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Journal of the Australian Ceramic Society

, Volume 55, Issue 1, pp 123–133 | Cite as

Microstructure tailoring of combustion-derived Ni-GDC and Ni-SDC composites as anode materials for intermediate temperature solid oxide fuel cells

  • Tina Skalar
  • Klementina Zupan
  • Marjan MarinšekEmail author
Research
  • 52 Downloads

Abstract

The Ni-GDC and Ni-SDC cermets with tailored microstructures are potential candidates for anode materials in intermediate temperature SOFCs. In this work, a modified citrate-nitrate combustion synthesis was employed for the preparation of cermets. It was demonstrated that the preparation technique ensured randomly distributed phases of NiO and GDC or SDC on a nanometre scale. Microstructure analysis revealed that during sintering under various conditions (from 1150 to 1400 °C), the NiO phase grew faster than the GDC or SDC phases; however, phases remained well within the sub-micrometre range. In order to describe the overall relative electrical conductivity of the cermets, the sine-wave approximation of conductivity change for porous materials was used. Higher relative densities of the cermets resulted in improved electrical conductivity. The most appropriate sintering temperature, which ensured relatively small grains and at the same time sufficiently high electrical conductivity, for both materials was determined to be 1200 °C.

Keywords

Solid oxide fuel cell Combustion synthesis Microstructure development Electrical properties 

Notes

Acknowledgments

This work was supported by the Ministry of Higher Education, Science and Technology of the Republic of Slovenia through grants P1–0175.

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Copyright information

© Australian Ceramic Society 2018

Authors and Affiliations

  • Tina Skalar
    • 1
  • Klementina Zupan
    • 1
  • Marjan Marinšek
    • 1
    Email author
  1. 1.Faculty of Chemistry and Chemical TechnologyUniversity of LjubljanaLjubljanaSlovenia

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