Pal, P and Raja, M W and Mukhopadhyay, Jayanta and Dutta, A and Mahanty, Sourendra and Basu, Rajendra Nath and Maiti, Himadri Sekhar (2007) Alanine Assisted Low-Temperature Synthesis and Characterization of Nanocrystalline SOFC Cathodes. ECS Transactions, 7 (1Pt 1). pp. 1129-1138. ISSN 1938-5862

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Abstract

Nanocrystalline SOFC cathode materials of perovskite family, La(1-x)Sr(x)M(1-y)Co(y)O(3), where 0<x <= 0.5, 0<y <= 0.8 (M is transitional metal=Mn or Fe) have been synthesized at a relatively low temperature by combustion technique using alanine as novel fuel. The thermal analyses of the precursor gels show sharp single step combustion with low decomposition temperature (170-200 degrees C). Detailed X-ray powder diffraction analyses show 47-96% phase purity in the assynthesized powder and upon calcination at temperature similar to 825 degrees C, single phase material is obtained wherein the nanocrystallinity (crystallite size similar to 19-24 nm) is retained. Densification studies of the materials are carried out within 900-1100 degrees C. The coefficient of thermal expansion (CTE) of the sintered cathodes is also measured. Detailed electrical characterizations of the sintered cathodes are evaluated and correlated with the microstructures. The electrochemical performances of SOFC single cells (Ni-YSZ anode-support /YSZ similar to 20 mu m/LaFeO(3)-based cathodes) with ceria interlayer show high current density of similar to 1.2 A/cm(2) at 0.7 V at 800 degrees C.

Item Type:	Article
Additional Information:	10th International Symposium on Solid Oxide Fuel Cells, SOFC-X; Nara, Japan, JUN 03-08,2007
Subjects:	Electronics
Divisions:	Fuel Cell and Battery
Depositing User:	Namita Dutta
Date Deposited:	01 Feb 2012 12:43
Last Modified:	06 Jun 2016 06:13
URI:	http://cgcri.csircentral.net/id/eprint/529

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