Please use this identifier to cite or link to this item: https://doi.org/10.1007/s10008-011-1572-8
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dc.titleVariation in structure and Li +-ion migration in argyrodite-type Li 6PS 5X (X = Cl, Br, I) solid electrolytes
dc.contributor.authorRayavarapu, P.R.
dc.contributor.authorSharma, N.
dc.contributor.authorPeterson, V.K.
dc.contributor.authorAdams, S.
dc.date.accessioned2014-10-07T09:57:01Z
dc.date.available2014-10-07T09:57:01Z
dc.date.issued2012-05
dc.identifier.citationRayavarapu, P.R., Sharma, N., Peterson, V.K., Adams, S. (2012-05). Variation in structure and Li +-ion migration in argyrodite-type Li 6PS 5X (X = Cl, Br, I) solid electrolytes. Journal of Solid State Electrochemistry 16 (5) : 1807-1813. ScholarBank@NUS Repository. https://doi.org/10.1007/s10008-011-1572-8
dc.identifier.issn14328488
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/86974
dc.description.abstractAll-solid-state rechargeable lithium-ion batteries (AS-LIBs) are attractive power sources for electrochemical applications due to their potentiality in improving safety and stability over conventional batteries with liquid electrolytes. Finding a solid electrolyte with high ionic conductivity and compatibility with other battery components is a key factor in raising the performance of AS-LIBs. In this work, we prepare argyrodite-type Li 6PS 5X (X = Cl, Br, I) using mechanical milling followed by annealing. X-ray diffraction characterization reveals the formation and growth of crystalline Li 6PS 5X in all cases. Ionic conductivity of the order of 7×10 -4 S cm -1 in Li 6PS 5Cl and Li 6PS 5Br renders these phases suitable for AS-LIBs. Joint structure refinements using high-resolution neutron and laboratory X-ray diffraction provide insight into the influence of disorder on the fast ionic conductivity. Besides the disorder in the lithium distribution, it is the disorder in the S 2-/Cl - or S 2-/ Br - distribution that we find to promote ion mobility, whereas the large I- cannot be exchanged for S 2- and the resulting more ordered Li 6PS 5I exhibits only a moderate conductivity. Li + ion migration pathways in the crystalline compounds are modelled using the bond valence approach to interpret the differences between argyrodites containing different halide ions.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1007/s10008-011-1572-8
dc.sourceScopus
dc.subjectBond valence
dc.subjectIon transport
dc.subjectLithium ion conduction
dc.subjectNeutron diffraction
dc.typeConference Paper
dc.contributor.departmentMATERIALS SCIENCE AND ENGINEERING
dc.description.doi10.1007/s10008-011-1572-8
dc.description.sourcetitleJournal of Solid State Electrochemistry
dc.description.volume16
dc.description.issue5
dc.description.page1807-1813
dc.identifier.isiut000303451100010
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