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Pr- and Sm-Substituted Layered Perovskite Oxide Systems for IT-SOFC Cathodes

Author

Listed:
  • Sung Hun Woo

    (Department of Advanced Materials Science and Engineering, Hanbat National University, 125, Dongseodae-ro, Yuseong-gu, Daejeon 34158, Korea)

  • Kyeong Eun Song

    (Department of Advanced Materials Science and Engineering, Hanbat National University, 125, Dongseodae-ro, Yuseong-gu, Daejeon 34158, Korea)

  • Seung-Wook Baek

    (Interdisciplinary Materials Measurement Institute, Korea Research Institute of Standards and Science (KRISS), 267, Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea)

  • Hyunil Kang

    (Department of Electrical Engineering, Hanbat National University, 125, Dongseo-Daero, Yuseong-gu, Daejeon 34158, Korea)

  • Wonseok Choi

    (Department of Electrical Engineering, Hanbat National University, 125, Dongseo-Daero, Yuseong-gu, Daejeon 34158, Korea)

  • Tae Ho Shin

    (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology (KICET), 101, Soho-ro, Jinju-si 52851, Korea)

  • Jun-Young Park

    (HMC, Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 143-747, Korea)

  • Jung Hyun Kim

    (Department of Advanced Materials Science and Engineering, Hanbat National University, 125, Dongseodae-ro, Yuseong-gu, Daejeon 34158, Korea)

Abstract

In this study, the phase synthesis and electrochemical properties of A / A // A /// B 2 O 5+d (A / : Lanthanide, A // : Ba, and A // : Sr) layered perovskites in which Pr and Sm were substituted at the A/-site were investigated for cathode materials of Intermediate Temperature-Operating Solid Oxide Fuel cells (IT-SOFC). In the Pr x Sm 1−x Ba 0.5 Sr 0.5 Co 2 O 5+d (x = 0.1–0.9) systems, tetragonal (x < 0.4) and orthorhombic (x ≥ 0.5) crystalline structures were confirmed according to the substitution amount of Pr, which has a relatively large ionic radius, and Sm, which has a small ionic radius. All of the layered perovskite oxide systems utilized in this study presented typical metallic conductivity behavior, with decreasing electrical conductivity as temperature increased. In addition, Pr 0.5 Sm 0.5 Ba 0.5 Sr 0.5 Co 2 O 5+d (PSBSCO55), showing a tetragonal crystalline structure, had the lowest conductivity values. However, the Area-Specific Resistance (ASR) of PSBSCO55 was found to be 0.10 Ω cm 2 at 700 °C, which is lower than those of the other compositions.

Suggested Citation

  • Sung Hun Woo & Kyeong Eun Song & Seung-Wook Baek & Hyunil Kang & Wonseok Choi & Tae Ho Shin & Jun-Young Park & Jung Hyun Kim, 2021. "Pr- and Sm-Substituted Layered Perovskite Oxide Systems for IT-SOFC Cathodes," Energies, MDPI, vol. 14(20), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6739-:d:657863
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    Cited by:

    1. Bahman Amini Horri, 2022. "Special Issue “Emerging Materials and Fabrication Methods for Solid Oxide Fuel Cells (SOFCs)”," Energies, MDPI, vol. 15(9), pages 1-6, April.

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