Ballard Power Systems Corporation

Nisshinbo Holdings Inc.

Bdf IP Holdings Ltd.

Ford Motor Company Limited

Daimler Ag

Kyoung J Bai

Siyu Ye

Dustin William H Banham

Takeaki Kishimoto

Alan Young

Shanna Denine Knights

Scott McDermid

Michael V Lauritzen

Carmen Chuy

Alexander Man-Chung Leung

Paul Beattie

Ping He

David S De Haan

Todd E Wilke

Shannon R Hodgson

Tran Ngo

Ronald Mah

Goran R Vlajnic

Katie Ling Pei

Andrew Leow

Dustin William Banham

Shanna D Knights

A membrane electrode assembly including: an anode electrode; a cathode electrode; and a polymer electrolyte membrane; wherein the cathode includes a first cathode catalyst sublayer including a first precious metal catalyst composition and a first ionomer composition including a first ionomer and a second ionomer; and a second cathode catalyst sublayer including a second precious metal catalyst composition and a second ionomer composition including a third ionomer; wherein the first ionomer is different from the second ionomer in at least one of chemical structure and equivalent weight.

Cathode electrode design for electrochemical fuel cells

A battery cathode, a composition for a catalyst layer of a battery cathode, and a battery, each achieves excellent performance while using a non-platinum catalyst. The battery cathode includes a catalyst layer, wherein the catalyst layer contains a non-platinum catalyst, has a thickness of 15 &#x3bc;m or more, and has a conductance per 1 cmof an electrode area of more than 100 S and less than 350 S.

Battery cathode, composition for battery cathode catalytic layer, and battery

A method for improving the performance and/or stability of non-precious metal catalysts in fuel cells and other electrochemical devices. Improved membrane electrode assemblies (MEAs) and fuel cells containing the same are provided. Such MEAs include a catalyst layer made up of at least two sub-layers containing ionomers of differing equivalent weights. The sub-layers may optionally contain mixtures of ionomers. Also provided are methods of making and using the described devices.

Multi-layer catalyst design

A membrane electrode assembly for a fuel cell, with a membrane, a catalyst layer () and a gas diffusion layer. The catalyst layer () has a first side facing the membrane and a second side facing the gas diffusion layer. In the catalyst layer () an ionomer content increases towards the membrane. The catalyst layer () has a first sublayer () in which catalyst particles () are coated with a first ionomer (). The catalyst layer () further has a second sublayer () with a second ionomer () which is closer to the membrane than the first sublayer (). Pores () are present at least between the coated catalyst particles (). Further, a method for preparing such a membrane electrode assembly, a fuel cell system and a vehicle with a fuel cell system.

Membrane electrode assembly for a fuel cell, method for preparing the membrane electrode assembly, fuel cell system and vehicle

A membrane electrode assembly comprises an anode electrode comprising an anode gas diffusion layer and an anode catalyst layer; a cathode electrode comprising a cathode gas diffusion layer and a cathode catalyst layer; and a polymer electrolyte membrane interposed between the anode catalyst layer and the cathode catalyst layer; wherein the cathode catalyst layer comprises: a first cathode catalyst sublayer adjacent the polymer electrolyte membrane, the first cathode catalyst sublayer comprising a first catalyst supported on a first carbonaceous support and a second catalyst supported on a second carbonaceous support; and a second cathode catalyst sublayer adjacent the cathode gas diffusion layer, the second cathode catalyst sublayer comprising a third catalyst supported on a third carbonaceous support; wherein the first carbonaceous support is carbon black and the second and third carbonaceous supports are graphitized carbon.

Cathode design for electrochemical cells

The present invention is related to methods of making membrane electrode assembly components. The methods include transferring a catalyst layer to a polymer electrolyte membrane or a gas diffusion layer. Methods of making membrane electrode assemblies with these components are also disclosed.

Methods of making components for electrochemical cells

A membrane electrode assembly may be made using a one-sided catalyst coated membrane (CCM) wherein only one catalyst layer, either the anode or the cathode, is coated directly on the ion-exchange membrane. In particular, a one-sided CCM may be used where it may not be practicable to coat both sides of the ion-exchange membrane with catalyst layers such as when PTFE is added to the anode catalyst layer to render it reversal tolerant.

Method of making a membrane electrode assembly for electrochemical fuel cells

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Cranbrook, Canada

Kyoung J Bai