| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Enhancing the oxygen reduction reaction kinetics of LSCF cathodes via ultrasonic spray infiltration of Sm and Nd co-doped ceria nanoparticles |
| 초록 |
The fabrication of stable cathodes with fast oxygen reduction (ORR) kinetics is a great challenge for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Surface modification of the state-of-art SOFC cathode materials through solution-based infiltration is a facile method to enhance the kinetics of ORR on SOFC cathodes. In this study, the surface of commercial La0.6Sr0.4Co0.2Fe0.8O3-x (LSCF) cathode is nano-tailored via ultrasonic spray infiltration of Sm and Nd co-doped ceria (SNDC) ionically conductive nanoparticles. At the optimal loading amount, the SNDC forms nanoparticles on the LSCF surface and shows an ~70% reduction in polarization resistance over the pristine LSCF at 700 °C. Beyond the optimal loading, the SNDC nanolayer blocks the reaction sites on LSCF and the polarization resistance is started to increase again. The microstructural analysis revealed that the improved electrochemical performance at optimal SNDC loading was attributed to the extension of cathode reactive sites that enhance the oxygen surface exchange kinetics of LSCF cathodes. Moreover, the anode-supported cell with SNDC infiltrated LSCF cathode exhibits an ~52% reduction in polarization resistance value and an ~47% increase in maximum power density compared to the bare LSCF cathode at 700 °C. The highly ionic conductive nanoparticles of SNDC on the surface of the LSCF cathode tailored by the infiltration method dramatically enhance the electrode performance of SOFC. |
| 저자 |
Hafiz Ahmad Ishfaq1, Rak-Hyun Song2, Jong-Eun Hong1, Seung-Bok Lee2, Tak-Hyoung Lim1, Zubair Masaud1, Dong-woo Joh2
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| 소속 |
1Korea Institute of Energy Research, 2Univ. of Science and Technology (UST) |
| 키워드 |
Solid oxide fuel cell; Ultrasonic infiltration; Nano tailoring; Oxygen reduction reaction
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| E-Mail |
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