Journal
SOLID STATE IONICS
Volume 253, Issue -, Pages 211-216Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2013.09.056
Keywords
Bi-Sr-Fe-based perovskite-type oxide; Mixed ionic and electronic conductor; SOFC cathode; Oxygen permeable membrane; Mn-doping effect
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Funding
- Next Generation World-Leading Researchers (NEXT Program) by the Japan Society for the Promotion of Science [GR011]
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The Fe-site of Bi0.7Sr0.3FeO3-delta (BSF) was doped with manganese to determine any changes in the charged defects and understand how this change affects the electrode properties of this material. The electrical conductivity and oxygen permeability results suggest that Mn-doping effectively improves the electronic compensation of BSF, which is energetically favored by ionic compensation. In terms of electrode properties, 50 mol% Mn-doped BSF (BSFM55) showed more than one order of magnitude greater electrode resistance than BSF, suggesting that kinetics related to ionic defects plays a more important role than electronic defects in determining the properties of Bi-Sr-Fe based perovskite oxides. (C) 2013 Elsevier B.V. All rights reserved.
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