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Intermediate temperature SOFC anode component based on A-site deficient La-doped SrTiO3

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Author(s)

C. D. Savaniu, J. T S Irvine

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Abstract

Surface modified A-site deficient lanthanum-doped SrTiO3 (La0.2Sr0.7TiO3) was evaluated as a potential anode component material for intermediate temperatures SOFCs. The reduction of the material has been investigated and results of thermal expansion and conductivity dependence of the oxygen partial pressures are presented revealing a strong dependence of the material's thermal and electrical properties on temperature and atmosphere and the fact that reduction may become more facile as the extent of reduction increases. Button fuel cells were produced by tape casting and impregnation, comprising YSZ electrolyte, a porous, conductive backbone of La0.2Sr0.7TiO3 anode impregnated via solutions with Gd-doped ceria and copper and thin films of La 0.6Sr0.4CoO3 cathode produced in-situ in the fuel cell test experiment. Fuel cells tests using pure, humidified H2 as fuel demonstrated that remarkable power densities in excess of 0.5 W/cm 2 at 750°C can be achieved using these cells with suitable pre-reduction of the titanate material.

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Details

Original languageEnglish
Title of host publicationECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages2213-2222
Number of pages10
Volume25
Edition2 PART 3
DOIs
Publication statusPublished - 1 Dec 2009
Event11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria
Duration: 4 Oct 20099 Oct 2009

Conference

Conference11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
CountryAustria
CityVienna
Period4/10/099/10/09

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