Influence of Partial Substitution of Ba2+ for Sm3+ on the Structure and Electrochemical Properties of Sm 0.5-xBaxSr0.5Co0.8Fe 0.2O3-δPerovskite

Abstract:

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Sm0.5-xBaxSr0.5Co0.8Fe0.2O3-δ powders were synthesized by a sol-gel method. The crystal structure and thermal expansion coefficient of Sm0.5-xBaxSr0.5Co0.8Fe0.2O3-δ (SBSCF, x=0.00, 0.05, 0.10) were investigated. All samples were the perovskite structure with an orthorhombic symmetry and exhibited a similar thermal expansion behavior. The electrochemical properties of SBSCF-SDC composite cathodes were studied using A.C. impedance method. The substitution of Ba2+ for Sm3+ had a significant effect on the area specific resistance of the composite cathodes. The area specific resistance (ASR) decreased with the increase of Ba2+ substitution. This result suggested that the electrochemical performance of Sm0.5Sr0.5Co0.8Fe0.2O3-δ based cathode improved as Sm3+ is partially substituted by Ba2+.

Info:

Periodical:

Advanced Materials Research (Volumes 239-242)

Edited by:

Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He

Pages:

552-557

DOI:

10.4028/www.scientific.net/AMR.239-242.552

Citation:

Y. H. Wang et al., "Influence of Partial Substitution of Ba2+ for Sm3+ on the Structure and Electrochemical Properties of Sm 0.5-xBaxSr0.5Co0.8Fe 0.2O3-δPerovskite", Advanced Materials Research, Vols. 239-242, pp. 552-557, 2011

Online since:

May 2011

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$35.00

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