Al-Doped (La,Sr)TiO(3+delta) Anodes for the Direct Oxidation of Methane in SOFCs

D. N. Miller*, J. T. S. Irvine

*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Perovskite (La,Sr)TiO(3+delta) compounds have been identified as suitable materials for solid oxide fuel cell (SOFC) anodes, due to their high conductivity and stability in reducing conditions. Additionally, when using hydrocarbon fuels, these materials have been proven resistant to carbon deposition. Previous research has shown that the fuel cell performance can be significantly improved by replacing the titanium on the perovskite B-site with other elements. (La,Sr)TiO(3+delta) compounds, doped with aluminium, were synthesised by solid state reaction. Structural analysis, by XRD and TEM, revealed the structure of these compounds varies with the aluminium content and the amount of oxygen excess (delta). The electrical properties of these materials were analysed using A.C. impedance and four point D.C. conductivity measurements. The conductivity of the compounds was shown to be dependent on the structure. The use of these materials as anodes, in preliminary fuel cell tests has revealed that some compositions have catalytic activity for the direct oxidation of methane. Open cell potentials as high as 1.14V were obtained at 950 degrees C.

Original languageEnglish
Title of host publicationSOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2
EditorsK Eguchi, SC Singhai, H Yokokawa, H Mizusaki
Place of PublicationPENNINGTON
PublisherELECTROCHEMICAL SOCIETY INC
Pages1447-1454
Number of pages8
ISBN (Print)978-1-56677-554-0
DOIs
Publication statusPublished - 2007
Event10th International Symposium on Solid Oxide Fuel Cells - Nara, Japan
Duration: 3 Jun 20078 Jun 2007

Publication series

NameECS Transactions
PublisherELECTROCHEMICAL SOCIETY INC
Volume7
ISSN (Print)1938-5862

Conference

Conference10th International Symposium on Solid Oxide Fuel Cells
Country/TerritoryJapan
CityNara
Period3/06/078/06/07

Keywords

  • TEMPERATURE FUEL-CELLS
  • PEROVSKITE
  • LA4SRN-4TINO3N+2 SERIES
  • EXTENDED DEFECTS

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