Journal article
Effect of Ru/CGO versus Ni/CGO Co- Infiltration on the Performance and Stability of STN-Based SOFCs
Department of Energy Conversion and Storage, Technical University of Denmark1
Fundamental Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark2
Ceramic Engineering & Science, Department of Energy Conversion and Storage, Technical University of Denmark3
Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark4
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.
Language: | English |
---|---|
Publisher: | WILEY‐VCH Verlag |
Year: | 2014 |
Pages: | 1062-1065 |
ISSN: | 16156854 and 16156846 |
Types: | Journal article |
DOI: | 10.1002/fuce.201400013 |
ORCIDs: | Ramos, Tania , Veltzé, Sune , Sudireddy, Bhaskar Reddy , Jørgensen, Peter Stanley , Kuhn, Luise Theil and Holtappels, Peter |