Eu2SrCo1.5Fe0.5O7 a new promising Ruddlesden-Popper member as a cathode component for intermediate temperature solid oxide fuel cells
authors Boulahya, K; Munoz-Gil, D; Gomez-Herrero, A; Azcondo, MT; Amador, U
nationality International
journal JOURNAL OF MATERIALS CHEMISTRY A
keywords OXYGEN TRACER DIFFUSION; ELECTRICAL-CONDUCTIVITY; THERMAL-EXPANSION; ELECTROCHEMICAL CHARACTERIZATION; TRANSPORT-PROPERTIES; SEEBECK COEFFICIENT; CRYSTAL-STRUCTURE; AIR-ELECTRODES; PEROVSKITE; REDUCTION
abstract A new oxide of the Ruddlesden-Popper series in the (Eu,Sr)(n+1)(Co,Fe)(n)O3n+1 system has been isolated and structurally characterized. X-ray diffraction and electron microscopy show that polycrystalline Eu2SrCo1.5Fe0.5O7 constitutes the n = 2 member of a homologous series, the essential feature of which is the existence of two connected Co/Fe octahedral layers with a perovskite-like structure, linked by an EuO rock-salt like layer. Random distributions of 3d-metals in the perovskite blocks and interstitial and oxygen vacancies in the rock-salt layers (anti Frenkel defects) are observed by electron microscopy. Such facts are commonly associated with high electronic conduction and ionic conductivity. The electrochemical study shows that the area-specific resistance of this compound is 0.26 cm(2) at 700 degrees C in air, a value which is comparable to those of the best state-of-the-art Ruddlesden-Popper materials used as cathodes in intermediate temperature solid oxide fuel cells.
publisher ROYAL SOC CHEMISTRY
issn 2050-7488
isbn 2050-7496
year published 2019
volume 7
issue 10
beginning page 5601
ending page 5611
digital object identifier (doi) 10.1039/c8ta11254a
web of science category Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary
subject category Chemistry; Energy & Fuels; Materials Science
unique article identifier WOS:000463824300050
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journal analysis (jcr 2019):
journal impact factor 11.301
5 year journal impact factor 10.694
category normalized journal impact factor percentile 91.814
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