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 |
isbn |
1873-619X |
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
|