TY - JOUR
T1 - Towards strategies to mitigate degradation and regenerate performance of a solid oxide electrolyzer during co-electrolysis operation
AU - Königshofer, Benjamin
AU - Höber, Michael
AU - Nusev, Gjorgji
AU - Boškoski, Pavle
AU - Juričić, Đani
AU - Margaritis, Nikolaos
AU - Hochenauer, Christoph
AU - Subotić, Vanja
N1 - Funding Information:
The authors gratefully acknowledge the funding of the project “Degradation monitoring and performance optimization of SOECs” (project number I 3994) by Austrian Science Fund (FWF) and the support of the Slovenian Research Agency through the project J2-9441 and the programme P2-0001.
Publisher Copyright:
© 2022 The Author(s)
PY - 2023/2/1
Y1 - 2023/2/1
N2 - One of the main objectives towards the broad commercialization of solid oxide electrolysis cells (SOEC) is to reduce the effects of degradation and extend the lifetime of the technology. Special industrially relevant operating conditions can, however, amplify and accelerate the degradation of SOECs, thus significantly reducing the lifetime of the technology. Nevertheless, not all degradation processes are completely irreversible, especially if they are detected at an early stage. In order to develop strategies to mitigate degradation and to regenerate performance, several experiments were performed on a five-layer SOEC stack operating in steam and co-electrolysis mode. The experiments were performed at different industrially relevant gas mixtures, reactant conversion rates and operating temperatures. The experimental results revealed different types and degrees of effects of the degradation, mitigation and regeneration strategies on the performance of the stack, which were analyzed in detail and linked to the underlying mechanisms and processes. As a result, promising strategies for mitigating degradation and regenerating the performance of SOECs could be derived and optimized. In addition, this study provides a set of recommendations for safe and stable operation of SOECs under various operating conditions.
AB - One of the main objectives towards the broad commercialization of solid oxide electrolysis cells (SOEC) is to reduce the effects of degradation and extend the lifetime of the technology. Special industrially relevant operating conditions can, however, amplify and accelerate the degradation of SOECs, thus significantly reducing the lifetime of the technology. Nevertheless, not all degradation processes are completely irreversible, especially if they are detected at an early stage. In order to develop strategies to mitigate degradation and to regenerate performance, several experiments were performed on a five-layer SOEC stack operating in steam and co-electrolysis mode. The experiments were performed at different industrially relevant gas mixtures, reactant conversion rates and operating temperatures. The experimental results revealed different types and degrees of effects of the degradation, mitigation and regeneration strategies on the performance of the stack, which were analyzed in detail and linked to the underlying mechanisms and processes. As a result, promising strategies for mitigating degradation and regenerating the performance of SOECs could be derived and optimized. In addition, this study provides a set of recommendations for safe and stable operation of SOECs under various operating conditions.
KW - Degradation
KW - Distribution of relaxation times (DRT)
KW - Electrochemical analysis
KW - Mitigation
KW - Regeneration
KW - Solid oxide electrolysis cell (SOEC)
UR - http://www.scopus.com/inward/record.url?scp=85143711704&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2022.232404
DO - 10.1016/j.jpowsour.2022.232404
M3 - Article
AN - SCOPUS:85143711704
SN - 0378-7753
VL - 556
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 232404
ER -