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Analysis of Electrochemical Properties of LT-SOFCs According to Thickness of PrO x Cathode Interlayer

Author

Listed:
  • Ji-Woong Jeon

    (Department of Mechanical Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si 16890, Republic of Korea)

  • Jun-Geon Park

    (Department of Mechanical Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si 16890, Republic of Korea)

  • Geon-Hyeop Kim

    (Department of Mechanical Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si 16890, Republic of Korea)

  • Seung-Heon Lee

    (Department of Mechanical Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si 16890, Republic of Korea)

  • Jeong-Woo Shin

    (School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore)

  • Gu-Young Cho

    (Department of Mechanical Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si 16890, Republic of Korea)

Abstract

Solid oxide fuel cells (SOFCs) are attracting attention as an eco-friendly power source because they show high power density. However, SOFC requires a high-temperature environment of 800 °C or higher, and accordingly, the problem of thermal stability of the material constituting SOFC has been raised. On the other hand, low-temperature solid oxide fuel cells (LT-SOFCs) research is steadily progressing to improve the electrochemical performance at low temperatures by improving the oxygen reduction reaction of the cathode by applying a cathode interlayer of various materials. In this study, LT-SOFCs were manufactured and electrochemically evaluated using praseodymium oxide (PrO x ) as a cathode interlayer. Scandium Stabilized Zirconia (ScSZ) pellets were used as electrolyte support for LT-SOFC, and PrO x was deposited by various thicknesses as a cathode interlayer on ScSZ pellets by a sputtering process. Pt and Ni were deposited under the same process conditions for the cathode and anode, respectively. To analyze the thin-film characteristics of the PrO x cathode interlayer, SEM (Scanning Electron Microscopy), X-ray Diffraction (XRD), and XPS (X-ray Photoelectron Spectroscopy) were analyzed. The electrochemical characteristics of LT-SOFCs were evaluated by electrochemical impedance spectroscopy (EIS). Hydrogen was supplied to the anode at the flow rate of 50 sccm, and the performance of LT-SOFC was evaluated at 500 °C by exposing the cathode to the atmosphere.

Suggested Citation

  • Ji-Woong Jeon & Jun-Geon Park & Geon-Hyeop Kim & Seung-Heon Lee & Jeong-Woo Shin & Gu-Young Cho, 2025. "Analysis of Electrochemical Properties of LT-SOFCs According to Thickness of PrO x Cathode Interlayer," Sustainability, MDPI, vol. 17(4), pages 1-17, February.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:4:p:1403-:d:1586853
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    References listed on IDEAS

    as
    1. Guo, Xinru & Guo, Yumin & Wang, Jiangfeng & Meng, Xin & Deng, Bohao & Wu, Weifeng & Zhao, Pan, 2023. "Thermodynamic analysis of a novel combined heating and power system based on low temperature solid oxide fuel cell (LT-SOFC) and high temperature proton exchange membrane fuel cell (HT-PEMFC)," Energy, Elsevier, vol. 284(C).
    2. Cho, Gu Young & Lee, Yoon Ho & Cha, Suk Won, 2014. "Multi-component nano-composite electrode for SOFCS via thin film technique," Renewable Energy, Elsevier, vol. 65(C), pages 130-136.
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