Samsonnesaraj, A. and AmIraj, I. and Pattabiraman, R. (2007) Synthesis and characterization of LaCo03 based cathode and its chemical compatibility with Ce02 based electrolytes for intermediate temperature solid oxide fuel cell (ITSOFC). Indian Journal of Chemical Technology, 14. pp. 154-160. ISSN 0971-457X

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Abstract

The use of alternate cathode materials with improved performance and without any chemical reaction with adjoining electrolyte is required for a reduction in operating temperature of SOFC from 1273 K to about 1073 K (lTSOFC). Cobalt containing perovskite oxides such as LaCoOJ tend to exhibit a higher ionic conductivity due to a greater concentration of oxygen vacancies than other perovskite oxides. The mixed ionic and electronic conducting cathode of the Lal_xSr,CoOJ_o systems has shown the lowest cathodic overpotential for an SOFC air electrode. In this research work, fine powders of Lau.70SrO.JOCoOJ_o (LSC) cathode and Ceo.90Gdo.1002_o (GOC) and Ce080SmO.2002-5 (SOC) are synthesized by glycine nitrate combustion synthesis and systematically characterized by XRO and panicle characteristics. The electrical properties or LSC cathode and GOC and SOC electrolytes are also studied. I3ut, the crucial requirement for applicability of LSC cathode is its chemical compatibility in conjunction with the alternate solid electrolytes, GOC and SOC without any phase formation. The XRO studies showed no reaction products when the LaO.70SrO.JOCoOJ_o cathode is mixed and calcined with GOC and SOC electrolyte at 1573 K. Hence, the LSC cathode may be combined with Ce02 based electrolytes in ITSOFC application.

Item Type:	Article
Uncontrolled Keywords:	Solid oxide fuel cell; Perovskite oxide; Intermediate temperature
Subjects:	Fuel Cells
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	21 Feb 2012 06:58
Last Modified:	21 Feb 2012 06:58
URI:	http://cecri.csircentral.net/id/eprint/662

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