| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Peer review (Publikation) |
| Titel: | Three-dimensional pore structure and ion conductivity of porous ceramic diaphragms |
| Autor/-in: | Wiedenmann, Daniel Keller, Lukas Holzer, Lorenz Stojadinović, Jelena Münch, Beat Suarez, Laura Fumey, Benjamin Hagendorfer, Harald Brönnimann, Rolf Modregger, Peter Gorbar, Michal Vogt, Ulrich F. Züttel, Andreas La Mantia, Fabio Wepf, Roger Grobéty, Bernard |
| DOI: | 10.1002/aic.14094 |
| Erschienen in: | AIChE Journal |
| Band(Heft): | 59 |
| Heft: | 5 |
| Seite(n): | 1446 |
| Seiten bis: | 1457 |
| Erscheinungsdatum: | 2013 |
| Verlag / Hrsg. Institution: | Wiley |
| ISSN: | 1547-5905 0001-1541 |
| Sprache: | Englisch |
| Schlagwörter: | Map; SOFC |
| Fachgebiet (DDC): | 540: Chemie 620.11: Werkstoffe |
| Zusammenfassung: | The ion conductivity of two series of porous ceramic diaphragms impregnated with caustic potash was investigated by electrochemical impedance spectroscopy. To understand the impact of the pore structure on ion conductivity, the three-dimensional (3-D) pore geometry of the diaphragms was characterized with synchrotron x-ray absorption tomography. Ion migration was calculated based on an extended pore structure model, which includes the electrolyte conductivity and geometric pore parameters, for example, tortuosity (τ) and constriction factor (β), but no fitting parameters. The calculated ion conductivities are in agreement with the data obtained from electrochemical measurements on the diaphragms. The geometric tortuosity was found to be nearly independent of porosity. Pore path constrictions diminish with increasing porosity. The lower constrictivity provides more pore space that can effectively be used for mass transport. Direct measurements from tomographs of tortuosity and constrictivity opens new possibilities to study pore structures and transport properties of porous materials. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/2188 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | School of Engineering |
| Organisationseinheit: | Institute of Computational Physics (ICP) |
| Enthalten in den Sammlungen: | Publikationen School of Engineering |
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Wiedenmann, D., Keller, L., Holzer, L., Stojadinović, J., Münch, B., Suarez, L., Fumey, B., Hagendorfer, H., Brönnimann, R., Modregger, P., Gorbar, M., Vogt, U. F., Züttel, A., La Mantia, F., Wepf, R., & Grobéty, B. (2013). Three-dimensional pore structure and ion conductivity of porous ceramic diaphragms. AIChE Journal, 59(5), 1446–1457. https://doi.org/10.1002/aic.14094
Wiedenmann, D. et al. (2013) ‘Three-dimensional pore structure and ion conductivity of porous ceramic diaphragms’, AIChE Journal, 59(5), pp. 1446–1457. Available at: https://doi.org/10.1002/aic.14094.
D. Wiedenmann et al., “Three-dimensional pore structure and ion conductivity of porous ceramic diaphragms,” AIChE Journal, vol. 59, no. 5, pp. 1446–1457, 2013, doi: 10.1002/aic.14094.
WIEDENMANN, Daniel, Lukas KELLER, Lorenz HOLZER, Jelena STOJADINOVIĆ, Beat MÜNCH, Laura SUAREZ, Benjamin FUMEY, Harald HAGENDORFER, Rolf BRÖNNIMANN, Peter MODREGGER, Michal GORBAR, Ulrich F. VOGT, Andreas ZÜTTEL, Fabio LA MANTIA, Roger WEPF und Bernard GROBÉTY, 2013. Three-dimensional pore structure and ion conductivity of porous ceramic diaphragms. AIChE Journal. 2013. Bd. 59, Nr. 5, S. 1446–1457. DOI 10.1002/aic.14094
Wiedenmann, Daniel, Lukas Keller, Lorenz Holzer, Jelena Stojadinović, Beat Münch, Laura Suarez, Benjamin Fumey, et al. 2013. “Three-Dimensional Pore Structure and Ion Conductivity of Porous Ceramic Diaphragms.” AIChE Journal 59 (5): 1446–57. https://doi.org/10.1002/aic.14094.
Wiedenmann, Daniel, et al. “Three-Dimensional Pore Structure and Ion Conductivity of Porous Ceramic Diaphragms.” AIChE Journal, vol. 59, no. 5, 2013, pp. 1446–57, https://doi.org/10.1002/aic.14094.
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