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Practical ex-Situ Technique To Measure the Chemical Stability of Anion-Exchange Membranes under Conditions Simulating the Fuel Cell Environment

Müller, Jasmine, Zhegur, Avital, Krewer, Ulrike, Varcoe, John and Dekel, Dario R. (2020) Practical ex-Situ Technique To Measure the Chemical Stability of Anion-Exchange Membranes under Conditions Simulating the Fuel Cell Environment ACS Materials Letters, 2 (2). pp. 168-173.

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Abstract

Anion-exchange membrane (AEM) degradation during fuel cell operation represents the main challenge that hampers the implementation of AEM fuel cells (AEMFCs). Reported degradation values of AEMs are difficult to reproduce as no standard methods are used. The present use of different techniques based on exposure of membranes to aqueous KOH solutions under different conditions and measuring different outputs during time does not allow for a reliable and meaningful comparison of reported degradation data of different AEMs. In this study, we present a practical and reproducible ex-situ technique to measure AEM degradation in conditions that mimic an operando fuel cell environment. In this novel technique, we measure the change of the true hydroxide conductivity of the AEM over time, while exposing it to different relative humidity conditions. The technique does not make use of liquid alkaline solution, thus simulating real fuel cell conditions and providing a good baseline for comparative degradation studies.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
NameEmailORCID
Müller, Jasmine
Zhegur, Avital
Krewer, Ulrike
Varcoe, JohnJ.Varcoe@surrey.ac.uk
Dekel, Dario R.
Date : 7 January 2020
Funders : Engineering and Physical Sciences Research Council (EPSRC), European Union’s Horizon 2020 research and innovation program
DOI : 10.1021/acsmaterialslett.9b00418
Copyright Disclaimer : © 2020 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Depositing User : James Marshall
Date Deposited : 29 Jan 2020 14:29
Last Modified : 23 Jul 2020 08:16
URI: http://epubs.surrey.ac.uk/id/eprint/853474

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