Engineering Composite Oxide SOFC Anodes for Efficient Oxidation of Methane | Zendy

Guntae Kim | Zendy; Gaël Corre | Zendy; John T. S. Irvine | Zendy; John M. Vohs | Zendy; Raymond J. Gorte | Zendy

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Engineering Composite Oxide SOFC Anodes for Efficient Oxidation of Methane

Author(s) -

Guntae Kim,

Gaël Corre,

John T. S. Irvine,

John M. Vohs,

Raymond J. Gorte

Publication year - 2007

Publication title -

electrochemical and solid-state letters

Language(s) - English

Resource type - Journals

eISSN - 1944-8775

pISSN - 1099-0062

DOI - 10.1149/1.2817809

Subject(s) - materials science , yttria stabilized zirconia , calcination , methane , anode , cubic zirconia , composite number , oxide , chemical engineering , porosity , aqueous solution , ceramic , solid oxide fuel cell , composite material , scanning electron microscope , catalysis , metallurgy , electrode , chemistry , organic chemistry , engineering

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.

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