Synthesis, Electrical Conductivity and Electrochemical Properties of SrFe_1−xSb_xO_3−δ as Cathode Materials for IT-SOFCs

Abstract:

Fe-based perovskite oxides SrFe_1-xSb_xO_3-δ (SFS, x = 0.05–0.15) have been prepared by a solid-state reaction and studied as novel cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). As SOFC cathodes, the highest electrical conductivity of 100 S cm⁻¹ at 425 oC in air was obtained for the x = 0.05 sample. The area-specific resistances of the SFS ( x = 0.05) cathode on the LSGM electrolyte where at 700 oC is 0.17 Ω cm². All these results demonstrates that Sb-substituted SFS perovskites materials are promising cheaper alternative cathodes for an IT-SOFC.

• Periodical: Applied Mechanics and Materials (Volumes 672-674)
• Pages: 696-699
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.672-674.696
• Online since: October 2014
• Authors: Xiu Ling Yu, Xue Li
• Keywords: Cathode, Electrical Conductivity, Electrochemical Performance, Solid Oxide Fuel Cell, Strontium Ferrite

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DOI: 10.1016/j.jpowsour.2008.12.138