Effect of Ru/CGO versus Ni/CGO Co- Infiltration on the Performance and Stability of STN-Based SOFCs

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Electrolyte supported cells (ESC), with Sc2O3-stabilized ZrO2 (ScSZ) electrolytes, Gd-doped ceria (CGO) or M/CGO (M = Ni, Ru) infiltrated Sr0.94Ti0.9Nb0.1O3 (STN94) anodes and LSM/YSZ cathodes, were evaluated for their initial performance and long-term stability. Power density for the Ru/CGO infiltrated cell reached ∼0.7 W cm–2 at 850 °C, 4% H2O/H2, whereas the Ni/CGO infiltrated cell reached ∼0.3 W cm–2, with the current morphologies and loadings. Operation at 0.125 A cm–2, 850 °C, feeding 50% H2O/H2 to the anode and air to the cathode, for a period >300 h, showed superior stability for the Ru/CGO infiltrated cell, with ∼0.04 mV h–1 degradation rate, when compared to the Ni/CGO infiltrated cell (∼0.5 mV h–1). For the Ni/CGO case, the observed degradation has been tentatively linked to initial changes in the electrochemical active area and longterm detrimental interactions between components.
Original languageEnglish
JournalFuel Cells
Volume14
Issue number6
Pages (from-to)1062-1065
ISSN1615-6846
DOIs
Publication statusPublished - 2014
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Electrocatalysts, Infiltration, Performance, Solid Oxide Fuel Cells, Stability
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