The effect of TiO2 and GeO2 composite mixing on the behavior of macroporous Li-Ion battery anode materials

cb
Thumbnail Image
Files
Date
2023-12-19
Authors
Carroll, Aoife
Grant, Alex
Zhang, Yan
Gulzar, Umair
Douglas-Henry, Danielle
Nicolosi, Valeria
O'Dwyer, Colm
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing
Published Version
https://doi.org/10.1149/1945-7111/ad1371
Research Projects
Organizational Units
Journal Issue
Abstract
Highly ordered, macroporous inverse opal structures can be made as TiO2/GeO2 nanocomposites with various GeO2 content and provide Coulombic and voltage stable response where the Ge content and its distribution influence the overall capacity at both slow and fast rates. These interconnected binder-free anodes were characterized using X-ray diffraction, high resolution transmission electron microscopy, selected area electron diffraction, energy dispersive X-ray spectroscopy and electron energy loss spectroscopy. The electrochemical response in half cells over 2000 cycles and various rates showed how the mixture affected key metrics for the material in battery cells. The data shows that a composite of intercalation and alloying compounds can provide good capacity (between theoretical maxima for either material alone) and excellent coulombic efficiency (>99%), even with low quantities of the higher capacity alloying compound. Compositional gradients or spatial heterogeneities in the distribution of one material in the composite are shown to affect capacity during cycling life, where a coulombically efficient increasing capacity is found as the higher capacity material becomes electrochemically active within the composite matrix as the material is modified during cycling.
Description
Keywords
TiO2 and GeO2 composite mixing , Macroporous Li-Ion battery anode materials
Citation
Carroll, A., Grant, A., Zhang, Y., Gulzar, U., Douglas-Henry, D., Nicolosi, V. and O’Dwyer, C. (2023) 'The effect of TiO2 and GeO2 composite mixing on the behavior of macroporous Li-Ion battery anode materials', Journal of the Electrochemical Society, 170(12), 120521(14pp). https://doi.org/10.1149/1945-7111/ad1371
Link to publisher’s version
URI
https://hdl.handle.net/10468/15828
Collections
Chemistry - Journal Articles
Environmental Research Institute - Journal Articles
Tyndall National Institute - Journal Articles
Copyright
© 2023, the Authors. Published on behalf of The Electrochemical Society by IOP Publishing Limited. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/ by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.