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Layering Optimization of the $SrFe_{0.9}Ti_{0.1}O_{3−δ}–Ce_{0.8}Sm_{0.2}O_{1.9}$ Composite Cathode
| Content Provider | MDPI |
|---|---|
| Author | Aziz, Azreen Junaida Abd Baharuddin, Nurul Akidah Somalu, Mahendra Rao Muchtar, Andanastuti |
| Copyright Year | 2022 |
| Description | Cathode thickness plays a major role in establishing an active area for an oxygen reduction reaction in energy converter devices, such as solid oxide fuel cells. In this work, we prepared $SrFe_{0.9}Ti_{0.1}O_{3−δ}–Ce_{0.8}Sm_{0.2}O_{1.9}$ composite cathodes with different layers (1×, 3×, 5×, 7×, and 9× layer). The microstructural and electrochemical performance of each cell was then explored through scanning electron microscopy and electrochemical impedance spectroscopy (EIS). EIS analysis showed that the area-specific resistance (ASR) decreased from 0.65 $Ωcm^{2}$ to 0.12 $Ωcm^{2}$ with the increase in the number of layers from a 1× to a 7×. However, the ASR started to slightly increase at the 9× layer to 2.95 $Ωcm^{2}$ due to a higher loss of electrode polarization resulting from insufficient gas diffusion and transport. Therefore, increasing the number of cathode layers could increase the performance of the cathode by enlarging the active area for the reaction up to the threshold point. |
| Starting Page | 2549 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules27082549 |
| Journal | Molecules |
| Issue Number | 8 |
| Volume Number | 27 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-14 |
| Access Restriction | Open |
| Subject Keyword | Molecules Energy and Fuel Technology Area-specific Resistance Electrochemical Impedance Layered Structures Microstructures Solid Oxide Fuel Cell |
| Content Type | Text |
| Resource Type | Article |
