High capacity binder-free nanocrystalline GeO2 inverse opal anodes for Li-ion batteries with long cycle life and stable cell voltage

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dc.contributor.author McNulty, David
dc.contributor.author Geaney, Hugh
dc.contributor.author Buckley, Darragh
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-02-19T14:27:58Z
dc.date.available 2018-02-19T14:27:58Z
dc.date.issued 2018-11-07
dc.identifier.citation McNulty, D., Geaney, H., Buckley, D. and O'Dwyer, C. (2018) 'High capacity binder-free nanocrystalline GeO2 inverse opal anodes for Li-ion batteries with long cycle life and stable cell voltage', Nano Energy, 43, pp. 11-21. doi: 10.1016/j.nanoen.2017.11.007 en
dc.identifier.volume 43 en
dc.identifier.startpage 11 en
dc.identifier.endpage 21 en
dc.identifier.issn 2211-2855
dc.identifier.uri http://hdl.handle.net/10468/5478
dc.identifier.doi 10.1016/j.nanoen.2017.11.007
dc.description.abstract We demonstrate that crystalline macroporous GeO2 inverse opals exhibit state-of-the-art capacity retention, voltage stability and a very long cycle life when tested as anode materials for Li-ion batteries. The specific capacities and capacity retention obtained from GeO2 IOs are greater than values reported for other GeO2 nanostructures and comparable to pure Ge nanostructures. Unlike pure Ge nanostructures, GeO2 IOs can be prepared in air without complex processing procedures, potentially making them far more attractive from an industrial point of view, in terms of cost and ease of production. Inverse opals are structurally and electrically interconnected, and remove the need for additives and binders. GeO2 IOs show gradual capacity fading over 250 and 1000 cycles, when cycled at specific currents of 150 and 300 mA/g, respectively, while maintaining high capacities and a stable overall cell voltage. The specific capacities after the 500th and 1000th cycles at a specific current of 300 mA/g were ~ 632 and 521 mA h/g respectively, corresponding to a capacity retention in each case of ~ 76% and 63% from the 2nd cycle. Systematic analysis of differential capacity plots obtained from galvanostatic voltage profiles over 1000 cycles offers a detailed insight into the mechanism of charge storage in GeO2 anodes over their long cycle life. Rate capability testing and asymmetric galvanostatic testing demonstrate the ability of GeO2 IO samples to deliver significantly high capacities even at high specific currents (1 A/g). en
dc.description.sponsorship Royal Irish Academy (Charlemont Grant); Irish Research Council (Government of Ireland Postgraduate Award under contract GOIPG/2014/206) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.uri http://www.sciencedirect.com/science/article/pii/S2211285517306870
dc.rights © 2017 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license. en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject GeO2 en
dc.subject Inverse opal en
dc.subject Li-ion en
dc.subject Semiconductor en
dc.subject Nanomaterials en
dc.title High capacity binder-free nanocrystalline GeO2 inverse opal anodes for Li-ion batteries with long cycle life and stable cell voltage en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: c.odwyer@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 24 months after publication by request of the publisher. en
dc.check.date 2019-11-07
dc.date.updated 2018-02-19T08:38:04Z
dc.description.version Accepted Version en
dc.internal.rssid 421242623
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Royal Irish Academy en
dc.contributor.funder Irish Research Council en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Nano Energy en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress c.odwyer@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/13/TIDA/E2761/IE/LiONSKIN - Moldable Li-ion battery outer skin for electronic devices/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/15/TIDA/2893/IE/Advanced Battery Materials for High Volumetric Energy Density Li-ion Batteries for Remote Off-Grid Power/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2581/IE/Diffractive optics and photonic probes for efficient mouldable 3D printed battery skin materials for portable electronic devices/ en


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© 2017 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license. Except where otherwise noted, this item's license is described as © 2017 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.
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