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dc.contributor.authorClark, Steve J.
dc.contributor.authorWang, Da
dc.contributor.authorArmstrong, A. Robert
dc.contributor.authorBruce, Peter G.
dc.date.accessioned2016-04-11T10:30:05Z
dc.date.available2016-04-11T10:30:05Z
dc.date.issued2016-03-21
dc.identifier.citationClark , S J , Wang , D , Armstrong , A R & Bruce , P G 2016 , ' Li(V 0.5 Ti 0.5 )S 2 as a 1V lithium intercalation electrode ' , Nature Communications , vol. 7 , 10898 , pp. 1-7 . https://doi.org/10.1038/ncomms10898en
dc.identifier.issn2041-1723
dc.identifier.otherPURE: 241881287
dc.identifier.otherPURE UUID: f028d559-fbff-406e-be9e-d5ce4e44177e
dc.identifier.otherBibtex: urn:dbd56f15444476d6b9759975ae2fff5b
dc.identifier.otherScopus: 84961830100
dc.identifier.otherORCID: /0000-0003-1937-0936/work/28123628
dc.identifier.otherWOS: 000372461800001
dc.identifier.urihttps://hdl.handle.net/10023/8592
dc.descriptionP.G.B. is indebted to the EPSRC including the SUPERGEN program for financial support.en
dc.description.abstractGraphite, the dominant anode in rechargeable lithium batteries, operates at ~0.1V versus Li+/Li and can result in lithium plating on the graphite surface, raising safety concerns. Titanates, for example, Li4Ti5O12, intercalate lithium at ~1.6 V versus Li+/Li, avoiding problematic lithium plating at the expense of reduced cell voltage. There is interest in 1V anodes, as this voltage is sufficiently high to avoid lithium plating while not significantly reducing cell potential. The sulfides, LiVS2 and LiTiS2, have been investigated as possible 1V intercalation electrodes but suffer from capacity fading, large 1st cycle irreversible capacity or polarization. Here we report that the 50/50 solid solution, Li1+x(V0.5Ti0.5)S2, delivers a reversible capacity to store charge of 220 mAhg-1 (at 0.9 V), 99% of theoretical, at a rate of C/2, retaining 205 mAhg-1 at C-rate (92% of theoretical). Rate capability is excellent with 200 mAhg-1 at 3C. C-rate is discharge in 1 h. Polarization is low, 100mV at C/2. To the best of our knowledge, the properties/performances of Li(V0.5Ti0.5)S2 exceed all previous 1V electrodes.
dc.format.extent7
dc.language.isoeng
dc.relation.ispartofNature Communicationsen
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material.en
dc.subjectQD Chemistryen
dc.subjectNDASen
dc.subjectBDCen
dc.subjectR2Cen
dc.subject.lccQDen
dc.titleLi(V0.5Ti0.5)S2 as a 1V lithium intercalation electrodeen
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.identifier.doihttps://doi.org/10.1038/ncomms10898
dc.description.statusPeer revieweden
dc.identifier.grantnumberEP/I029273/1en


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