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Structural and Electrochemical Properties of Dense Yttria-Doped Barium Zirconate Prepared by Solid-State Reactive Sintering

Author

Listed:
  • Dae Sik Yun

    (Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea
    Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea)

  • Jaegyeom Kim

    (Department of Energy Systems Research, Ajou University, Suwon 16499, Korea)

  • Seung-Joo Kim

    (Department of Energy Systems Research, Ajou University, Suwon 16499, Korea)

  • Jong-Heun Lee

    (Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea)

  • Jong-Nam Kim

    (Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea)

  • Hyung Chul Yoon

    (Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea)

  • Ji Haeng Yu

    (Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea)

  • Minseok Kwak

    (Department of Chemistry, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Korea)

  • Hana Yoon

    (Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea)

  • Younghyun Cho

    (Department of Energy Systems, Soonchunhyang University, Asan 31538, Korea)

  • Chung-Yul Yoo

    (Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea)

Abstract

For practical utilization of proton-conducting ceramic fuel cells and electrolyzers, it is essential to lower the sintering temperature and processing time of BaZrO 3 -based proton conductors. We investigated the effect of sintering temperature and time on the structural and electrochemical properties of dense BaZr 0.8 Y 0.2 O 3−δ (BZY) prepared by a solid-state reactive sintering process, using NiO as a sintering aid. The sintered BZY prepared from the micronized precursor powder exhibited a density higher than 93%, and an average grain size in the range of 0.6 to 1.4 μm. The orthorhombic BaY 2 NiO 5 phase was also observed in the sintered BZY from the combined conventional and synchrotron X-ray diffraction measurements. Electrochemical impedance spectroscopy showed that the total proton conductivities of BZY can be modulated by sintering temperature in a wet reducing atmosphere. The maximum total ion transport number achieved was 0.89 at 600 °C, and the maximum power density of the symmetric BZY electrolyte supported cell with Pt electrodes was 5.24 mW·cm −2 at 900 °C.

Suggested Citation

  • Dae Sik Yun & Jaegyeom Kim & Seung-Joo Kim & Jong-Heun Lee & Jong-Nam Kim & Hyung Chul Yoon & Ji Haeng Yu & Minseok Kwak & Hana Yoon & Younghyun Cho & Chung-Yul Yoo, 2018. "Structural and Electrochemical Properties of Dense Yttria-Doped Barium Zirconate Prepared by Solid-State Reactive Sintering," Energies, MDPI, vol. 11(11), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3083-:d:181453
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    Citations

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    Cited by:

    1. Mohsen Fallah Vostakola & Bahman Amini Horri, 2021. "Progress in Material Development for Low-Temperature Solid Oxide Fuel Cells: A Review," Energies, MDPI, vol. 14(5), pages 1-53, February.
    2. Muneeb Irshad & Mehak Khalid & Muhammad Rafique & Asif Nadeem Tabish & Ahmad Shakeel & Khurram Siraj & Abdul Ghaffar & Rizwan Raza & Muhammad Ahsan & Quar tul Ain & Qurat ul Ain, 2021. "Electrochemical Investigations of BaCe 0.7-x Sm x Zr 0.2 Y 0.1 O 3-δ Sintered at a Low Sintering Temperature as a Perovskite Electrolyte for IT-SOFCs," Sustainability, MDPI, vol. 13(22), pages 1-15, November.

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