Kumar, A and Sujatha Devi, P (2011) New cathode compositions based on La(0.84)Sr(0.16)Mn(1-x)M(x)O(3), where M = Al, Ga for solid oxide fuel cell. Materials Research Bulletin, 46 (2). pp. 303-307. ISSN 0025-5408

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Abstract

In order to identify new cathode compositions for the high temperature solid oxide fuel cell, we have investigated the effect of the trivalent cations Al and Ga at the Mn site of the well-studied cathode composition La(0.84)Sr(0.16)MnO(3). All the compositions have been prepared by the low temperature citrate-nitrate auto-ignition process and sintered within the temperature range of 1150-1350 degrees C for 4 h. In order to understand the compatibility of the prepared samples as alternative cathode materials, we compared their electrical conductivity and thermal expansion coefficient with those of La(0.84)Sr(0.16)MnO(3) and yttria-stabilized zirconia. A 10 mol% Al doped La(0.84)Sr(0.16)MnO(3) composition exhibited a conductivity of around 122 S cm(-1) at 950 degrees C and a thermal expansion coefficient of 11.04 x 10(-6) K with a minimum reactivity towards yttria-stabilized zirconia. Though the conductivity of the new composition is lower than that of La(0.84)Sr(0.16)MnO(3) (169 S cm(-1) at 950 degrees C), it is still high enough for use as a cathode material. (C) 2010 Elsevier Ltd. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Chemical synthesis; Electrical properties; Thermal expansion; Oxides
Subjects:	Electronics
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	16 Jan 2012 12:13
Last Modified:	19 Mar 2012 05:45
URI:	http://cgcri.csircentral.net/id/eprint/272

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