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The commercial breakthrough of solid oxide fuel cells (SOFCs) is still hampered by degradation related issues. Most SOFCs that perform well do not possess good stability. To achieve a targeted degradation rate of 0.2%/1000 h important to a durable SOFC device, it is vital to identify the sources of degradation. So far, the longest stable performance was given by F1002-97, a short stack from Forschungszentrum Jülich GmbH, which reached 93,000 h of operation at 700 °C under 0.5 A cm−2 constant current density with a degradation rate of 0.5%/1000 h. In this review, we discuss the most detrimental degradation mechanisms for the core components of the SOFC, mainly poisoning, microstructural deformations, and strains. Electrochemical, chemical, and structural characterization tools for quantifying degradation mechanisms are also presented. The following section addresses the most recent progress in SOFC durability and the associated methods for analyzing degradation. These techniques include different doping techniques (including Mo, Nb, Co, Ce, Ta, Sn, etc.), surface modifications (e.g.infiltration, exsolution techniques, protective coatings), and interface engineering. Finally, the factors that inhibit the enhancement of SOFC durability are briefly discussed, such as inadequate knowledge of the degradation process and limitations in the material choices.
|Number of pages||34|
|Journal||Renewable and Sustainable Energy Reviews|
|Publication status||Published - Jun 2022|
|MoE publication type||A2 Review article in a scientific journal|
- Characterization techniques
- Degradation mechanisms
- Interface engineering
- Solid oxide fuel cell (SOFC)
- Surface modification
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- 1 Finished
Leading-edge next generation fuel cell devices
Asghar, I., Bilbey, B., Jouttijärvi, S., Zarabi Golkhatmi, S. & Savikko, A.
01/09/2019 → 31/08/2022
Project: Academy of Finland: Other research funding