Tomography based screening of flow field
Abstract: Current collectors in PEM water electrolysis perform several functions that influence overall performance. These include conducting heat and electrons, as well as transporting water and gas. X-ray tomography, standardized reconstruction, and calculation methods are used to compare the morphological and transport parameters of eight different current collectors functioning as flow fields for PEM water electrolysis. We find simple exponential relations between through-plane thermal conductivity λ and porosity p λ_(20°C) ((p)=1749p^(-1.306)-4.420)), as well as between through-plane electrical conductivity σ and water permeability K (σ(K)=10^(-6)*K^(-0.6376)). In addition, we use both local and global concepts to investigate the pore space of current collectors. We hereby investigate homogeneity and characteristic sizes, like mean pore diameter or mean distance between solid parts at the catalytic interface. Moreover, we find that the local concept of mean chord lengths can be used to explain electrical and thermal conductivity anisotropies. These chords can be used to predict the direction of the largest conductivity for fibrous current collectors
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Anmerkungen
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RSC Advances. 4 (2014), 58888-58894, DOI 10.1039/c4ra12402b, issn: 2046-2069
IN COPYRIGHT http://rightsstatements.org/page/InC/1.0 rs
- Klassifikation
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Biowissenschaften, Biologie
- Schlagwort
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Tomografie
Elektrolyse
- Ereignis
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Veröffentlichung
- (wo)
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Freiburg
- (wer)
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Universität
- (wann)
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2014
- Beteiligte Personen und Organisationen
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Albert-Ludwigs-Universität Freiburg
Technische Fakultät
- DOI
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10.1039/c4ra12402b
- URN
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urn:nbn:de:bsz:25-freidok-122237
- Rechteinformation
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Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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25.03.2025, 13:57 MEZ
Datenpartner
Deutsche Nationalbibliothek. Bei Fragen zum Objekt wenden Sie sich bitte an den Datenpartner.
Beteiligte
- Zielke, Lukas
- Fallisch, Arne Jürgen
- Paust, Nils
- Zengerle, Roland
- Thiele, Simon
- Albert-Ludwigs-Universität Freiburg
- Technische Fakultät
- Universität
Entstanden
- 2014
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