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dc.contributor.author
Biesdorf, Johannes
dc.contributor.author
Stahl, Peter
dc.contributor.author
Siegwart, Muriel
dc.contributor.author
Schmidt, Thomas
dc.contributor.author
Boillat, Pierre
dc.date.accessioned
2022-09-08T07:57:25Z
dc.date.available
2017-06-11T19:45:24Z
dc.date.available
2022-09-08T07:57:25Z
dc.date.issued
2015-01
dc.identifier.issn
0013-4651
dc.identifier.issn
1945-7111
dc.identifier.other
10.1149/2.0871510jes
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/105023
dc.identifier.doi
10.3929/ethz-b-000105023
dc.description.abstract
Understanding the freezing mechanism of liquid water within polymer electrolyte fuel cells (PEFC) is crucial for its commercialization for mass market. Although various publications investigated the cold start capability of PEFCs, contradictory behaviors during cold starts at freezing temperatures have been published in literature. Interestingly, differences can be mainly identified between large and small size fuel cells: the latter have a significantly higher cold start capability than large size fuel cells. In order to understand the influence of different active areas, we present measurements of cold starts performed with cells sizes of 1 and 50 cm2 using the same materials, including a large count of experiments (>200) on the 1 cm2 cells to perform statistical analysis. The cold start capability is strongly reduced with an increasing size of the active area, and the operating times changes from stochastic values for small cells to reproducible values for large cells. Both effects can be explained by the higher probability of the aggregate state transition from super-cooled water to ice in large cells. Consequently this paper highlights the implications of downscaling PEFCs to draw conclusions for technical relevant cold-starts.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
The Electrochemical Society
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Active Area
en_US
dc.subject
Cold Start
en_US
dc.subject
Monte-Carlo Simulation
en_US
dc.subject
PEFC
en_US
dc.title
When Size Matters: Active Area Dependence of PEFC Cold Start Capability
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2015-08-10
ethz.journal.title
Journal of the Electrochemical Society
ethz.journal.volume
162
en_US
ethz.journal.issue
10
en_US
ethz.journal.abbreviated
J. Electrochem. Soc.
ethz.pages.start
F1231
en_US
ethz.pages.end
F1235
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
000003967
ethz.publication.place
Pennington, NJ
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02543 - Inst. f. Molekulare Physikalische Wiss. / Institute of Molecular Physical Science::03910 - Schmidt, Thomas J. / Schmidt, Thomas J.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02543 - Inst. f. Molekulare Physikalische Wiss. / Institute of Molecular Physical Science::03910 - Schmidt, Thomas J. / Schmidt, Thomas J.
ethz.date.deposited
2017-06-11T19:45:44Z
ethz.source
ECIT
ethz.identifier.importid
imp59365389dbb6873158
ethz.ecitpid
pub:164460
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-14T15:20:50Z
ethz.rosetta.lastUpdated
2024-02-02T18:04:35Z
ethz.rosetta.versionExported
true
ethz.COinS
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