Details
| Original language | English |
|---|---|
| Article number | 233750 |
| Number of pages | 9 |
| Journal | Journal of power sources |
| Volume | 589 |
| Early online date | 24 Oct 2023 |
| Publication status | Published - 1 Jan 2024 |
Abstract
An in-situ reference electrode was used under accelerated stress testing of a proton exchange membrane electrolysis cell. The reference electrode enabled the measurement of anodic and cathodic overpotentials. The accelerated stress test (dynamic load degradation) was conducted for over 1000 h, and it included half-cell measurements of the known anode and cathode potentials, repeated polarization curves, electron impedance spectroscopy and nano-scale imaging. The experiment had an average full-cell degradation rate of 77 μV/h. The anodic overpotential appears to be the main driver of the full-cell efficiency loss. The cathode EIS measurements indicate catalyst layer degradation despite minimal effect on the full-cell performance. The anodic EIS measurements yielded a resistance double that observed at the cathode. By simultaneously analyzing high frequency resistance, corrected half-cell polarization curves and half-cell EIS measurements, half-cell overpotentials can be attributed with greater confidence.
Keywords
- Accelerated stress test, Degradation, Electrolysis, Electron impedance spectroscopy, Half-cell, Proton exchange membrane, Reference electrode
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Energy Engineering and Power Technology
- Chemistry(all)
- Physical and Theoretical Chemistry
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: Journal of power sources, Vol. 589, 233750, 01.01.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Anode and cathode overpotentials under accelerated stress testing of a PEM electrolysis cell
AU - McLeod, Alexander J.
AU - Bühre, Lena V.
AU - Bensmann, Boris
AU - Herrera, Omar E.
AU - Mérida, Walter
N1 - Funding Information: We thank the IfES team at the Leibniz University Hannover, specifically Alexander Rex for thoughtful pre-test discussions. We thank the entire team at MéridaLabs for fruitful group discussions. The UBC affiliated authors gratefully acknowledge financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) and Carbon Engineering Ltd . [grant ALLRP 554473-20 ]. The IfES-EES affiliated authors gratefully acknowledge financial support from the Federal Ministry of Economic Affairs and Climate Action of Germany in the framework of HoKaWe ( 03EI3029B ). This research was partly funded by a doctoral scholarship from the DAAD-Stiftung to the second author (Bühre).
PY - 2024/1/1
Y1 - 2024/1/1
N2 - An in-situ reference electrode was used under accelerated stress testing of a proton exchange membrane electrolysis cell. The reference electrode enabled the measurement of anodic and cathodic overpotentials. The accelerated stress test (dynamic load degradation) was conducted for over 1000 h, and it included half-cell measurements of the known anode and cathode potentials, repeated polarization curves, electron impedance spectroscopy and nano-scale imaging. The experiment had an average full-cell degradation rate of 77 μV/h. The anodic overpotential appears to be the main driver of the full-cell efficiency loss. The cathode EIS measurements indicate catalyst layer degradation despite minimal effect on the full-cell performance. The anodic EIS measurements yielded a resistance double that observed at the cathode. By simultaneously analyzing high frequency resistance, corrected half-cell polarization curves and half-cell EIS measurements, half-cell overpotentials can be attributed with greater confidence.
AB - An in-situ reference electrode was used under accelerated stress testing of a proton exchange membrane electrolysis cell. The reference electrode enabled the measurement of anodic and cathodic overpotentials. The accelerated stress test (dynamic load degradation) was conducted for over 1000 h, and it included half-cell measurements of the known anode and cathode potentials, repeated polarization curves, electron impedance spectroscopy and nano-scale imaging. The experiment had an average full-cell degradation rate of 77 μV/h. The anodic overpotential appears to be the main driver of the full-cell efficiency loss. The cathode EIS measurements indicate catalyst layer degradation despite minimal effect on the full-cell performance. The anodic EIS measurements yielded a resistance double that observed at the cathode. By simultaneously analyzing high frequency resistance, corrected half-cell polarization curves and half-cell EIS measurements, half-cell overpotentials can be attributed with greater confidence.
KW - Accelerated stress test
KW - Degradation
KW - Electrolysis
KW - Electron impedance spectroscopy
KW - Half-cell
KW - Proton exchange membrane
KW - Reference electrode
UR - http://www.scopus.com/inward/record.url?scp=85174572314&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2023.233750
DO - 10.1016/j.jpowsour.2023.233750
M3 - Article
AN - SCOPUS:85174572314
VL - 589
JO - Journal of power sources
JF - Journal of power sources
SN - 0378-7753
M1 - 233750
ER -