Model-supported analysis of degradation phenomena of a PEM water electrolysis cell under dynamic operation

Steffen Henrik Frensch, Anders Christian Olesen, Samuel Simon Araya, Søren Knudsen Kær

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Abstrakt

In this study, a small PEM water electrolysis single cell set up is utilized to extract information about degradation mechanisms. The major parameter of interest is the operational condition, which is changed from constant to cycling current input signal throughout a period of just over 1000h. The cell shows a high reversible share of the voltage increase at constant operation, which builds up slowly and can be recovered through a short interruption of cell operation. Impedance measurements reveal a considerable change in ohmic contributions as well as electrochemical performance over time. The model supported IV curve analysis backs the impedance data and reveals an increase in contact resistances. At the same time, the electrochemical surface area on both electrodes is reduced. The results suggest that dynamic operation may be beneficial for cell performance and therefore operational cost, while a degradation rate of 164.1µV*h−1 was calculated.
OriginalsprogEngelsk
TitelECS Transactions : Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 4
RedaktørerH. Xu, K. E. Ayers, P. J. Kulesza, G. Wu
Antal sider9
Vol/bind85
ForlagElectrochemical Society Inc.
Publikationsdatomaj 2018
Udgave11
Sider37-45
ISBN (Elektronisk)9781607685395
DOI
StatusUdgivet - maj 2018
BegivenhedSymposium on Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 4 - 233rd ECS Meeting - Seattle, USA
Varighed: 13 maj 201817 maj 2018

Konference

KonferenceSymposium on Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 4 - 233rd ECS Meeting
LandUSA
BySeattle
Periode13/05/201817/05/2018
SponsorEnergy Technology, Industrial Electrochemistry and Electrochemical Engineering, Physical and Analytical Electrochemistry
NavnECS Transactions
ISSN1938-6737

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  • Citationsformater

    Frensch, S. H., Olesen, A. C., Araya, S. S., & Kær, S. K. (2018). Model-supported analysis of degradation phenomena of a PEM water electrolysis cell under dynamic operation. I H. Xu, K. E. Ayers, P. J. Kulesza, & G. Wu (red.), ECS Transactions: Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 4 (11 udg., Bind 85, s. 37-45). Electrochemical Society Inc.. ECS Transactions https://doi.org/10.1149/08511.0037ecst