Sealing of a membrane electrode assembly
AssigneeJohnson Matthey Fuel Cells Limited
InventorsSilvain Buche, Adam Hodgkinson, Catherine de Rouffignac, Jonathan David Sharman
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Abstract
A sealed and/or reinforced membrane electrode assembly is disclosed. Encapsulation films, each comprising a backing layer and an adhesive layer, are positioned on the edges of at least one face of each gas diffusion substrate such that the adhesive layers impregnate into each gas diffusion substrate. Methods of forming sealed and/or reinforced membrane electrode assemblies are also disclosed.
Claims25
A membrane electrode assembly comprising a polymer electrolyte membrane, electrocatalyst layers disposed either side of the membrane and gas diffusion substrates contacting each of the electrocatalyst layers, wherein encapsulation films, each comprising a backing layer and an adhesive layer, are positioned on the edges of at least one face of each gas diffusion substrate such that the adhesive layers impregnate into each gas diffusion substrate.
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A gas diffusion substrate wherein an encapsulation film, comprising a backing layer and an adhesive layer, is positioned on the edges of a face of the gas diffusion substrate such that the adhesive layer impregnates into the gas diffusion substrate.
A gas diffusion electrode comprising an electrocatalyst layer deposited on a gas diffusion substrate, wherein an encapsulation film, comprising a backing layer and an adhesive layer, is positioned on the edges of a face of the gas diffusion substrate such that the adhesive layer impregnates into the gas diffusion substrate.
Dependencies are inferred from the claim text.