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Oxyanion doping strategies to enhance the ionic conductivity in Ba2In2O5

Shin, J. Felix and Orera, A and Apperley, D.C. and Slater, P.R. (2011) Oxyanion doping strategies to enhance the ionic conductivity in Ba2In2O5. Journal of Materials Chemistry, 21 (3). pp. 874-879.

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URL of Published Version: http://pubs.rsc.org/en/content/articlelanding/2011/jm/c0jm01978j

Identification Number/DOI: 10.1039/C0JM01978J

In this paper we report the successful incorporation of phosphate and sulphate groups into the ionic conductor, Ba2In2O5, with the samples analysed through a combination of X-ray diffraction, NMR, TGA, Raman spectroscopy and conductivity measurements. The results show that such oxyanion incorporation leads to a conversion from an ordered brownmillerite-type structure to a disordered perovskite-type, and hence increases the conductivity at temperatures < 800○C. In wet atmospheres, there is evidence for a significant enhancement of the conductivity through a protonic contribution.

Type of Work:Article
Date:2011 (Publication)
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Chemistry
Keywords:solid oxide fuel cells; electrolyte; proton conductor; Ba2in2o5; phosphate; sulfate
Subjects:QD Chemistry
Institution:University of Birmingham
Copyright Holders:Royal Society of Chemistry
ID Code:1154
Refereed:YES
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