This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1017/S143192761401349X in citations.
In situ transmission electron microscopy of ionic conductivity and reaction mechanism in ultrathin solid oxide fuel cells
In situ transmission electron microscopy of ionic conductivity and reaction mechanism in ultrathin solid oxide fuel cells
Solid oxide fuel cells (SOFCs) are promising candidates for use in alternative energy technologies. A full understanding of the reaction mechanisms in these dynamic material systems is required to optimize device performance and overcome present limitations. Here, we show that in situ transmission e...
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Personal Name(s): | Tavabi, Amir Hossein (Corresponding Author) |
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Arai, S. / Muto, S. / Tanji, T. / Dunin-Borkowski, Rafal | |
Contributing Institute: |
Mikrostrukturforschung; PGI-5 |
Published in: | Microscopy and microanalysis, 20 (2014) 6, S. 1817 - 1825 |
Imprint: |
New York, NY
Cambridge University Press
2014
|
DOI: |
10.1017/S143192761401349X |
Document Type: |
Journal Article |
Research Program: |
Peter Grünberg-Centre (PG-C) |
Publikationsportal JuSER |
Solid oxide fuel cells (SOFCs) are promising candidates for use in alternative energy technologies. A full understanding of the reaction mechanisms in these dynamic material systems is required to optimize device performance and overcome present limitations. Here, we show that in situ transmission electron microscopy (TEM) can be used to study redox reactions and ionic conductivity in SOFCs in a gas environment at elevated temperature. We examine model ultrathin half and complete cells in two environmental TEMs using off-axis electron holography and electron energy-loss spectroscopy. Our results from the model cells provide insight into the essential phenomena that are important for the operation of commercial devices. Changes in the activities of dopant cations in the solid electrolyte are detected during oxygen anion conduction, demonstrating the key role of dopants in electrolyte architecture in SOFCs. |