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Study on nanocomposites based on carbonate@ceria.

Rizwan Raza1, Ying Ma, Xiaodi Wang

  • 1Department of Energy Technology, Royal Institute of Technology (KTH), 10044 Stockholm, Sweden.

Journal of Nanoscience and Nanotechnology
|April 1, 2010
PubMed
Summary

This study presents a novel carbonate@samarium-doped ceria (SDC) nanocomposite electrolyte for solid oxide fuel cells (SOFCs). This material achieves high power density at low temperatures, advancing fuel cell technology.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Ceria-based composites are promising electrolytes for high-temperature fuel cells (300-600°C).
  • Developing efficient electrolytes for lower operating temperatures is crucial for broader SOFC adoption.

Purpose of the Study:

  • To synthesize and characterize a novel nanocomposite electrolyte based on carbonate and samarium-doped ceria (SDC).
  • To evaluate the performance of the carbonate@SDC electrolyte in single solid oxide fuel cells (SOFCs) at low temperatures.

Main Methods:

  • Co-precipitation method for synthesizing the carbonate@SDC nanocomposite.
  • Characterization using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Brunauer–Emmett–Teller (BET) analysis.

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  • Fabrication and testing of single SOFCs utilizing the synthesized electrolyte.

    • Main Results:

    • The carbonate@SDC material was successfully synthesized as a two-phase nanocomposite.
    • Characterization confirmed an average particle size of approximately 14.5 nm and crystalline sizes between 12-14 nm.
    • SOFCs fabricated with the carbonate@SDC electrolyte exhibited excellent performance, achieving a maximum power density of 1000-1180 mW/cm² at 300-550°C.

    Conclusions:

    • The carbonate@SDC nanocomposite is a highly effective electrolyte for low-temperature SOFCs.
    • The developed material demonstrates significant potential for advancing efficient and cost-effective fuel cell technologies.