dc.contributor.authorWei, Fengxia
dc.contributor.authorGasparyan, Hripsime
dc.contributor.authorKeenan, Philip J.
dc.contributor.authorGutmann, Matthias
dc.contributor.authorFang, Yanan
dc.contributor.authorBaikie, Tom
dc.contributor.authorClaridge, John B.
dc.contributor.authorSlater, Peter R.
dc.contributor.authorKloc, Christian Leo
dc.contributor.authorWhite, Timothy John
dc.identifier.citationWei, F., Gasparyan, H., Keenan, P. J., Gutmann, M., Fang, Y., Baikie, T., et al. (2015). Anisotropic oxide ion conduction in melilite intermediate temperature electrolytes. Journal of Materials Chemistry A, 3(6), 3091-3096.en_US
dc.description.abstractElectrolytes with oxide ion conductivities higher than 10−2 S cm−1 at moderate temperatures (∼500–900 °C) offer the possibility for solid oxide fuel cells to operate with less maintenance. This study of [A1+xB1−x]2[Ga]2[Ga2O7+x/2]2 (0 ≤ x ≤ 0.5) (A = La, Nd; B = Ca, Sr) layered-melilite found that in large single crystals intralayer oxide ion conduction is dominant. This anisotropic behavior arises by relaxation about the interstitial oxygen through changes in the interlayer A and Ga coordination, and at 850 °C conductivities are ∼0.008 S cm−1 along the c direction and ∼0.036 S cm−1 perpendicular to the c axis. It is found that the ionic conductivity can be optimized by increasing the number of interstitial oxygen and reducing the size of interlayer cations.en_US
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent16 p.en_US
dc.relation.ispartofseriesJournal of Materials Chemistry Aen_US
dc.rights© 2015 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Materials Chemistry A, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1039/C4TA05132G].en_US
dc.subjectAnisotropic oxide ion conductionen_US
dc.subjectStructure-property relation
dc.titleAnisotropic oxide ion conduction in melilite intermediate temperature electrolytesen_US
dc.typeJournal Article
dc.contributor.researchEnergy Research Institute @NTU
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.description.versionAccepted versionen_US

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