| 학회 |
한국공업화학회 |
| 학술대회 |
2016년 가을 (10/26 ~ 10/28, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
20권 2호 |
| 발표분야 |
에너지저장변환_포스터 |
| 제목 |
Structural, electrical, and electrochemical properties of YBa0.5Sr0.5Co2-xFexO5+δ (x = 0, 0.25, 0.5, and 0.75) cathodes for intermediate-temperature solid oxide fuel cells |
| 초록 |
Layered perovskite oxides have received extensive attention as promising cathode materials for SOFCs because of their faster diffusion coefficient and transport kinetics of oxygen compared to those of ABO3-type perovskite oxides. In this study, we investigate the effect of Fe doping into YBa0.5Sr0.5Co2O5+δ on the oxygen reduction reaction (ORR) and evaluate the optimal Fe amount through the analysis of the structural characteristics, electrical properties, and electrochemical performance of YBa0.5Sr0.5Co2-xFexO5+δ (x=0, 0.25, 0.5, and 0.75). The optimal amount of Fe substitution is assessed as 12.5% of the B site (YBa0.5Sr0.5Co1.75Fe0.25O5+δ), showing the maximum power density (1.57 W•cm-2) at 600 oC. Moreover, the Fe-doped samples exhibit increased chemical stability under practical operating condition. The results suggest that YBa0.5Sr0.5Co1.75Fe0.25O5+δ is a promising cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs). |
| 저자 |
주상욱1, 권오훈1, 신지영2, 김건태1
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| 소속 |
1UNIST, 2동의대 |
| 키워드 |
Solid oxide fuel cell; SOFC cathode; layered perovskite; Thermal expansion coefficient
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| E-Mail |
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