Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries

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dc.contributor.authorDoherty, Jessica
dc.contributor.authorMcNulty, David
dc.contributor.authorBiswas, Subhajit
dc.contributor.authorMoore, Kalani
dc.contributor.authorConroy, Michele
dc.contributor.authorBangert, Ursel
dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorHolmes, Justin D.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderIrish Research Councilen
dc.date.accessioned2020-01-10T10:01:13Z
dc.date.available2020-01-10T10:01:13Z
dc.date.issued2019-12-31
dc.date.updated2020-01-07T12:56:37Z
dc.description.abstractThe combination of two active Li-ion materials (Ge and Sn) can result in improved conduction paths and higher capacity retention. Here we report; for the first time; the implementation of Ge1-xSnx alloy nanowires as anode materials for Li-ion batteries. Ge1-xSnx alloy nanowires have been successfully grown via vapor-liquid-solid (VLS) technique directly on stainless steel current collectors. Ge1-xSnx (x = 0.048) nanowires were predominantly seeded from the Au0.80Ag0.20 catalysts with negligible amount of growth was also directly catalysed from stainless steel substrate. The electrochemical performance of the the Ge1-xSnx nanowires as an anode material for Li-ion batteries was investigated via galvanostatic cycling and detailed analysis of differential capacity plots. The nanowire electrodes demonstrated an exceptional capacity retention of 93.4 % from the 2nd to the 100th charge at a C/5 rate, while maintaining a specific capacity value of ~921 mAh/g after 100 cycles. Voltage profiles and differential capacity plots revealed that the Ge1-xSnx nanowires behave as an alloying mode anode material, as reduction/oxidation peaks for both Ge and Sn were observed, however it is clear that the reversible lithiation of Ge is responsible for the majority of the charge stored.en
dc.description.sponsorshipIrish Research Council (Postgraduate Scholarship Grant Number: GOIPG/2015/2772)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationDoherty, J., McNulty, D., Biswas, S., Moore, K., Conroy, M., Bangert, U., O’Dwyer, C. and Holmes, J. D. (2020) 'Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries', Nanotechnology, 31(16), 165402 (9 pp). doi: 10.1088/1361-6528/ab6678en
dc.identifier.doi10.1088/1361-6528/ab6678en
dc.identifier.eissn1361-6528
dc.identifier.issn0957-4484
dc.identifier.journaltitleNanotechnologyen
dc.identifier.urihttps://hdl.handle.net/10468/9479
dc.language.isoenen
dc.publisherIOP Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2513/IE/Silicon Compatible, Direct Band-Gap Nanowire Materials For Beyond-CMOS Devices/en
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1361-6528/ab6678
dc.rights© 2020 IOP Publishing Ltd. This Accepted Manuscript is available for reuse under a CC BY-NC-ND 3.0 licence after a 12 month embargo period. After the embargo period, everyone is permitted to use, copy and redistribute this article for non-commercial purposes only, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by-nc-nd/3.0en
dc.subjectNanowireen
dc.subjectGeSn alloyen
dc.subjectLi-ion batteryen
dc.titleGermanium tin alloy nanowires as anode materials for high performance Li-ion batteriesen
dc.typeArticle (peer-reviewed)en
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