KRAUSE, Kevin; GARCIA, Marine; MICHAU, Dominique; CLISSON, Gérald; BILLINGHURST, Brant; BATTAGLIA, Jean-Luc; CHEVALIER, Stéphane

doi:10.1039/d3lc00380a

KRAUSE, Kevin
Institut de Mécanique et d'Ingénierie [I2M]

GARCIA, Marine
Institut de Mécanique et d'Ingénierie [I2M]

MICHAU, Dominique

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Article de revue

Ce document a été publié dans

Lab on a Chip. 2023, vol. 23, n° 18, p. 4002 - 4009

Résumé en anglais

Polymer electrolyte membrane (PEM) electrolyzers are renewable energy storage systems that produce high purity hydrogen fuel from electrochemical water splitting. The PEM in particular is a key component that acts as a solid electrolyte between electrodes and separates the reactants, but despite these benefits, its internal ion transport mechanisms are not fully understood. Here, the first microfluidic PEM electrolyzer that is semi-transparent in the infrared (IR) spectrum is developed as a platform for characterizing the PEM hydration during operation. The electrochemical performance of the chip is compared to its PEM hydration, which is measured via synchrotron Fourier-transform infrared (FTIR) spectroscopy. The PEM water content is directly probed in the operating electrolyzer by measuring the transmitted light intensity at wavelengths around 10 ?m. By supplying the electrolyzer with reactant starving flow rates, mass transport driven cell failure is provoked, which coincides with membrane dehydration. Furthermore, higher operating temperatures are observed to improve the stability in membrane hydration through increasing the membrane water uptake. The methods presented here prove the viability of IR techniques for characterizing membrane hydration, and future extension towards imaging and thermography would enable further quantitative studies of internal membrane transport behaviors. © 2023 The Royal Society of Chemistry.< Réduire

URI

https://oskar-bordeaux.fr/handle/20.500.12278/188190

DOI

http://dx.doi.org/10.1039/d3lc00380a

Project ANR

IMagerie Multiphysique des Piles A Combustible microfluidiques - ANR-20-CE05-0018

Unités de recherche

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295

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Probing membrane hydration in microfluidic polymer electrolyte membrane electrolyzers <i>via</i> operando synchrotron Fourier-transform infrared spectroscopy

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Résumé en anglais

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DOI

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Unités de recherche