Cooper, SJ;
Eastwood, DS;
Gelb, J;
Damblanc, G;
Brett, DJL;
Bradley, RS;
Withers, PJ;
... Shearing, PR; + view all
(2014)
Image based modelling of microstructural heterogeneity in LiFePO4 electrodes for Li-ion batteries.
Journal of Power Sources
, 247
pp. 1033-1039.
10.1016/j.jpowsour.2013.04.156.
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Abstract
Battery and fuel cell simulations commonly assume that electrodes are macro-homogeneous and isotropic. These simulations have been used to successfully model performance, but give little insight into predicting failure. In Li-ion battery electrodes, it is understood that local tortuosity impacts charging rates, which may cause increased degradation. This report describes a novel approach to quantifying tortuosity based on a heat transfer analogy applied to X-ray microscopy data of a commercially available LiFePO4 electrode. This combination of X-ray imaging and image-based simulation reveals the microscopic performance of the electrode; notably, the tortuosity was observed to vary significantly depending on the direction considered, which suggests that tortuosity might best be quantified using vectors rather than scalars.
| Type: | Article |
|---|---|
| Title: | Image based modelling of microstructural heterogeneity in LiFePO4 electrodes for Li-ion batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jpowsour.2013.04.156 |
| Publisher version: | http://dx.doi.org/10.1016/j.jpowsour.2013.04.156 |
| Language: | English |
| Additional information: | © 2013 Elsevier B.V. except certain content provided by third parties. ScienceDirect® is a registered trademark of Elsevier B.V. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY-NC-ND), which permits distribution. You may not use this work for commercial purposes or alter, transform, or build upon this work. The original author and source must be credited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1400119 |
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