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Influence of the synthesis conditions on the crystal structure and properties of GdBaCo2-xFexO5+δ oxides as air-electrodes for Intermediate Temperature Solid Oxide Fuel Cells

Abstract

The influence of the synthesis conditions on the crystal structure and properties of the oxides of the system GdBaCo2-xFexO5+δ is reported in this article. The materials are prepared by ceramic method either in air or argon atmosphere. Crystal structure characterization is carried out by combination of powder X-ray diffraction (PXRD) with advanced methods of high resolution transmission electron microscopy (HRTEM), scannnig-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).

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Publication details

The article was received on 27 Mar 2017, accepted on 17 May 2017 and first published on 17 May 2017


Article type: Paper
DOI: 10.1039/C7TA02671D
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Influence of the synthesis conditions on the crystal structure and properties of GdBaCo2-xFexO5+δ oxides as air-electrodes for Intermediate Temperature Solid Oxide Fuel Cells

    D. Muñoz-Gil, D. Pérez-Coll, E. Urones-Garrote, U. Amador and S. García-Martín, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA02671D

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