Influence of the synthesis conditions on the crystal structure and properties of GdBaCo2-xFexO5+delta oxides as air-electrodes for intermediate temperature solid oxide fuel cells
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
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journal impact factor 9.931
5 year journal impact factor 9.531
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