| 초록 |
Compared to other energy conversion devices, solid oxide fuel cells (SOFCs) are advantageous energy devices offering notable conversion efficiency, fuel flexibility and long-term stability. To enhance commercial applicability of the SOFC system, symmetrical solid oxide fuel cells (S-SOFCs) have been reported because of the simplified fabrication processing, reduction in cost and minimized thermal stress issues between electrode and electrolyte. However, material selection for S-SOFC electrode is difficult since S-SOFC electrodes need to be stable in both oxidizing and reducing environment. Hereby, we suggest a strontium-doped Pr0.5Ba0.5-xSrxFeO3-d (x=0 ~ 0.4) series. Good redox stability, sufficient electrical conductivity in both environments and high-power density output demonstrates the Pr0.5Ba0.5-xSrxFeO3-d (x=0 ~ 0.4) series as favorable choices for S-SOFC electrodes. |
