Membrane electrode assemblies for PEM fuel cells

The invention relates to Membrane Electrode Assemblies ("MEAs") for solid-polymer-electrolyte proton-conducting membrane fuel cells ("PEM-FCs") having better performance and improved durability, in particular when operated under severe electrochemical conditions such as fuel star...

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Bibliographic Details
Main Authors Zandona, Nicola, Dr, Binder, Matthias, Suchsland, Jens-Peter, Dr
Format Patent
LanguageEnglish
French
German
Published 25.11.2020
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:The invention relates to Membrane Electrode Assemblies ("MEAs") for solid-polymer-electrolyte proton-conducting membrane fuel cells ("PEM-FCs") having better performance and improved durability, in particular when operated under severe electrochemical conditions such as fuel starvation and start-up/shut-down cycling. The MEAs are characterized in that at least one of its two electrode layers (EL1 and/or EL2) contains a first electrocatalyst (EC1) comprising an iridium oxide component in combination with at least one other inorganic oxide component and a second electrocatalyst (EC2/EC2'), which is free from iridium. Preferably, an iridium oxide/titania catalyst is employed as EC 1. The MEAs reveal better performance, in particular when operated under severe operating conditions such as fuel starvation and start-up/shut-down cycling.
Bibliography:Application Number: EP20100016032