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dc.contributor.author
Garbe, Steffen
dc.contributor.author
Futter, Jonas
dc.contributor.author
Schmidt, Thomas J.
dc.contributor.author
Gubler, Lorenz
dc.date.accessioned
2021-03-23T10:15:45Z
dc.date.available
2021-03-23T03:59:53Z
dc.date.available
2021-03-23T10:15:45Z
dc.date.issued
2021-05
dc.identifier.issn
0013-4686
dc.identifier.issn
1873-3859
dc.identifier.issn
000031983
dc.identifier.other
10.1016/j.electacta.2021.138046
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/475848
dc.identifier.doi
10.3929/ethz-b-000475848
dc.description.abstract
We present a study of a liquid water fed polymer electrolyte water electrolyzer (PEWE) at cell temperatures of up to 120 °C using thin membranes of 50 µm thickness. Further, we show that under these conditions conversion efficiency increases by up to 14% at 3 A cm−2 in comparison to today's state of the art (60 °C, 180 μm membrane). Alternatively, an increase of the current density by a factor of 3 at an efficiency of 75% is possible. A detailed voltage loss analysis is provided that helps to understand to which extent the overpotential contributions are reduced. From hydrogen permeation measurements, we determine faradic efficiency and the safety limits of cell operation revealing that operating temperatures higher than 100 °C with thin membranes are not possible at current densities lower than 0.8 A cm−2 due to the safety limit of 2% hydrogen in oxygen in the anode compartment. The decrease in overpotential allows to significantly reduce the energy requirement or to increase the production rate of hydrogen. The results can help to benchmark future efficiency targets and points towards next generation PEWE materials and components to further reduce loss contributions.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
Proton exchange membrane (PEM) water electrolysis
en_US
dc.subject
Water splitting
en_US
dc.subject
Polymer electrolyte water electrolysis
en_US
dc.subject
Elevated temperature
en_US
dc.subject
Overpotential analysis
en_US
dc.subject
High efficiency
en_US
dc.subject
Thin membrane
en_US
dc.title
Insight into elevated temperature and thin membrane application for high efficiency in polymer electrolyte water electrolysis
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2021-03-03
ethz.journal.title
Electrochimica Acta
ethz.journal.volume
377
en_US
ethz.journal.abbreviated
Electrochim. acta
ethz.pages.start
138046
en_US
ethz.size
12 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2021-03-23T03:59:58Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-03-23T10:15:56Z
ethz.rosetta.lastUpdated
2021-03-23T10:15:56Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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