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Crystals 2017, 7(6), 169; doi:10.3390/cryst7060169

Investigation into the Effect of Sulfate and Borate Incorporation on the Structure and Properties of SrFeO3-δ

School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
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Academic Editor: Stevin Pramana
Received: 28 April 2017 / Revised: 26 May 2017 / Accepted: 3 June 2017 / Published: 7 June 2017
(This article belongs to the Special Issue Crystal Structure of Electroceramics)
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Abstract

In this paper, we demonstrate the successful incorporation of sulfate and borate into SrFeO3-δ, and characterise the effect on the structure and conductivity, with a view to possible utilisation as a cathode material in Solid Oxide Fuel Cells. The incorporation of low levels of sulfate/borate is sufficient to cause a change from a tetragonal to a cubic cell. Moreover, whereas heat treatment of undoped SrFeO3-δ under N2 leads to a transformation to brownmillerite Sr2Fe2O5 with oxygen vacancy ordering, the sulfate/borate-doped samples remain cubic under the same conditions. Thus, sulfate/borate doping appears to be successful in introducing oxide ion vacancy disorder in this system. View Full-Text
Keywords: solid oxide fuel cell; cathode; perovskite; sulfate; borate solid oxide fuel cell; cathode; perovskite; sulfate; borate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jarvis, A.; Slater, P.R. Investigation into the Effect of Sulfate and Borate Incorporation on the Structure and Properties of SrFeO3-δ. Crystals 2017, 7, 169.

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