Fuel cell separator and its manufacturing method

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01B 1/24 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2494068

Fuel cell separators (18) sandwich an anode (13) and a cathode (14) which are installed along both sides of an electrolyte film (12) and diffusion layers (15, 16). The separators (18) are made of a mixture material containing a thermoplastic resin selected from ethylene-vinyl acetate copolymers and ethylene-ethyl acrylate copolymers and carbon particles selected from at least one of Ketjenblack, graphite, and acetylene black. Since the thermoplastic resin is excellent in especially flexibility, the contact surfaces of the separators (18) in contact with the diffusion layers (15, 16) can be a portion excellent in sealability by adding the thermoplastic resin excellent in flexibility to the separators (18).

L'invention concerne des séparateurs de piles à combustible (18) prenant en sandwich une anode (13) et une cathode (14) installées sur les deux côtés d'un film électrolytique (12) et des couches de diffusion (15, 16). Ces séparateurs (18) sont constitués d'une matière de mélange contenant une résine thermoplastique choisie parmi des copolymères d'acétate d'éthylène-vinyle et des copolymères d'acrylate d'éthylène-éthyle ainsi que des particules de carbone choisies parmi du Ketjenblack, du graphite et du noir d'acétylène. Etant donné que la résine thermoplastique présente notamment une souplesse élevée, les surfaces de contact des séparateurs (18) en contact avec les couches de diffusion (15, 16) peuvent former une partie présentant une haute capacité d'adhérence grâce à l'ajout de cette résine thermoplastique à souplesse élevée aux séparateurs (18).

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