Johnson Matthey Fuel Cells Limited

Gm Global Technolgoy Operations, Inc.

Johnson Matthey Public Limited Company

General Motors LLC

Catherine Helen De Rouffignac

Adam John Hodgkinson

Jonathan David Brereton Sharman

Silvain Buche

Hubert Gasteiger

Susan Yan

Bhaskar Sompalli

Brian A Litteer

Peter Anthony Trew

Susan G Yan

A membrane electrode assembly comprises an ion-conducting membrane; a first electrocatalyst layer having a surface facing the membrane; a first electronically-conducting porous gas diffusion substrate facing the other surface of the first electrocatalyst layer; and a first film member interposed between the membrane and the first electrocatalyst layer. The first electrocatalyst layer has an edge region and a central region, and the first film member contacts the edge region and not the central region. A first adhesive layer is present on the surface of the first film member facing the first electrocatalyst layer, and the first adhesive layer adheres the first film member to the first electrocatalyst layer, impregnates through the first electrocatalyst layer, and impregnates into the first gas diffusion substrate.

Membrane electrode assembly having an adhesive layer impregnating through an electrocatalyst layer and into a first gas diffusion substrate

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.

Sealing of a membrane electrode assembly

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Oxford, United Kingdom

Catherine Helen De Rouffignac