Membrane-electrode unit with integrated sealing edge and...

Details Membrane-electrode unit with integrated sealing edge and... Membrane-electrode unit with integrated sealing edge and...

H - Electricity

01

M

H01M 8/02 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2279206

The invention relates to a membrane-electrode unit (1) with an integrated wear ring for fuel cells provided with a polymer electrolyte membrane (2), the anode (3) being mounted on one face thereof and the cathode on the other face (4). The unit (1) is made of a multilayer material containing both anode and cathode material, between which is inserted the material of the polymer electrolyte membrane, from which fragments of appropriate size are separated, while in said fragments, the both sides of the membrane are entirely covered by the electrodes. On the periphery of the fragment is mounted a wear ring (5) in such a way that the latter (5) passes through a peripheral area (6', 7') of at least one electrode (3, 4) and adheres to that membrane portion which is adjacent to the peripheral area, and/or to the front faces of at least one electrode and the membrane.

L'invention porte sur une unité d'électrodes-membranes (1) à collerette d'étanchéité intégrée pour pile à combustible dotée d'une membrane à base d'électrolyte polymérique (2), l'anode (3) étant montée sur une face de la membrane et la cathode (4) sur l'autre face. Cette unité (1) est fabriquée à partir d'un matériau à couches multiples comprenant du matériau anodique et du matériau cathodique entre lesquels est inséré le matériau de la membrane à base d'électrolyte polymérique, dont des fragments de taille appropriée sont séparés, tandis que dans lesdits fragments la membrane est entièrement recouverte, des deux côtés, par les électrodes. Sur le pourtour de l'élément fragmentaire est adaptée une collerette d'étanchéité (5) de telle façon que celle-ci (5) traverse une zone périphérique (6', 7') d'au moins une électrode (3, 4) et adhère à la portion de membrane voisine de la zone périphérique et/ou aux faces frontales d'au moins une électrode et de la membrane.

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