EconPapers    
Economics at your fingertips  
 

Opportunities of in situ diagnostics and current distribution in proton exchange membrane water Electrolyzers with segmented bipolar plates

Benjamin Kimmel, D. Garcia-Sanchez, T. Morawietz, M. Schulze, I. Biswas, A.S. Gago and K.A. Friedrich

Applied Energy, 2025, vol. 380, issue C, No S0306261924024905

Abstract: The widespread implementation of renewable energy for the decarbonization of our society is a pressing challenge that requires the use of large-scale electrolyzers to produce green hydrogen. Proton exchange membrane water electrolysis (PEMWE) is ideal for this purpose given its small footprint and flexibility to operate dynamically. However, little is known about the degradation of PEMWEs, and advanced techniques are required for monitoring the health states of stacks. Here, we have successfully integrated a powerful tool for in situ diagnostics in a 25 cm2 active area PEMWE. A segmented bipolar plate (SBPP) allows local measurements of current and temperature. A series of experiments showing the benefits of the SBPP are described in this work. First, clamping pressure due to uneven torque forces can be determined with the SBPP during cell assembly. When varying the temperature to 80 °C, the current distribution in the cell area is homogeneous over the cell area. Conversely, the tool reveals local current differences reaching 80 % when limiting the water flow in the catalyst-coated membrane (CCM). Furthermore, mass transport phenomena due to flow field design are nonuniform over the cell area and can be monitored at current densities approaching 5.5 A cm−2. Finally, SBPP is used to investigate local degradation due to contaminants, showing different deactivation zones of the electrode due to poisoning, which is confirmed by energy dispersive X-ray spectroscopy (EDS). The SBPP is versatile and robust, and it opens the possibility for studying in situ a wide range of cell phenomena from mass transport to degradation, thus demonstrating its superior value for diagnostics in PEMWE systems in many different research fields.

Keywords: PEM electrolysis; Segmented cell; Degradation; Current density distribution; In situ analysis (search for similar items in EconPapers)
Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261924024905
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:380:y:2025:i:c:s0306261924024905

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2024.125106

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().

 
Page updated 2025-05-25
Handle: RePEc:eee:appene:v:380:y:2025:i:c:s0306261924024905