authors |
Santos, JRD; Loureiro, FJA; Grilo, JPF; Silva, VD; Simoes, TA; Fagg, DP; Macedo, DA |
nationality |
International |
journal |
ELECTROCHIMICA ACTA |
author keywords |
Cathodic polarisation; [Ca2CoO3-delta](q)[CoO2]; Impedance spectroscopy; Proteic sol-gel synthesis; SOFC cathode |
keywords |
SOL-GEL SYNTHESIS; ELECTROCHEMICAL PERFORMANCE; THERMOELECTRIC PROPERTIES; COMPOSITE CATHODES; COBALT OXIDE; CA-COBALTITE; O SYSTEM; TEMPERATURE; CALCINATION; KINETICS |
abstract |
Pure phase misfit Ca-cobaltite powder, [Ca2CoO3-delta](q)[CoO2] (C349), was successfully synthesised by the proteic sol-gel synthesis route and characterised by X-ray diffraction. The electrochemical performance of the C349 cathode screen-printed onto Ce0.9Gd0.1O1.95 (GDC) solid electrolyte was studied employing electrochemical impedance spectroscopy in 3-electrode cell configuration. Cathodic polarisation was evaluated in potentiostatic mode in the temperature range 550-700 degrees C. The C349 cathode prepared by proteic sol-gel synthesis route demonstrates lower polarisation resistances than similar misfit Ca-cobaltite compositions reported in the literature, produced by different synthetic approaches. A highly competitive performance of the formed C349 cathode is also highlighted upon comparison to typical SOFC cathodes under applied DC bias. (C) 2018 Elsevier Ltd. All rights reserved. |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
issn |
0013-4686 |
year published |
2018 |
volume |
285 |
beginning page |
214 |
ending page |
220 |
digital object identifier (doi) |
10.1016/j.electacta.2018.08.018 |
web of science category |
Electrochemistry |
subject category |
Electrochemistry |
unique article identifier |
WOS:000445131700023
|