Microstructural and electrochemical characterizations of an electrolyte with an apatite structure, La9Sr1Si6O26.5

The electrochemical properties of dense La9Sr1Si6O26.5 pellets were studied. High conductivity values were measured (8.8X10-3S cm-1 at 700 deg C) for this pure ionic conductor. Semipermeability measurements allowed measuring an electronic transport number of 5X10-5 at 700 deg C under air. These resu...

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Published inSolid state ionics Vol. 178; no. 23-24; pp. 1337 - 1343
Main Authors BRISSE, A, SAUVET, A, BARTHET, C, GEORGES, S, FOULETIER, J
Format Journal Article
LanguageEnglish
Published Elsevier 01.08.2007
Subjects
Chemical Sciences
Material chemistry
Apatite
Impedance spectroscopy
Electrolyte
Ionic conductivity
SOFC
Oxygen permeation
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Summary:The electrochemical properties of dense La9Sr1Si6O26.5 pellets were studied. High conductivity values were measured (8.8X10-3S cm-1 at 700 deg C) for this pure ionic conductor. Semipermeability measurements allowed measuring an electronic transport number of 5X10-5 at 700 deg C under air. These results prove that La9Sr1Si6O26.5 is a pure ionic conductor. Ageing tests of this compound during one month showed a stable behaviour of the conductivity under air and a slight decrease of it under humidified atmosphere.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2007.07.009