|
authors |
Munoz-Gil, D; Perez-Coll, D; Urones-Garrote, E; Amador, U; Garcia-Martin, S |
|
nationality |
International |
|
journal |
JOURNAL OF MATERIALS CHEMISTRY A |
|
keywords |
FAST OXYGEN DIFFUSION; LAYERED PEROVSKITE; ELECTROCHEMICAL PROPERTIES; ELECTRICAL-PROPERTIES; POWDER DIFFRACTION; PHASE-TRANSITION; CATHODE MATERIAL; GDBACO2-XFEXO6-DELTA; PRBACO2O5+DELTA; GDBACO2O5+X |
|
abstract |
The influence of the synthesis conditions on the crystal structure and properties of the oxides of the system GdBaCo2-xFexO5+delta is reported in this article. The materials are prepared by a ceramic method either in air or in an argon atmosphere. Crystal structure characterization is carried out by a combination of powder X-ray diffraction (PXRD) with advanced methods of high resolution transmission electron microscopy (HRTEM), scanning-transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS). Thermal expansion coefficients of the oxides decrease with increasing substitution of Co by Fe. Impedance spectroscopy analysis of symmetrical cells using these materials as electrodes reveals area-specific polarization resistance (ASR) values low enough for the use of the oxides as air electrodes in intermediate temperature solid oxide fuel cells (IT-SOFCs). |
|
publisher |
ROYAL SOC CHEMISTRY |
|
issn |
2050-7488 |
|
year published |
2017 |
|
volume |
5 |
|
issue |
24 |
|
beginning page |
12550 |
|
ending page |
12556 |
|
digital object identifier (doi) |
10.1039/c7ta02671d |
|
web of science category |
Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary |
|
subject category |
Chemistry; Energy & Fuels; Materials Science |
|
unique article identifier |
WOS:000403664800063
|
