Impedance and Stability of M/CGO (M: Ni, Pd, Ru) Co-infiltrated Nb-doped SrTiO3 SOFC Anodes

Tania Ramos, Sune Veltzé, Bhaskar Reddy Sudireddy, Peter Holtappels

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Preliminary impedance and stability of Sr0.94Ti0.9Nb0.1O3-δ/10 vol.% 8YSZ (STN94/YSZ) composite electrodes, M/CGO infiltrated (M: Ni, Pd and Ru), has been evaluated in symmetric configuration, at OCV, under various H2O/H2 atmospheres, with H2O contents between 3–50%, at 650–850°C. Initial total Rp at 850°C, 50% H2O/H2 decreased in the order Ni/CGO≫Pd/CGO > Ru/CGO.
After 200h of exposure Ru/CGO not only continued to exhibit low impedance, with final total Rp ≅ 0.02 Ωcm2, but also negligible degradation. For comparison, Ni/CGO degraded close to a factor of 3 to ca. 0.25 Ωcm2 in an equivalent period. © 2013 The Electrochemical Society.
Original languageEnglish
JournalE C S Electrochemistry Letters
Issue number2
Pages (from-to)F5-F6
Publication statusPublished - 2014

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