Complex modulation of the crystal structure of a layered perovskite. A promising solid-oxide-fuelcell cathode
authors de Irujo-Labalde, XM; Munoz-Gil, D; Urones-Garrote, E; Avila-Brandea, D; Garcia-Martin, S
nationality International
journal JOURNAL OF MATERIALS CHEMISTRY A
keywords ELECTROCHEMICAL PROPERTIES; CELLS; PRBACO2O5+DELTA; DIFFUSION; MAGNETISM
abstract Layered-type perovskites have been the focus of research in the last few years due to their outstanding properties as solid oxide fuel cell oxygen electrodes. The synthesis of a new (GdBa)(0.8)Ca0.4Co0.6Fe1.4O6-delta layered perovskite as a single phase as well as the crystal structure determination and catalytic activity for oxygen reduction is reported. Highly advanced methods of transmission electron microscopy have been used for structure determination at atomic resolution. The oxide shows a complex modulation of the crystal structure associated with layered-type ordering of the Gd, Ba and Ca atoms in combination with formation of different coordination polyhedra of the Fe and Co atoms. Location of the anion vacancies within particular highly ion-conducting layers of the crystal structure has been achieved by phase image reconstruction. This material exhibits excellent electrochemical behaviour and thermal stability for use as an air electrode in IT-SOFCs.
publisher ROYAL SOC CHEMISTRY
issn 2050-7488
year published 2016
volume 4
issue 26
beginning page 10241
ending page 10247
digital object identifier (doi) 10.1039/c6ta03307e
web of science category Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary
subject category Chemistry; Energy & Fuels; Materials Science
unique article identifier WOS:000378742100024
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journal analysis (jcr 2017):
journal impact factor 9.931
5 year journal impact factor 9.531
category normalized journal impact factor percentile 92.768
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