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Investigating Cathode Ionomer Content and Assembly Techniques for Anion Exchange Membrane Water Electrolyzers

Titelangaben

Titheridge, Laura J. ; Sharma, Shailendra ; Soisson, Anouk ; Tiffin, Campbell ; Roth, Christina ; Marshall, Aaron Timothy:
Investigating Cathode Ionomer Content and Assembly Techniques for Anion Exchange Membrane Water Electrolyzers.
In: ACS Electrochemistry. (2025) .
ISSN 2997-0571
DOI: https://doi.org/10.1021/acselectrochem.4c00225

Angaben zu Projekten

Projekttitel:
Offizieller Projekttitel
Projekt-ID
Catalyst Strategic Fund
UOCX2118
Ohne Angabe
FKX 03SF0689B

Projektfinanzierung: Bundesministerium für Bildung und Forschung
New Zealand Ministry of Business, Innovation and Employment

Abstract

Anion exchange membrane water electrolysis
(AEMWE) offers a promising solution for achieving large-scale,
low-cost hydrogen production. Optimizing cathode catalyst-
ionomer-membrane configurations is crucial for improving
AEMWE performance. Herein, cathodes using Pt/C and
Sustainion, PiperION, or Nafion with varying content (5−25 wt
%) and assembly techniques (catalyst-coated substrates, CCSs, and
catalyst-coated membranes, CCMs) are examined to reveal their
impact on AEMWE performance. Scanning electron microscopy
revealed Nafion produced the most homogeneous catalyst layers
and smallest particle sizes. In half-cell testing, 20 wt % Nafion
achieved the lowest overpotential of −15.6 mV at 10 mA cm−2 and
the highest electrochemical surface area of 83.71 cm2 mg−1Pt/C. The
performance trend in CCS was more pronounced than in CCM, as the catalyst layer is deposited layer-by-layer during CCM
fabrication and blocks active sites, obscuring any benefits of optimizing the ionomer loading to achieve minimal agglomeration and
homogeneity. Additionally, CCS outperformed CCM, achieving lower ohmic and charge transfer resistances. The ideal ionomer
content was 15−20 wt % throughout all samples, with 20 wt % Nafion achieving the best performance, owing to the low charge
transfer resistance.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Anion exchange membrane water electrolysis; ionomer; membrane electrode assembly
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverfahrenstechnik > Lehrstuhl Werkstoffverfahrenstechnik - Univ.-Prof. Dr.-Ing. Christina Roth
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 21 Mär 2025 08:45
Letzte Änderung: 21 Mär 2025 08:45
URI: https://eref.uni-bayreuth.de/id/eprint/92922