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