Eu2SrCo1.5Fe0.5O7 a new promising Ruddlesden– Popper member as a cathode component for intermediate temperature solid oxide fuel cells
Loading...
Official URL
Full text at PDC
Publication date
2019
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Royal Society of Chemistry
Citations
Exportar
Citation
Boulahya, Khalid, et al. «Eu 2 SrCo 1.5 Fe 0.5 O 7 a New Promising Ruddlesden–Popper Member as a Cathode Component for Intermediate Temperature Solid Oxide Fuel Cells». Journal of Materials Chemistry A, vol. 7, n.o 10, 2019, pp. 5601-11. https://doi.org/10.1039/C8TA11254A.
Abstract
A new oxide of the Ruddlesden–Popper series in the (Eu,Sr)n+1(Co,Fe)nO3n+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 U cm2 at 700 ºC 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.