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Effect of Co Co-Doping on the Electrical Conductivity of Ce_0.9Sm_0.1O_2-δ

M.J. Pawar, S.S. Chaure, S.B. Deshmukh

Laboratory of Materials Synthesis, Department of Chemistry, ACS College, Amravati, India, 444602

received March 23, 2010, received in revised form May 26, 2010, accepted May 30, 2010

Vol.1, No.1, Pages 27-31   DOI: 10.4416/JCST2010-00006

Abstract

The influence of cobalt doping on the densification and activation energy of Ce_0.9Sm_0.1O_2-δ was studied. Solid solutions of Ce_0.9-xCo_xSm_0.1O_2-δ (x = 0, 0.05, 0.1 and 0.15) were prepared by means of a modified EDTA-glycol method. It was found that the degree of densification increases with an increasing concentration of cobalt. Almost full densification could be achieved at a sintering temperature of 1500 °C. The highest density (99.3 %) and minimum activation energy (0.81 eV) were observed for the composition Ce_0.8Co_0.1Sm_0.1O_2-δ.

Keywords

SOFC; ceria; EDTA-glycol method; co-dopant; solid electrolytes

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Copyright

© 2010 Göller Verlag

Acknowledgments

The author is grateful to the Department of Metallurgy and Material Science Engineering, VNIT Nagpur for permitting the use of the XRD and SEM measurements.