Engineering composite oxide SOFC anodes for efficient oxidation of methane

G. Kim, G. Corre, J. T. S. Irvine, J. M. Vohs, R. J. Gorte

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138 Citations (Scopus)

Abstract

Ceramic anodes for solid oxide fuel cells (SOFCs) were prepared by aqueous impregnation of nitrate salts to produce composites with 45 wt % La0.8Sr0.2Cr0.5Mn0.5O3 (LSCM ) in a 65% porous yttria-stabilized zirconia (YSZ) scaffold. Scanning electron micrographs indicate that the LSCM coats the YSZ pores following calcination at 1473 K. Composites produced in this manner exhibit conductivities at 1073 K of approximately 1 S/cm in air and 0.1 S/cm in humidified H2. A SOFC with a composite anode composed of 45 wt % LSCM, 0.5 wt % Pd, and 5 wt % ceria exhibited maximum power densities at 1073 K of 1.1 and 0.71 W cm-2 in humidified (3% H2O) H2 and methane, respectively. (c) 2007 The Electrochemical Society.

Original languageEnglish
Pages (from-to)B16-B19
Number of pages4
JournalElectrochemical and Solid-State Letters
Volume11
Issue number2
Early online date30 Nov 2007
DOIs
Publication statusPublished - 2008

Keywords

  • FUEL-CELLS
  • PEROVSKITE ANODE
  • HIGH-PERFORMANCE
  • CERMET ANODES
  • CATHODES
  • YSZ
  • INFILTRATION
  • FABRICATION
  • ELECTRODES

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