Formation and conductivity studies of lithium argyrodite solid electrolytes using in-situ neutron diffraction

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dc.contributor.authorRao, RPen_AU
dc.contributor.authorSharma, Nen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorAdams, Sen_AU
dc.date.accessioned2015-10-20T00:33:19Zen_AU
dc.date.available2015-10-20T00:33:19Zen_AU
dc.date.issued2013-01-10en_AU
dc.date.statistics2015-10-19en_AU
dc.description.abstractLithium-ion conducting argyrodites Li6PS5X (X = Cl, Br, I) are a promising class of fast-ion conductors for all-solid state Li-ion batteries. To gain a deeper insight into the phase formation of Li6PS5Cl, in situ neutron diffraction studies are carried out on a stoichiometric ball-milled precursor mixture during thermal treatment. The evolution of the S2 −/Cl− anion disorder and its correlation with ionic conductivity are reported here. In contrast to earlier reports, an argyrodite phase is found to form between 80 and 150 °C, but the phase shows only moderate conductivity when crystallized at such low temperatures and further thermal treatment is required to access the highly conducting phase. The maximum room-temperature ionic conductivity of 1.1 × 10− 3 S/cm is observed for samples annealed at intermediate temperatures (250 °C). When ball-milled glass-ceramic precursors for Li6PS5Cl are crystallized with a constant slow heating rate, the initially formed argyrodite phase is found to be Li7PS6, which is then gradually converted into Li6PS5Cl at higher temperatures. The industrial requirements for minimizing cost by using lower annealing temperatures thus need to be balanced with the requirements of obtaining the highest conducting composition of the phase for performance in all-solid state batteries. © 2012, Elsevier B.V.en_AU
dc.identifier.citationRao, R. P., Sharma, N., Peterson, V. K., & Adams, S. (2013). Formation and conductivity studies of lithium argyrodite solid electrolytes using in-situ neutron diffraction. Solid State Ionics, 230, 72-76. doi:10.1016/j.ssi.2012.09.014en_AU
dc.identifier.govdoc6193en_AU
dc.identifier.issn0167-2738en_AU
dc.identifier.journaltitleSolid State Ionicsen_AU
dc.identifier.pagination72-76en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.ssi.2012.09.014en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6345en_AU
dc.identifier.volume230en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectLithiumen_AU
dc.subjectIonsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectAnionsen_AU
dc.subjectMicrostructureen_AU
dc.subjectThermal conductivityen_AU
dc.titleFormation and conductivity studies of lithium argyrodite solid electrolytes using in-situ neutron diffractionen_AU
dc.typeJournal Articleen_AU
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