Tjaden, B;
Lane, J;
Brett, DJL;
Shearing, PR;
(2017)
Understanding transport phenomena in electrochemical energy devices via X-ray nano CT.
Journal of Physics: Conference Series
, 849
(1)
, Article 012018. 10.1088/1742-6596/849/1/012018.
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Abstract
Porous support layers in electrochemical devices ensure mechanical stability of membrane assemblies such as solid oxide fuel cells and oxygen transport membranes (OTMs). At the same time, porous layers affect diffusive mass transport of gaseous reactants and contribute to performance losses at high fuel utilisation and conversion ratios. Microstructural characteristics are vital to calculate mass transport phenomena, where tortuosity remains notoriously difficult to determine. Here, the tortuosity of tubular porous support layers of OTMs is evaluated via high resolution X-ray nano computed tomography. The high resolution reveals the complex microstructure of the samples to then execute a selection of image-based tortuosity calculation algorithms. Visible differences between geometric and flux-based algorithms are observed and have thus to be applied with caution.
| Type: | Article |
|---|---|
| Title: | Understanding transport phenomena in electrochemical energy devices via X-ray nano CT |
| Event: | X-Ray Microscopy Conference 2016 (XRM 2016) |
| Location: | Oxford University, United Kingdom |
| Dates: | 15 August 2016 - 19 August 2016 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1742-6596/849/1/012018 |
| Publisher version: | http://doi.org/10.1088/1742-6596/849/1/012018 |
| Language: | English |
| Additional information: | Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1568394 |
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