Volume 44, Issue 13 pp. 9995-10007
RESEARCH ARTICLE

Improved electrochemical performance and durability of butane-operating low-temperature solid oxide fuel cell through palladium infiltration

Cam-Anh Thieu

Cam-Anh Thieu

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

Division of Nano & Information Technology, KIST School, Korea University of Science and Technology (UST), Seoul, Republic of Korea

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Sangbaek Park

Sangbaek Park

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

Division of Nano & Information Technology, KIST School, Korea University of Science and Technology (UST), Seoul, Republic of Korea

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Hyoungchul Kim

Hyoungchul Kim

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

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Ho-Il Ji

Ho-Il Ji

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

Division of Nano & Information Technology, KIST School, Korea University of Science and Technology (UST), Seoul, Republic of Korea

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Jong-Ho Lee

Jong-Ho Lee

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

Division of Nano & Information Technology, KIST School, Korea University of Science and Technology (UST), Seoul, Republic of Korea

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Kyung Joong Yoon

Kyung Joong Yoon

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

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Sungeun Yang

Sungeun Yang

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

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Ji-Won Son

Corresponding Author

Ji-Won Son

Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea

Division of Nano & Information Technology, KIST School, Korea University of Science and Technology (UST), Seoul, Republic of Korea

Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL), Korea University, Seoul, Republic of Korea

Correspondence

Ji-Won Son, Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), 14-5 Hwarang-ro, Seongbuk-gu, Seoul 02792, Republic of Korea.

Email: [email protected]

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First published: 07 July 2020
Citations: 19

Funding information: Korea Institute of Science and Technology (KIST), Grant/Award Number: 2E30220; Ministry of Science and ICT (MSIT), Grant/Award Number: NRF-2015M3A6A7065442; National Research Foundation of Korea (NRF), Grant/Award Number: NRF-2017M1A2A2044982

Summary

Low-operating-temperature solid oxide fuel cells (LT-SOFCs) with various kinds of fuel, such as hydrocarbons, biogas, natural gas, and oxygenated fuel has been an active SOFC research topic. However, conventional SOFC anodes comprised of nickel metal and yttria-stabilized zirconia composite (Ni-YSZ) experience rapid degradation when operated for the butane direct internal steam reforming (B-DISR), especially at a low temperature (LT) range. This study reveals that the impregnated Pd into the Ni-YSZ anode support of thin-film SOFCs (TF-SOFCs) is effective for achieving better performance and stability regarding the TF-SOFC in B-DISR at 600°C. Adding Pd as a dopant into Ni-YSZ significantly promotes the catalytic activity due to the Pd-Ni alloy formation, both on the YSZ grain and the Ni grain surface. The electrochemical performance of cells without Pd (Ni-YSZ cell) and a Pd-infiltrated Ni-YSZ anode (Pd-Ni-YSZ cell) are compared at 600°C for the B-DISR mode at a ratio of steam-to-carbon of 3. Finally, long-term durability tests were performed at 600°C and under 0.15 A cm−2. The Pd infiltration decreases the deterioration rate to 0.63 mV h−1 after the first 80 hours of operation for the Pd-Ni-YSZ cell, which was a significant improvement from that of the Ni-YSZ cell, 3.75 mV h−1 after 40 hours of operation.

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