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

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

1 Citation (Scopus)

Abstract

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.
Original languageEnglish
Title of host publicationECS Transactions : Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 4
EditorsH. Xu, K. E. Ayers, P. J. Kulesza, G. Wu
Number of pages9
Volume85
PublisherElectrochemical Society Inc.
Publication dateMay 2018
Edition11
Pages37-45
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - May 2018
EventSymposium on Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 4 - 233rd ECS Meeting - Seattle, United States
Duration: 13 May 201817 May 2018

Conference

ConferenceSymposium on Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 4 - 233rd ECS Meeting
CountryUnited States
CitySeattle
Period13/05/201817/05/2018
SponsorEnergy Technology, Industrial Electrochemistry and Electrochemical Engineering, Physical and Analytical Electrochemistry
SeriesECS Transactions
ISSN1938-6737

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