title: Fast oxygen exchange kinetics of pore-free Bi(1-x)Sr(x)FeO(3-δ) thin films.
abstract: The oxygen incorporation/extraction kinetics of the potential solid oxide fuel cell (SOFC) cathode material Bi(1-x)Sr(x)FeO(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-x)Sr(x)FeO(3-δ) and-among cobalt-free perovskites-only surpassed by Ba(1-x)Sr(x)FeO(3-δ) which is however known to be unstable in a SOFC environment.
authors.affiliation: Max Planck Institute for Solid State Research, Stuttgart, Germany. a.wedig@fkf.mpg.de
authors.forename: Anja
authors.initials: A
authors.lastname: Wedig
authors.forename: Rotraut
authors.initials: R
authors.lastname: Merkle
authors.forename: Benjamin
authors.initials: B
authors.lastname: Stuhlhofer
authors.forename: Hanns-Ulrich
authors.initials: HU
authors.lastname: Habermeier
authors.forename: Joachim
authors.initials: J
authors.lastname: Maier
authors.forename: Eugene
authors.initials: E
authors.lastname: Heifets