Dutta , Atanu and Götz, H and Ghosh, Saswati and Basu, Rajendra Nath (2009) Combustion synthesis of La0.6Sr0.4CO 0.98Ni0.02O3 cathode and evaluation of its electrical and electrochemical properties for IT-SOFC. ECS Transactions, 25 (2 Pt 3). pp. 2657-2666. ISSN 1938-5862

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Abstract

Nanocrystalline powder (30-40 nm) of 2 mol% Ni-doped lanthanum strontium cobaltite (La0.6Sr0.4Co0.98Ni0.02O3) was synthesized by combustion technique using glycine as fuel with various combinations of fuel to nitrate ratios. The thermal analysis revealed that the crystallization process is not single step and remained incomplete even up to 700{degree sign}C. In XRD analysis, existence of two minor phases was observed in addition to lanthanum strontium cobaltite phase. One particular synthesis condition i.e., with a slightly fuel excess ratio (0.45) showed highest electrical conductivity of 96 S/cm at 800{degree sign}C in air. For the application as cathode in SOFC, this material was studied in the symmetric cell mode with Gd-doped CeO2 as electrolyte and it showed lowest interfacial polarization resistance of 0.158 •cm2 when sintered at 1000{degree sign}C. Significantly high current density of ~ 3.4 A/cm2 and power density of ~ 2.4 W/cm2 at 800{degree sign}C was obtained with this cathode in anode-supported single cell with doped CeO2 as a buffer layer.

Item Type:	Article
Subjects:	Electronics
Divisions:	Fuel Cell and Battery
Depositing User:	Bidhan Chaudhuri
Date Deposited:	06 Mar 2012 13:00
Last Modified:	01 Apr 2016 06:34
URI:	http://cgcri.csircentral.net/id/eprint/1170

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