Influence of Contact Pressure on Hydrogen Crossover and Polarization Behavior in AEM Water Electrolysis

verfasst von: Jan Witte, Patrick Trinke, Boris Bensmann, Maik Becker, Richard Hanke-Rauschenbach, Thomas Turek
Abstract: Anion exchange membrane water electrolysis (AEMWE) holds the potential to become a key technology for future hydrogen production. In the present study, the influence of contact pressure on hydrogen crossover and polarization behavior is systematically investigated in a range from 0.5 MPa to 2.5 MPa in 0.5 MPa increments. The electrodes were prepared as catalyst-coated substrate (CCS), applying 3 mg cm⁻² NiFe₂O₄ on the anode substrate and 0.5 mg cm⁻² Pt on the cathode substrate. It is demonstrated that an elevated contact pressure results in a decreased high frequency resistance (R_HF), while simultaneously leading to a significantly increased hydrogen content on the anode side. At 3 A cm⁻² the ohmic resistance decreases by approx. 30 mΩ cm² when increasing the contact pressure from 0.5 MPa to 2.5 MPa, whereas the anodic hydrogen content increased by approx. 1.5 vol.% respectively. Additionally, it can be observed that the selection of the gas diffusion layer (GDL) material has a strong effect on hydrogen crossover, while the influence on cell voltage is insignificant. Overall, these results show a promising starting point for further investigations on the interactions between cathode properties, cell compression and anodic gas contamination.
Organisationseinheit(en): Institut für Elektrische Energiesysteme
Externe Organisation(en): Technische Universität Clausthal
Typ: Artikel
Journal: Journal of the Electrochemical Society
Band: 172
ISSN: 0013-4651
Publikationsdatum: 13.01.2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Elektronische, optische und magnetische Materialien, Erneuerbare Energien, Nachhaltigkeit und Umwelt, Physik der kondensierten Materie, Oberflächen, Beschichtungen und Folien, Elektrochemie, Werkstoffchemie
Ziele für nachhaltige Entwicklung: SDG 7 – Erschwingliche und saubere Energie
Elektronische Version(en): https://doi.org/10.1149/1945-7111/ad9cce (Zugang: Offen)

BibTeX

@article{59833b4b81494b948f9d041066a825a2,
title = "Influence of Contact Pressure on Hydrogen Crossover and Polarization Behavior in AEM Water Electrolysis",
abstract = "Anion exchange membrane water electrolysis (AEMWE) holds the potential to become a key technology for future hydrogen production. In the present study, the influence of contact pressure on hydrogen crossover and polarization behavior is systematically investigated in a range from 0.5 MPa to 2.5 MPa in 0.5 MPa increments. The electrodes were prepared as catalyst-coated substrate (CCS), applying 3 mg cm−2 NiFe2O4 on the anode substrate and 0.5 mg cm−2 Pt on the cathode substrate. It is demonstrated that an elevated contact pressure results in a decreased high frequency resistance (RHF), while simultaneously leading to a significantly increased hydrogen content on the anode side. At 3 A cm−2 the ohmic resistance decreases by approx. 30 mΩ cm2 when increasing the contact pressure from 0.5 MPa to 2.5 MPa, whereas the anodic hydrogen content increased by approx. 1.5 vol.% respectively. Additionally, it can be observed that the selection of the gas diffusion layer (GDL) material has a strong effect on hydrogen crossover, while the influence on cell voltage is insignificant. Overall, these results show a promising starting point for further investigations on the interactions between cathode properties, cell compression and anodic gas contamination.",
keywords = "anion exchange membrane water electrolysis, contact pressure, hydrogen crossover, polarization curve, proton exchange membrane water electrolysis",
author = "Jan Witte and Patrick Trinke and Boris Bensmann and Maik Becker and Richard Hanke-Rauschenbach and Thomas Turek",
note = "Publisher Copyright: {\textcopyright} 2025 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.",
year = "2025",
month = jan,
day = "13",
doi = "10.1149/1945-7111/ad9cce",
language = "English",
volume = "172",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "1",
}