Liquid-like ionic diffusion in solid bismuth oxide revealed by coherent quasielastic neutron scattering

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dc.contributor.authorWind, Jen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorYu, Den_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2024-10-04T03:52:02Zen_AU
dc.date.available2024-10-04T03:52:02Zen_AU
dc.date.issued2017-08-07en_AU
dc.date.statistics2024-10-01en_AU
dc.description.abstractThe exceptional oxide ionic conductivity of the high-temperature phase of bismuth oxide gives rise to a characteristic "quasielastic" broadening of its neutron scattering spectrum. We show that the oscillating form of this broadening can be fit using a modified version of a jump-diffusion model previously reserved for liquid ionic conductors. Fit parameters include a quantitative jump distance and a semiquantitative diffusion coefficient. In the case presented here, the results show that diffusion is isotropic (liquid-like) even though some directions present shorter oxygen-vacancy distances, an insight corroborated by computational dynamics simulations. More broadly, the results show for the first time that quasielastic neutron scattering can be directly analyzed to yield quantitative insights into the atomic-scale mechanisms of solid-state ionic conduction, even when the diffusing species is a coherent neutron scatterer such as oxygen. This shows its power as a tool for studying functional solid-state materials, notably for solid-oxide fuel cells and, potentially, lithium-ion batteries. © 2017 American Chemical Society.en_AU
dc.description.sponsorshipThe authors thank Prof. Gordon Kearley for useful discussions. This work was supported by the Australian Research Council (Grant DP150102863) and the Australian Institute for Nuclear Science and Engineering (Postgraduate Research Award to J.W.).en_AU
dc.identifier.citationWind, J., Mole, R. A., Yu, D., & Ling, C. D. (2017). Liquid-like ionic diffusion in solid bismuth oxide revealed by coherent quasielastic neutron scattering. Chemistry of Materials, 29(17), 7408-7415. doi:10.1021/acs.chemmater.7b02374en_AU
dc.identifier.issn0897-4756en_AU
dc.identifier.issn1520-5002en_AU
dc.identifier.issue17en_AU
dc.identifier.journaltitleChemistry of Materialsen_AU
dc.identifier.pagination7408-7415en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.chemmater.7b02374en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15735en_AU
dc.identifier.volume29en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Society (ACS)en_AU
dc.subjectBismuth oxidesen_AU
dc.subjectNeutronsen_AU
dc.subjectDiffusionen_AU
dc.subjectSolidsen_AU
dc.subjectLiquidsen_AU
dc.subjectIonic conductivityen_AU
dc.subjectTemperature rangeen_AU
dc.subjectOxidesen_AU
dc.subjectOxygenen_AU
dc.subjectSolid oxide fuel cellsen_AU
dc.subjectLithium ion batteriesen_AU
dc.titleLiquid-like ionic diffusion in solid bismuth oxide revealed by coherent quasielastic neutron scatteringen_AU
dc.typeJournal Articleen_AU
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