Analysis of temporal changes in hydrogen permeation during run-in phase of PEM water electrolysis lab short-stacks considering electro-osmotic drag
Abstract
This work presents experimentally determined H2 in O2 concentrations from the first approximately 1000 h of atmospheric operation of proton exchange membrane water electrolysis lab short-stacks. These exhibit a run-in effect in the form of increasing H2 gas permeation over the first few hundred hours, followed by stabilization. A model-based interpretation of the H2 in O2 data indicates an approximate doubling of both mass transfer coefficients, for the membrane and the cathode catalyst layer. Using two different membrane types with remarkably different electro-osmotic drag coefficients demonstrates that the consideration of convection in the model significantly influences the determined cathode mass transfer coefficient. However, the relative increase over time remains unchanged.
Details
- Organisation(s)
-
Institute of Electric Power Systems
- External Organisation(s)
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Siemens AG - Siemens in Erlangen
- Type
- Article
- Journal
- International Journal of Hydrogen Energy
- Volume
- 203
- ISSN
- 0360-3199
- Publication date
- 23.01.2026
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment, Fuel Technology, Condensed Matter Physics, Energy Engineering and Power Technology
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Electronic version(s)
-
https://doi.org/10.1016/j.ijhydene.2025.153179 (Access:
Open
)
