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dc.contributor.authorFop, Sacha
dc.contributor.authorMcCombie, Kirstie S.
dc.contributor.authorWildman, Eve J.
dc.contributor.authorSkakle, Jan M. S.
dc.contributor.authorIrvine, John T. S.
dc.contributor.authorConnor, Paul A.
dc.contributor.authorSavaniu, Cristian
dc.contributor.authorRitter, Clemens
dc.contributor.authorMclaughlin, Abbie C.
dc.identifier.citationFop , S , McCombie , K S , Wildman , E J , Skakle , J M S , Irvine , J T S , Connor , P A , Savaniu , C , Ritter , C & Mclaughlin , A C 2020 , ' High oxide ion and proton conductivity in a disordered hexagonal perovskite ' , Nature Materials , vol. 19 , no. 7 , pp. 752–757 .
dc.identifier.otherORCID: /0000-0002-8394-3359/work/70919726
dc.identifier.otherORCID: /0000-0002-1492-7590/work/70919890
dc.descriptionThis research was supported by the Leverhulme trust and EPSRC (MISE). We also acknowledge STFC-GB for provision of beamtime at the Institut Laue Langevin.en
dc.description.abstractOxide ion and proton conductors, which exhibit high conductivity at intermediate temperature, are necessary to improve the performance of ceramic fuel cells. The crystal structure plays a pivotal role in defining the ionic conduction properties, and the discovery of new materials is a challenging research focus. Here, we show that the undoped hexagonal perovskite Ba7Nb4MoO20 supports pure ionic conduction with high proton and oxide ion conductivity at 510 °C (the bulk conductivity is 4.0 mS cm−1), and hence is an exceptional candidate for application as a dual-ion solid electrolyte in a ceramic fuel cell that will combine the advantages of both oxide ion and proton-conducting electrolytes. Ba7Nb4MoO20 also showcases excellent chemical and electrical stability. Hexagonal perovskites form an important new family of materials for obtaining novel ionic conductors with potential applications in a range of energy-related technologies.
dc.relation.ispartofNature Materialsen
dc.subjectFuel cellsen
dc.subjectSolid-state chemistryen
dc.subjectQD Chemistryen
dc.titleHigh oxide ion and proton conductivity in a disordered hexagonal perovskiteen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.contributor.institutionUniversity of St Andrews. Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.contributor.institutionUniversity of St Andrews. St Andrews Sustainability Instituteen
dc.description.statusPeer revieweden

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