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1 Department of Energy Conversion and Storage, Technical University of Denmark 2 Applied Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark 3 Fundamental Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark 4 Universidad del Pais Vasco 5 Risø National Laboratory for Sustainable Energy, Technical University of Denmark 6 CIC energiGUNE
Electrolyte supported symmetric cells featuring La0.6Ca 0.4Fe0.8Ni0.2O3 (LCFN) electrodes are studied by electrochemical impedance spectroscopy. The aim is to describe the polarization losses of this mixed ionic electronic conductor electrode at various cell operating conditions for cells sintered at different temperatures. An equivalent circuit describing the cathode polarization resistances was constructed from analyzing impedance spectra recorded at different oxygen partial pressures and temperatures. Favorable oxygen reduction reaction properties are demonstrated for the LCFN cell sintered at 750 C with a polarization resistance of 0.05 Ω cm2 at an operating temperature of 800 C in pure oxygen. © 2013 Elsevier B.V. All rights reserved.
Journal of Power Sources, 2013, Vol 239, p. 196-200
Calcium; Electrochemical impedance spectroscopy; Electrolytic reduction; Electrophoretic coatings; Nickel; Sintering; Solid oxide fuel cells (SOFC); Spectroscopy; Cathodes
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