A three dimensional multiphysics model of a solid oxide electrochemical cell : A tool for understanding degradation
(2018) In International Journal of Hydrogen Energy 43(27). p.11913-11931- Abstract
Mitigating degradation is essential for extending the lifetime of solid oxide electrochemical cells (SOCs). The conditions leading to degradation, e.g. overpotentials, gas partial pressures, thermal gradients are hard, if not impossible, to retrieve experimentally. Thus, to deconvolute the response from cell testing, modeling can be applied to understand the degradation phenomena in greater detail. Modeling of SOCs is well developed. For computational efficiency, the electrodes are often represented with a mathematical abstraction of zero thickness layer. In this work, further attention is given to the local conditions in the through-thickness of the electrodes, by rigidly integrating classical electrochemistry into a three dimensional... (More)
Mitigating degradation is essential for extending the lifetime of solid oxide electrochemical cells (SOCs). The conditions leading to degradation, e.g. overpotentials, gas partial pressures, thermal gradients are hard, if not impossible, to retrieve experimentally. Thus, to deconvolute the response from cell testing, modeling can be applied to understand the degradation phenomena in greater detail. Modeling of SOCs is well developed. For computational efficiency, the electrodes are often represented with a mathematical abstraction of zero thickness layer. In this work, further attention is given to the local conditions in the through-thickness of the electrodes, by rigidly integrating classical electrochemistry into a three dimensional multiphysics model of an SOC. Hereby, local conditions (e.g. overpotential) vary through the electrode, and with the coupling to the different transport phenomena occurring (mass, current, momentum and species), this becomes available in three dimensions, throughout a cell. To investigate the validity of the model, a high number of experiments are conducted at different operating conditions, i.e. in both fuel cell and electrolysis mode of operation with H2/H2O as feedstock varying parameters such as temperature, gas flows and gas compositions.
(Less)
- author
- Navasa, Maria LU ; Graves, Christopher ; Chatzichristodoulou, Christodoulos ; Løye Skafte, Theis ; Sundén, Bengt LU and Lund Frandsen, Henrik
- organization
- publishing date
- 2018-07
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Degradation, Modeling, Potential profiles, Solid oxide electrochemical cells, Transport phenomena
- in
- International Journal of Hydrogen Energy
- volume
- 43
- issue
- 27
- pages
- 11913 - 11931
- publisher
- Elsevier
- external identifiers
-
- scopus:85047218151
- ISSN
- 0360-3199
- DOI
- 10.1016/j.ijhydene.2018.04.164
- language
- English
- LU publication?
- yes
- id
- abf2559c-9c61-4bbe-a490-025ee6af9cf2
- date added to LUP
- 2018-06-04 09:26:59
- date last changed
- 2025-04-04 14:41:59
@article{abf2559c-9c61-4bbe-a490-025ee6af9cf2,
abstract = {{<p>Mitigating degradation is essential for extending the lifetime of solid oxide electrochemical cells (SOCs). The conditions leading to degradation, e.g. overpotentials, gas partial pressures, thermal gradients are hard, if not impossible, to retrieve experimentally. Thus, to deconvolute the response from cell testing, modeling can be applied to understand the degradation phenomena in greater detail. Modeling of SOCs is well developed. For computational efficiency, the electrodes are often represented with a mathematical abstraction of zero thickness layer. In this work, further attention is given to the local conditions in the through-thickness of the electrodes, by rigidly integrating classical electrochemistry into a three dimensional multiphysics model of an SOC. Hereby, local conditions (e.g. overpotential) vary through the electrode, and with the coupling to the different transport phenomena occurring (mass, current, momentum and species), this becomes available in three dimensions, throughout a cell. To investigate the validity of the model, a high number of experiments are conducted at different operating conditions, i.e. in both fuel cell and electrolysis mode of operation with H<sub>2</sub>/H<sub>2</sub>O as feedstock varying parameters such as temperature, gas flows and gas compositions.</p>}},
author = {{Navasa, Maria and Graves, Christopher and Chatzichristodoulou, Christodoulos and Løye Skafte, Theis and Sundén, Bengt and Lund Frandsen, Henrik}},
issn = {{0360-3199}},
keywords = {{Degradation; Modeling; Potential profiles; Solid oxide electrochemical cells; Transport phenomena}},
language = {{eng}},
number = {{27}},
pages = {{11913--11931}},
publisher = {{Elsevier}},
series = {{International Journal of Hydrogen Energy}},
title = {{A three dimensional multiphysics model of a solid oxide electrochemical cell : A tool for understanding degradation}},
url = {{http://dx.doi.org/10.1016/j.ijhydene.2018.04.164}},
doi = {{10.1016/j.ijhydene.2018.04.164}},
volume = {{43}},
year = {{2018}},
}