Abstract
Reliability and long life are the keys to the large-scale commercialization of solid oxide fuel cells (SOFCs), so many studies have focused on how to diagnose SOFC degradation mechanisms. Electrochemical tests have been widely used to study SOFC degradation. The SOFC overpotential can be obtained by measuring the current-voltage (I–V) curves, but these measurements do not show the cause of the SOFC performance attenuation. Electrochemical impedance spectroscopy (EIS) measurements can measure various types of SOFC impedances, but this method is difficult to apply to the high-power stack due to the limited output power of the electrochemical workstation. This paper presents a resistance fitting model based on the I-V measurements for large SOFCs that can determine various electrochemical parameters and resistances by fitting the voltages for different regions of the current densities. The model accuracy is verified by EIS measurements at various current densities with the mean absolute percentage error for each type of resistance given by the fitting model being within 10 % of the EIS measurements which shows that the model can accurately identify the SOFC degradation mechanisms.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
