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

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Show simple item record Doherty, Jessica McNulty, David Biswas, Subhajit Moore, Kalani Conroy, Michele A. Bangert, Ursel O'Dwyer, Colm Holmes, Justin D. 2020-03-06T14:33:35Z 2020
dc.description peer-reviewed en_US
dc.description.abstract The 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 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 catalyzed 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 (DCPs). 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 ∼921mAhg−1 after 100 cycles. Voltage profiles and DCPs 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_US
dc.language.iso eng en_US
dc.publisher IOP Publishing en_US
dc.relation 141A2513 en_US
dc.relation.ispartofseries Nanotechnology;31 (16)
dc.rights © IOP Publishing en_US
dc.subject nanowire en_US
dc.subject GeSn allow en_US
dc.subject Li-ion battery en_US
dc.title Germanium tin alloy nanowires as anode materials for high performance Li-Ion batteries en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1088/1361-6528/ab6678
dc.contributor.sponsor SFI en_US
dc.relation.projectid 14/IA/2513 en_US 2021-01-28
dc.embargo.terms 2021-01-28 en_US
dc.internal.rssid 2951374

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