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Single-Chamber SOFCs with a Ce[sub 0.9]Gd[sub 0.1]O[sub 1.95] Electrolyte Film for Low-Temperature Operation

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jan 2005Publisher:The Electrochemical SocietyJournal:Electrochemical and Solid-State Letters, volume 8, page A63 (issn: 1099-0062,

Authors: Mitsuru Sano; Masahiro Nagao; Takashi Hibino; Daisuke Hirabayashi; Atsuko Tomita;

doi: 10.1149/1.1836120

Single-Chamber SOFCs with a Ce[sub 0.9]Gd[sub 0.1]O[sub 1.95] Electrolyte Film for Low-Temperature Operation

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Abstract

Single-chamber solid oxide fuel cells (SOFCs) with an anode-supported Ce 0 . 9 Gd 0 . 1 O 1 . 9 5 electrolyte were operated in a mixture of butane and air at furnace temperatures of 200-300°C. The electromotive force (emf) of the cell and the voltage drop were strongly influenced by the catalytic activity of the anode for the partial oxidation of butane. The promotion of hydrogen formation by the addition of Ru to the anode caused an increase in the emf and a reduction in the voltage drop. As a result, stable power densities of 44 and 176 mW cm - 2 were obtained at 200 and 300°C, respectively.

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Keywords

solid oxide fuel cells, catalysis, oxidation, electric potential, solid electrolytes, electrochemical electrodes

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