Gm Global Technolgoy Operations, Inc.

Other

Asahi Glass Company, Limited

Johnson Matthey Fuel Cells Limited

Johnson Matthey Public Limited Company

General Motors LLC

Hubert Gasteiger

Susan Yan

Bhaskar Sompalli

Brian A Litteer

Steven G Goebel

John P Salvador

Jingxin Zhang

Wenbin Gu

Paul Taichiang Yu

Annette Brenner

Jeffrey Allan Rock

Balasubramanian Lakshmanan

Glenn William Skala

Hiroshi Shimoda

Mark F Mathias

Gary M Robb

Chunxin Ji

Pinkhas A Rapaport

Yan Zhang

Thomas A Greszler

Andrew D Bosco

Lesley A Paine

Youssef Morcos Mikhail

Gerald W Fly

Gayatri Vyas

Matthew J Beutel

Toshihiro Tanuma

Seigo Kotera

Michael Scozzafava

Han Liu

Frederick T Wagner

Shinji Terazono

Shinji Kinoshita

Hirokazu Wakabayashi

John P Healy

Jeanette E O'Hara

James A Leistra

Ilona Busenbender

Adam John Hodgkinson

Matthew M Fay

Kohta Yamada

Catherine Helen De Rouffignac

Peter Anthony Trew

Atsuo Okawara

Sompalli Bhaskar

A fuel cell system including a fuel cell stack having a plurality of fuel cells, each of the fuel cells including an electrolyte membrane disposed between an anode and a cathode, an anode supply manifold in fluid communication with the anodes of the fuel cells, the anode supply manifold providing fluid communication between a source of hydrogen and the anodes, an anode exhaust manifold in fluid communication with the anodes of the fuel cells, and a fan in fluid communication with the anodes of the fuel cells, wherein the fan controls a flow of fluid through the anodes of the fuel cells after the fuel cell system is shutdown.

Shutdown strategy to avoid carbon corrosion due to slow hydrogen/air intrusion rates

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

One embodiment of the invention includes a method including providing a cathode catalyst ink comprising a first catalyst, an oxygen evolution reaction catalyst, and a solvent; and depositing the cathode catalyst ink on one of a polymer electrolyte membrane, a gas diffusion medium layer, or a decal backing.

Electrodes containing oxygen evolution reaction catalysts

A process comprising: providing a substrate with a catalyst layer thereon; depositing a first ionomer overcoat layer over the catalyst layer, the first ionomer overcoat layer comprising an ionomer and a first solvent; drying the first ionomer overcoat layer to provide a first electrode ionomer overcoat layer; depositing a second ionomer overcoat layer over the first electrode ionomer overcoat layer, and wherein the second ionomer overcoat layer comprises an ionomer and a second solvent.

Method of making fuel cell components including a catalyst layer and a plurality of ionomer overcoat layers

An MEA for a fuel cell that employs multiple catalyst layers to reduce the hydrogen and/or oxygen partial pressure at the membrane so as to reduce the fluoride release rate from the membrane and reduce membrane degradation. An anode side multi-layer catalyst configuration is positioned at the anode side of the MEA membrane. The anode side multi-layer catalyst configuration includes an anode side under layer positioned against the membrane and including a catalyst, an anode side middle layer positioned against the anode side under layer and not including a catalyst and an anode side catalyst layer positioned against the anode side middle layer and opposite to the anode side under layer and including a catalyst, where the amount of catalyst in the anode side catalyst layer is greater than the amount of catalyst in the anode side under layer.

Mitigation of membrane degradation by multilayer electrode

A membrane humidifier for a fuel cell with a wet side plate having a plurality of flow channels formed therein and a dry side plate having a plurality of flow channels formed therein, the flow channels of the wet side plate adapted to facilitate a flow of a wet gas therethrough and the flow channels of said dry side plate adapted to facilitate a flow of a dry gas therethrough, wherein a pressure drop in the humidifier is minimized and a humidification of a proton exchange membrane in the fuel cell is optimized.

Membrane humidifier for a fuel cell

A product includes a fuel cell stack, and an enclosure apparatus sealingly enclosing the fuel cell stack to define a hydrogen chamber between the fuel cell stack and the enclosure apparatus. An operation of the product may include maintaining a positive pressure of hydrogen in the hydrogen chamber.

Hydrogen chamber enclosed fuel cell stack and related fuel cell shutdown operation

A fuel cell including an anode-side catalyst coated diffusion medium and a cathode-side catalyst coated diffusion medium that sandwich an ionically conductive membrane. A sealing material is disposed between the ionically conductive membrane and the anode-side and cathode-side catalyst coated diffusion medium, wherein the sealing material is formed of a material that has a permeability that is less than a permeability of the ionically conductive member. The sealing material may also be formed of a material that is softer than the ionically conductive membrane such that the sealing material may deform and enable an membrane electrode assembly of the fuel cell to be subjected to uniform pressures throughout the assembly.

Edge-protected catalyst-coated diffusion media and membrane electrode assemblies

A fuel cell including an anode-side catalyst coated membrane and a cathode-side catalyst coated membrane. At least a portion of a reduced-permeability layer is disposed between the ionically conductive membrane and the anode-side and cathode-side gas diffusion media, wherein the reduced-permeability layer is formed of a material that has a permeability that is less than a permeability of the ionically conductive member. The reduced-permeability layer may also be formed of a material that is softer than the ionically conductive membrane.

Edge-protected catalyst-coated membrane electrode assemblies

In one aspect a substrate such as a sheet metal product, in particular for use as a bipolar plate in a fuel cell or in an electrolyzer, is characterized in that it has, on at least one side, a conductive and corrosion-resistant protective coating of a metal oxide having a treatment which ensures the conductivity. The coating can be produced by introducing a piece of sheet metal into a coating plant and providing it with the conductive and corrosion-resistant protective coating of the metal oxide. In another aspect, an electrochemical cell such as a fuel cell comprises an electrically conductive contact element having a first surface facing an electrode for conducting electrical current, and the contact element comprises an electrically conductive substrate and an electrically conductive coating comprising a doped metal oxide, desirably a doped tin oxide, and preferably a fluorine doped tin oxide.

Electrical contact element and bipolar plate

A fuel cell comprising an ionically conductive membrane with an electrode. The electrode is disposed adjacent the ionically conductive membrane and an electrically conductive member is disposed adjacent the electrode. The fuel cell further comprises a group of catalyzed particles that is capable of catalyzing a gas phase oxidation reaction and an electrochemical oxidation reaction. The catalyzed particles are disposed on at least one of the electrode and electrically conductive member.

MEA with catalyst for oxidation of carbon monoxide

A membrane humidifier for a fuel cell is disclosed, wherein a pressure drop in the humidifier is minimized and a humidification of a proton exchange membrane in the fuel cell is optimized.

A process comprising: depositing a liquid bonding layer comprising an ionomer and a solvent over a carrier film; placing a decal substrate over the liquid bonding layer and drying the liquid bonding layer to provide a solid bonding layer comprising the ionomer, and the solid bonding layer bonding the decal substrate and carrier film together.

Method of laminating a decal to a carrier film

A membrane electrode assembly comprising an ionically conductive member and an electrode, wherein the electrode is a smooth, continuous layer that completely covers and supports the ionically conductive member. The electrode further comprises a central region and a peripheral region, wherein a gradient of electrochemically active material exists between the central region and the peripheral region such that a content of the electrochemically active material is greater in the central region than the peripheral region.

Catalyst layer edge protection for enhanced MEA durability in PEM fuel cells

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Rochester, NY, United States of America

Hubert Gasteiger