Microcomposite powder based on flat graphite particles and a...

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 31/04 (2006.01) H01B 1/18 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2473095

The invention concerns a microcomposite powder comprising: flat graphite particles GLP 50 to 1000 mu m wide and 5 to 50 mu m thick consisting of agglomerates of more elementary graphite particles fused and superimposed so that their main planes are mutually parallel, said flat particles being covered with particles of 0.1 to 0.5 mu m of fluoropolymer.

La présente invention concerne une poudre microcomposite comprenant des plaquettes de graphite de 50 à 1000 µm de coté et de 5 à 50 µm d'épaisseur constituées d'agglomérats de particules de graphite plus élémentaires accolées et superposées de façon à ce que leurs plans principaux soient parallèles entre eux, ces plaquettes étant recouvertes de particules de fluoropolymère de taille de l'ordre de 0,1 à 0,5 µm. Cette poudre permet la réalisation de plaques bipolaires de piles à combustible, présentant une conductivité surfacique élevée. Elle permet aussi d'obtenir des éléments d'échange dans des échangeurs de chaleur.

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