Cathodic polarisation of composite LSCF-SDC IT-SOFC electrode synthesised by one-step microwave self-assisted combustion. Issue 5 (May 2019)

• Record Type: Journal Article
• Authors: Loureiro, Francisco J.A.; Macedo, Daniel A.; Nascimento, Rubens M.; Cesário, Moisés R.; Grilo, João P.F.; Yaremchenko, Aleksey A.; Fagg, Duncan P.
• Is Part Of: Journal of the European Ceramic Society. Volume 39:Issue 5(2019)
• Page Start: 1846
• Page End: 1853
• Publication Date: 2019-05
• Subjects: Cathodic polarisation -- LSCF-SDC -- Impedance spectroscopy -- One-step microwave self-assisted combustion -- SOFC cathode; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2019.01.013
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Nano-sized composite La0.6 Sr0.4 Co0.2 Fe0.8 O3-δ (LSCF)-Ce0.8 Sm0.2 O1.9 (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 Ce0.8 Gd0.2 O1.9 (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 °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.