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Synthesis and Characterization of Gadolinium-Doped Zirconia as a Potential Electrolyte for Solid Oxide Fuel Cells

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  • Serdar Yilmaz

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

  • Senel Cobaner

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

  • Emine Yalaz

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

  • Bahman Amini Horri

    (Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, UK)

Abstract

Zirconia-based composites with high thermochemical stability and electrochemical activity are the most promising solid electrolytes for manufacturing solid oxide fuel cells (SOFCs). In the present work, nanocrystalline composite powders of gadolinium-doped zirconia (GDZ: Gd 2 x Zr 2(1− x ) O 4− x ) with various doping fractions (0.01 ≤ x ≤ 0.16) were synthesized by the Pechini method and applied for the fabrication of several electrolyte pellets to evaluate their physicochemical properties, sinterability, and conductivity. The X-ray diffraction (XRD) patterns and the thermogravimetry/differential thermal analysis (TGA/DTA) of the synthesized powders confirmed the successful formation of nanocrystalline GDZ in the tetragonal phase with complete substitution of gadolinium phase into the zirconia (ZrO 2 ) lattice. The synthesized gadolinium zirconate powders were then shaped into pellet forms using the tape casting method, followed by sintering at 1300 °C (for 2.5 h). The microstructural analysis of the electrolyte pellets showed suitable grain boundary welding at the surface with an acceptable grain growth at the bulk of the T-phase GDZ samples. The impedance measurements indicated that the T-phase GDZ-8 could provide a comparably higher ionic conductivity (with 7.23 × 10 −2 S/cm in the air at 800 °C) than the other dopant fractions. The results of this work can help better understand the characteristics and electrochemical performance of the T-phase gadolinium zirconate as a potential electrolyte for the fabrication of SOFCs.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:8:p:2826-:d:792629
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    References listed on IDEAS

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    1. Luca Del Zotto & Andrea Monforti Ferrario & Arda Hatunoglu & Alessandro Dell’Era & Stephen McPhail & Enrico Bocci, 2021. "Experimental Procedures & First Results of an Innovative Solid Oxide Fuel Cell Test Rig: Parametric Analysis and Stability Test," Energies, MDPI, vol. 14(8), pages 1-19, April.
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    Cited by:

    1. 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.
    2. Mohsen Fallah Vostakola & Hasan Ozcan & Rami S. El-Emam & Bahman Amini Horri, 2023. "Recent Advances in High-Temperature Steam Electrolysis with Solid Oxide Electrolysers for Green Hydrogen Production," Energies, MDPI, vol. 16(8), pages 1-50, April.

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