Membrane-electrode assembly having a multicomponent sealing rim

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2641127

The invention relates to a membrane-electrode assembly having a multicomponent sealing rim, with the rim components being joined by means of two different joining methods. The rim construction of the membrane-electrode assembly comprises at least two materials (sealing material A and frame B) which are joined to one another both by adhesion and by physical locking. The frame B has at least one perforation through which the sealing material penetrates and establishes an intermeshing connection. Adhesive bonding methods, lamination processes and/or injection moulding processes are suitable for producing the multicomponent rim and the corresponding membrane- electrode assembly. The multicomponent rim construction has a high bond strength. The membrane- electrode assembly having a multicomponent rim is used in electrochemical devices such as fuel cells (PEMFCs, DMFCs, etc.), electrolysers or electrochemical sensors.

L'invention concerne un ensemble électrode à membrane ayant un bord d'étanchéité à composants multiples, les composants de bord étant assemblés au moyen de deux procédés d'assemblage différents. La construction du bord de l'ensemble électrode à membrane comprend au moins deux matériaux (un matériau d'étanchéité A et un cadre B) qui sont assemblés l'un à l'autre à la fois par collage et par verrouillage physique. Le cadre B a au moins une perforation à travers laquelle le matériau d'étanchéité pénètre et établit une liaison d'enchevêtrement. Des procédés de collage d'adhésifs, des processus de stratification et/ou des processus de moulage par injection sont adéquats pour produire le bord à composants multiples et l'ensemble électrode à membrane correspondant. La construction du bord à composants multiples a une résistance d'adhésion élevée. L'ensemble électrode à membrane ayant un bord à composants multiples est utilisé dans des dispositifs électrochimiques tels que des piles à combustible (PEMFCs, DMFCs, etc.), des électrolyseurs ou des capteurs électrochimiques.

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