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http://dx.doi.org/10.4191/KCERS.2008.45.1.788

Long-term Testing and Analysis of a ScSZ/LaSrCuFe Cell  

Wackerl, Jurgen (Forshungszentrum Julich GmbH)
Peck, Dong-Hyun (Korea Institute of Energy Research)
Markus, Torsten (Forshungszentrum Julich GmbH)
Publication Information
Journal of the Korean Ceramic Society / v.45, no.12, 2008 , pp. 788-795 More about this Journal
Abstract
An electrolyte supported SOFC cell was tested at $800^{\circ}C$ in air for 3600 h with an applied current density of $200\;mA/cm^2$ to examine possible cathode degradation issues. A scandium- stabilized zirconia (ScSZ) with additional manganese doping (ScSZ: Mn) was used as electrolyte. A strontium and copper-doped lanthanum ferrite (LaSrCuFe) and platinum were used as cathode and quasi-anode material, respectively. The DC resistance was logged over the complete testing period. Additionally, impedance spectroscopy was used from time to time to track changes of the cell in-situ. Post-test analysis of the cell using methods like scanning electron microscopy imaging and other electrochemical testing methods allow the identification of different degradation sources. The results indicate a promising combination of electrolyte and cathode material in terms of chemical compatibility and electrical performance.
Keywords
Scandia doped zirconia; Perovskite; Degradation; Cell test; Impedance spectroscopy;
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