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Highly Conductive Cerium- and Neodymium-Doped Barium Zirconate Perovskites for Protonic Ceramic Fuel Cells

Author

Listed:
  • Serdar Yilmaz

    (Department of Physics, Mersin University, Mersin 33343, Turkey
    School of Chemistry and Chemical Engineering, University of Surrey, Guildford GU2 7XH, UK)

  • Bekir Kavici

    (Department of Nanotechnology and Advanced Materials, Mersin University, Mersin 33343, Turkey)

  • Prakash Ramakrishnan

    (School of Chemistry and Chemical Engineering, University of Surrey, Guildford GU2 7XH, UK)

  • Cigdem Celen

    (Department of Nanotechnology and Advanced Materials, Mersin University, Mersin 33343, Turkey)

  • Bahman Amini Horri

    (School of Chemistry and Chemical Engineering, University of Surrey, Guildford GU2 7XH, UK)

Abstract

The rare-earth-doped zirconia-based solid electrolytes have gained significant interest in protonic ceramic fuel cell (PCFC) applications due to their high ionic conductivity. However, these solid electrolytes are susceptible to low conductivity and chemical stability at low operating temperatures, which are of interest in commercializing ceramic fuel cells. Thus, tailoring the structural properties of these electrolytes towards gaining high ionic conductivity at low/intermediate temperatures is crucial. In this study, Ce (cerium) and Nd (neodymium) co-doped barium zirconate perovskites, BaZr (0.80- x-y ) Ce x Nd y Y 0.10 Yb 0.10 O 3- δ (BZCNYYO) of various doping fractions ( x , y : 0, 0.5, 0.10, 0.15), were synthesized (by the Pechini method) to systematically analyze their structural and conductivity properties. The X-ray diffraction patterns showed a significant lattice strain, and the stress inferences for each co-doped BZCNYYO sample were compared with Nd-cation-free reference samples, BaZrO 3 and BaZr (0.80- x-y-z ) Ce x Y y Yb z O 3- δ ( x : 0, 0.70; y : 0.20, 0.10; z : 0, 0.10). The comparative impedance investigation at low-to-intermediate temperatures (300–700 °C) showed that BaZr 0.50 Ce 0.15 Nd 0.15 Y 0.10 Yb 0.10 O 3- δ offers the highest lattice strain and stress characteristics with an ionic conductivity ( σ ) of 0.381 mScm −1 at 500 °C and activation energy ( E a ) of 0.47 eV. In addition, this σ value was comparable to the best reference sample BaZr 0.10 Ce 0.70 Y 0.10 Yb 0.10 O 3- δ (0.404 mScm −1 ) at 500 °C, and it outperformed all the reference samples when the set temperature condition was ≥600 °C. The result of this study suggests that Ce- and Nd-doped BZCNYYO solid electrolytes will be a specific choice of interest for developing intermediate-temperature PCFC applications with high ionic conductivity.

Suggested Citation

  • Serdar Yilmaz & Bekir Kavici & Prakash Ramakrishnan & Cigdem Celen & Bahman Amini Horri, 2023. "Highly Conductive Cerium- and Neodymium-Doped Barium Zirconate Perovskites for Protonic Ceramic Fuel Cells," Energies, MDPI, vol. 16(11), pages 1-14, May.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:11:p:4318-:d:1155350
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    References listed on IDEAS

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    1. Sihyuk Choi & Chris J. Kucharczyk & Yangang Liang & Xiaohang Zhang & Ichiro Takeuchi & Ho-Il Ji & Sossina M. Haile, 2018. "Exceptional power density and stability at intermediate temperatures in protonic ceramic fuel cells," Nature Energy, Nature, vol. 3(3), pages 202-210, March.
    2. Chuancheng Duan & Robert Kee & Huayang Zhu & Neal Sullivan & Liangzhu Zhu & Liuzhen Bian & Dylan Jennings & Ryan O’Hayre, 2019. "Highly efficient reversible protonic ceramic electrochemical cells for power generation and fuel production," Nature Energy, Nature, vol. 4(3), pages 230-240, March.
    3. Serdar Yilmaz & Senel Cobaner & Emine Yalaz & Bahman Amini Horri, 2022. "Synthesis and Characterization of Gadolinium-Doped Zirconia as a Potential Electrolyte for Solid Oxide Fuel Cells," Energies, MDPI, vol. 15(8), pages 1-14, April.
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