Synthesis and characterization of strontium and iron-doped lanthanum cobaltite nanocrystalline powders for single chamber solid oxide fuel cells

Edoardo Magnone*, Enrico Traversa, Masaru Miyayama

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations

Abstract

Different sets of perovskite-type oxides of general formula La 0.8Sr0.2Co1-xFexO3 (0.0 < × < 1.0) were successfully prepared by the amorphous citrate method. Simultaneous thermogravimetric and differential thermal analysis (TG-DTA) was carried out on the precursor gels to determine the minimum temperature of the oxide formation, which was found to be 600°C. After thermal treatments, samples were characterized by using Induced Couple Plasma (ICP) spectroscopy, X-ray diffraction (XRD) and Scanning Electron Microscope (SEM). Single-phase nanocrystalline powders were obtained with controllable grain size from 10 to 20 run as a function of the iron ratio. ICP results indicate that for the prepared samples the actual metal contents were nearly equal to the nominal values. XRD results showed that La0.8Sr 0.2Co1-xFexO3 compounds possess a rhombohedral to orthorhombic structure, depending on the iron content. Moreover, the perovskite-type nano-powder oxides were characterized as electrodes on Ce0.8Sm0.2O2-x pellets in symmetrical cells, and the electrochemical properties of the electrode/electrolyte interfaces were investigated using electrochemical impedance spectroscopy (EIS).

Original languageEnglish (US)
Pages1617-1626
Number of pages10
StatePublished - Dec 1 2005
Event9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada
Duration: May 15 2005May 20 2005

Other

Other9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
CountryCanada
CityQuebec
Period05/15/0505/20/05

ASJC Scopus subject areas

  • Engineering(all)

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