Fast oxygen exchange kinetics of pore-free Bi1−xSrxFeO3−δ thin films

Anja Wedig; Rotraut Merkle; Benjamin Stuhlhofer; Hanns-Ulrich Habermeier; Joachim Maier; Eugene Heifets

doi:10.1039/C1CP21684H

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Fast oxygen exchange kinetics of pore-free Bi_1−xSr_xFeO_3−δ thin films†

Anja Wedig,*^a Rotraut Merkle,^a Benjamin Stuhlhofer,^a Hanns-Ulrich Habermeier,^a Joachim Maier^a and Eugene Heifets^a

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* Corresponding authors

^a Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany
E-mail: a.wedig@fkf.mpg.de, s.weiglein@fkf.mpg.de
Fax: +49 711 689 1722
Tel: +49 711 689 1771

Abstract

The oxygen incorporation/extraction kinetics of the potential solid oxide fuel cell (SOFC) cathode material Bi_1−xSr_xFeO_3−δ with x = 0.5 and 0.8 was studied by electrochemical impedance spectroscopy on geometrically well-defined pore-free thin film electrodes. The oxygen exchange rate was found to be higher than that of La_1−xSr_xFeO_3−δ and—among cobalt-free perovskites—only surpassed by Ba_1−xSr_xFeO_3−δ which is however known to be unstable in a SOFC environment.

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Article information

DOI: https://doi.org/10.1039/C1CP21684H
Article type: Communication
Submitted: 24 May 2011
Accepted: 08 Aug 2011
First published: 22 Aug 2011

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Phys. Chem. Chem. Phys., 2011,13, 16530-16533

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Fast oxygen exchange kinetics of pore-free Bi_1−xSr_xFeO_3−δ thin films

A. Wedig, R. Merkle, B. Stuhlhofer, H. Habermeier, J. Maier and E. Heifets, Phys. Chem. Chem. Phys., 2011, 13, 16530 DOI: 10.1039/C1CP21684H

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