Physical Properties of Sr3Fe2-xCoxO7-δ (x = 0 - 1.0) as SOFC Anode

Abstract:

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The Ruddlesden-Popper (RP) compounds, Sr3Fe2O7-δ, RP n = 2, were synthesized by citrate gel method. Co was selected as dopant and substituted on Fe-site. Thermal decomposition behaviour and phase analysis of Sr3Fe2-xCoxO7-δ (x = 0 - 1.0) were characterized using Simultaneous TGA-DTA analyzer (STA) and X-ray diffractometer (XRD), respectively. The result showed a single phase obtained from the doped compositions after calcination at 1200°C. The microstructure of sintered compositions characterized using Scanning Electron Microscope (SEM) showed the porous structure as a requirement for anode material. The highest electrical conductivity in this work was obtained from Sr3FeCoO7-δ. The oxidation states of Co in Sr3Fe2-xCoxO7-δ compositions investigated by X-ray absorption near edge structure (XANES) technique were found to be +2 and +3 due to the Co K-edge energies existing between these of Co2+ and Co3+.

Info:

Periodical:

Advanced Materials Research (Volumes 93-94)

Edited by:

S. Suttiruengwong and W. Sricharussin

Pages:

549-552

DOI:

10.4028/www.scientific.net/AMR.93-94.549

Citation:

P. Sittipon and S. Kuharuangrong, "Physical Properties of Sr3Fe2-xCoxO7-δ (x = 0 - 1.0) as SOFC Anode", Advanced Materials Research, Vols. 93-94, pp. 549-552, 2010

Online since:

January 2010

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$35.00

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