Details
| Original language | English |
|---|---|
| Article number | 014502 |
| Journal | Journal of the Electrochemical Society |
| Volume | 172 |
| Issue number | 1 |
| Publication status | Published - 13 Jan 2025 |
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
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Physics and Astronomy(all)
- Condensed Matter Physics
- Materials Science(all)
- Surfaces, Coatings and Films
- Chemistry(all)
- Electrochemistry
- Materials Science(all)
- Materials Chemistry
Sustainable Development Goals
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In: Journal of the Electrochemical Society, Vol. 172, No. 1, 014502, 13.01.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of Contact Pressure on Hydrogen Crossover and Polarization Behavior in AEM Water Electrolysis
AU - Witte, Jan
AU - Trinke, Patrick
AU - Bensmann, Boris
AU - Becker, Maik
AU - Hanke-Rauschenbach, Richard
AU - Turek, Thomas
N1 - Publisher Copyright: © 2025 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
PY - 2025/1/13
Y1 - 2025/1/13
N2 - 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.
AB - 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.
KW - anion exchange membrane water electrolysis
KW - contact pressure
KW - hydrogen crossover
KW - polarization curve
KW - proton exchange membrane water electrolysis
UR - http://www.scopus.com/inward/record.url?scp=85215205489&partnerID=8YFLogxK
U2 - 10.1149/1945-7111/ad9cce
DO - 10.1149/1945-7111/ad9cce
M3 - Article
AN - SCOPUS:85215205489
VL - 172
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 1
M1 - 014502
ER -