Cathodic polarisation of composite LSCF-SDC IT-SOFC electrode synthesised by one-step microwave self-assisted combustion
authors Loureiro, FJA; Macedo, DA; Nascimento, RM; Cesario, MR; Grilo, JPF; Yaremchenko, AA; Fagg, DP
nationality International
journal JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
author keywords Cathodic polarisation; LSCF-SDC Impedance spectroscopy; One-step microwave self-assisted combustion; SOFC cathode
keywords OXIDE FUEL-CELLS; SURFACE EXCHANGE KINETICS; OXYGEN REDUCTION; ELECTROCHEMICAL PERFORMANCE; ELECTRICAL-PROPERTIES; TEMPERATURE; DIFFUSION; IMPEDANCE; TRANSPORT; LA0.6SR0.4CO0.2FE0.8O3-DELTA
abstract Nano-sized composite La0.6Sr0.4Co0.2Fe0.8O3.8 (LSCF)-Ce0.8Sm0.2O1.9 (SDC) powder was synthesised by one-step microwave self-assisted combustion synthesis and characterized by X-ray diffraction and transmission electron microscopy. Electrochemical performance of composite LSCF-SDC cathode in contact with Ce0.8Gd0.2O1.9 (GDC) solid electrolyte under steady state polarisation was studied employing electrochemical impedance spectroscopy in 3-electrode cell configuration. The evolution of elementary steps of oxygen reduction reaction was analysed under cathodic polarisation in potentiostatic mode (up to 0.8 V) in the temperature range 650-750 degrees C. The composite LSCF-SDC cathode prepared by one-step microwave combustion route demonstrated a lower overall polarisation resistance when compared to literature reports of similar cathodes produced by other synthesis routes.
publisher ELSEVIER SCI LTD
issn 0955-2219
year published 2019
volume 39
issue 5
beginning page 1846
ending page 1853
digital object identifier (doi) 10.1016/j.jeurceramsoc.2019.01.013
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000459950700013
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