrogen and oxygen and/or the loss of electrolyte within a fuel cell stack. The graphitized composite article may be a graphitized laminate.

Cette invention concerne un article composite graphitisé que l'on fabrique en effectuant l'enrobage de feutre de fibres de carbone dans une matrice constituée d'un élément de remplissage de carbone, d'une résine thermodurcissable et d'un solvant, puis en cuisant l'article composite, et en procédant enfin à la carbonisation et à la graphitisation dudit article composite précédemment cuit. L'article composite graphitisé ainsi fabriqué peut servir de plaque séparatrice (70) et empêcher pratiquement le mélange d'hydrogène et d'oxygène et/ou la perte d'électrolyte à l'intérieur d'un empilement de cellules électrochimiques. L'article composite graphitisé peut être un stratifié graphitisé.

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