Immobilization of Na ions for substantial power factor enhancement: site-specific defect engineering in Na0.8CoO2

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dc.contributor.authorTsai, PHen_AU
dc.contributor.authorAssadi, MHNen_AU
dc.contributor.authorZhang, Ten_AU
dc.contributor.authorUlrich, Cen_AU
dc.contributor.authorTan, TTen_AU
dc.contributor.authorDonelson, Ren_AU
dc.contributor.authorLi, Sen_AU
dc.date.accessioned2014-03-24T00:10:44Zen_AU
dc.date.available2014-03-24T00:10:44Zen_AU
dc.date.issued2012-02-16en_AU
dc.date.statistics2014-03-24en_AU
dc.description.abstractSimultaneous enhancement of the interdependent Seebeck coefficient and electrical conductivity has been achieved through defect engineering by doping Mg into specific sites of Na0.8CoO2. Results from thermoelectric measurement demonstrate that the power factor was substantially increased by 50% at ambient. Experimental and theoretical analyses show that the occupation of divalent Mg in the disordered Na layer immobilizes the Na ions and thus induces a long-range ordering of Na ions. This phenomenon improves the carrier mobility significantly, giving rise to the observed exotic thermoelectric performance. Moreover, it is predicted that other electronically closed-shell dopants in sodium cobaltate play a similar role in enhancing the thermoelectric conversion efficiency. © 2012, American Chemical Society.en_AU
dc.identifier.citationTsai, P. H., Assadi, M. H. N., Zhang, T., Ulrich, C., Tan, T. T., Donelson, R., & Li, S. (2012). Immobilization of Na ions for substantial power factor enhancement: site-specific defect engineering in Na0.8CoO2. Journal of Physical Chemistry C, 116(6), 4324-4329. doi:10.1021/jp209343ven_AU
dc.identifier.govdoc4543en_AU
dc.identifier.issn1932-7447en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitleJournal of Physical Chemistry Cen_AU
dc.identifier.pagination4324-4329en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/jp209343ven_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5278en_AU
dc.identifier.volume116en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectMoleculesen_AU
dc.subjectConversionen_AU
dc.subjectThermoelectric conversionen_AU
dc.subjectMagnetismen_AU
dc.subjectSodiumen_AU
dc.subjectMagnesium ionsen_AU
dc.titleImmobilization of Na ions for substantial power factor enhancement: site-specific defect engineering in Na0.8CoO2en_AU
dc.typeJournal Articleen_AU
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