Open AccessBa0.5Sr0.5Co0.8Fe0.2O3–δ–La0.6Sr0.4Co0.8Fe0.2O3–δ Composite Cathode for Solid Oxide Fuel Cell
Author(s) -
Michał Mosiałek,
A. Kędra,
Marcel Krzan,
Elżbieta Bielańska,
Maciej Tatko
Publication year - 2016
Publication title -
archives of metallurgy and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.258
H-Index - 29
eISSN - 2300-1909
pISSN - 1733-3490
DOI - 10.1515/amm-2016-0243
Subject(s) - cathode , materials science , solid oxide fuel cell , scanning electron microscope , microstructure , dielectric spectroscopy , electrolyte , composite number , electrochemistry , analytical chemistry (journal) , oxide , electrode , composite material , metallurgy , chemistry , chromatography
Composite cathodes contain Ba0.5Sr0.5Co0.8Fe0.2O3–δ and La0.6Sr0.4Co0.8Fe0.2O3–δ were tested in different configuration for achieving cathode of area specific resistance lower than Ba0.5Sr0.5Co0.8Fe0.2O3–δ and La0.6Sr0.4Co0.8Fe0.2O3–δ cathodes. Electrodes were screen printed on samaria-doped ceria electrolyte half-discs and tested in the three electrode setup by the electrochemical impedance spectroscopy. Microstructure was observed by scanning electron microscopy. The lowest area specific resistance 0.46 and 2.77 Ω cm−2 at 700 °C and 600 °C respectively revealed composite cathode contain Ba0.5Sr0.5Co0.8Fe0.2O3–δ and La0.6Sr0.4Co0.8Fe0.2O3–δ in 1:1 weight ratio. The area specific resistance of this cathode is characterized by the lowest activation energy among tested cathodes