A Preliminary Study on WO3‐Infiltrated W–Cu–ScYSZ Anodes for Low Temperature Solid Oxide Fuel Cells

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Preparation and electrochemical characterization of WO3‐infiltrated 0.48W–0.52Cu–ScYSZ (WCS) anode for solid oxide fuel cell are reported. The DC conductivity of a WO3 ceramic was 1,200 and 24 S cm–1 in reducing and oxidizing atmospheres, respectively, at 650 °C. WCS porous backbones in the form of symmetric cells were prepared by screen printing of WO3–CuO–ScYSZ ink and subsequent sintering at 1,300 °C for 1 h in 9% H2/N2. Analysis of the sintered backbone by X‐ray diffraction showed the metallic W and Cu phases. Precursor solutions of WO3 or CuO were infiltrated into porous WCS backbones to form the anode. The electrochemical performance of these anodes measured by impedance spectroscopy showed polarization resistances of 11 and 6.5 Ω cm2 for WO3 and CuO infiltrated anodes, respectively, at 600 °C in humidified hydrogen. Activation energy values of 86.8 and 96.5 kJ mol–1 were obtained for WO3 and CuO infiltrated WCS anodes, respectively. The microstructure of the tested anodes showed well‐dispersed sub‐micron particles of WO3 in the WCS backbone whereas CuO infiltration resulted in a dense microstructure.
Original languageEnglish
JournalFuel Cells
Publication date2012
Volume12
Journal number4
Pages530-536
ISSN1615-6846
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 2

Keywords

  • Infiltration, Low Temperature SOFC Anodes, Tungsten Oxide
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