Research of carbon deposition formation and judgment in Cu-CeO 2-ScSZ anodes for direct ethanol solid oxide fuel cells

We have been researching Solid oxide fuel cells (SOFCs) with Cu-CeO 2-ScSZ (scandia stabilized zirconia) anodes operating directly on ethanol fuels in recent years. In this paper, Cu-CeO 2-ScSZ anodes with different Cu/CeO 2 composition are fabricated by dry pressing, sintering and wet impregnation...

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Published inInternational journal of hydrogen energy Vol. 37; no. 1; pp. 505 - 510
Main Authors Ye, Xiao-Feng, Zhou, J., Wang, S.R., Zeng, F.R., Wen, T.L., Zhan, Z.L.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2012
Subjects
Anode
Carbon deposition
Degradation
Ethanol
Degradation
Carbon deposition
Anode
Ethanol
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Summary:We have been researching Solid oxide fuel cells (SOFCs) with Cu-CeO 2-ScSZ (scandia stabilized zirconia) anodes operating directly on ethanol fuels in recent years. In this paper, Cu-CeO 2-ScSZ anodes with different Cu/CeO 2 composition are fabricated by dry pressing, sintering and wet impregnation technologies. The photographs and SEM images of these samples after exposure to ethanol fuels for 300 h are observed to characterize their carbon deposition behaviors. The different deposited carbon morphologies in the anodes with different compositions are recorded, and possible reaction mechanisms and prevention methods are discussed. Based on these results; we demonstrate the carbon deposition behaviors and degradation reasons for the single cell running in ethanol fuels. ► The deposited carbon morphologies in Cu-CeO 2-ScSZ anodes were recorded. ► Several strategies were provided to prevent carbon deposition. ► These results help to justify whether there are carbon depositions in the anodes. ► Co and Ni were added to improve anode performances.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2011.09.017