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<p>The presented electrolyte material Ni<sub><i>x</i></sub>Sm<sub>0.2-<i>x</i></sub>Ce<sub>0.8</sub>O<sub>2-<i>δ</i></sub> (Ni-SDC, <i>x</i> = 0-0.1) for solid oxide fuel cells (SOFCs) was synthesized via the sol–gel method. X-ray diffraction (XRD) analysis confirmed that the samples crystallized in a cubic fluorite structure after being calcined at 750&#xa0;°C. Scanning electron microscopy (SEM) images revealed a dense microstructure following sintering at 1250&#xa0;°C. Electrochemical tests demonstrated that the conductivity was effectively enhanced by doping with an appropriate amount of Ni, reaching a maximum value of 0.065S/cm at 800&#xa0;°C when <i>x</i> = 0.05. In summary, nickel doping improved the conductivity of samarium-doped ceria, indicating its promise as an electrolyte material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).</p>

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Investigation of Samarium and Nickel Co-Doped-CeO2 Electrolyte for Solid Oxide Fuel Cells

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Ming Wang,
  • Xuhang Zhu,
  • Jihai Cheng

摘要

The presented electrolyte material NixSm0.2-xCe0.8O2-δ (Ni-SDC, x = 0-0.1) for solid oxide fuel cells (SOFCs) was synthesized via the sol–gel method. X-ray diffraction (XRD) analysis confirmed that the samples crystallized in a cubic fluorite structure after being calcined at 750 °C. Scanning electron microscopy (SEM) images revealed a dense microstructure following sintering at 1250 °C. Electrochemical tests demonstrated that the conductivity was effectively enhanced by doping with an appropriate amount of Ni, reaching a maximum value of 0.065S/cm at 800 °C when x = 0.05. In summary, nickel doping improved the conductivity of samarium-doped ceria, indicating its promise as an electrolyte material for intermediate-temperature solid oxide fuel cells (IT-SOFCs).