Robinson, JB;
Maier, M;
Compton, T;
Alster, G;
Shearing, P;
Brett, D;
(2019)
Spatially Resolved Ultrasound Diagnostics of Li-Ion Battery Electrodes.
Physical Chemistry Chemical Physics
10.1039/C8CP07098A.
(In press).
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Abstract
The importance of reliable battery diagnostic systems has grown substantially in recent years as a result of the use of high power Li-ion battery packs in an increasingly diverse range of applications. Here, spatially resolved ultrasound acoustic measurements are used to analyse the condition of Li-ion electrodes. Ultrasonic measurements are performed on a commercial mobile phone battery over the full operating voltage window with the lithiation and delithiation of electrodes observed at 36 locations on the surface of the cell. X-ray computed tomography was performed on the cell to ascertain the internal architecture and features that enabled the architecture of the battery to be correlated with the acoustic signature. Analyses of the acoustic signals obtained suggest that the anode and cathode layers can be identified by examining the change in attenuation associated with the charging process. It is also seen that expansions of the electrode layers are inhibited by the presence of the anode current collecting tab in the battery which leads to spatial inhomogeneities in the expansion of the electrode layer examined within the cell.
| Type: | Article |
|---|---|
| Title: | Spatially Resolved Ultrasound Diagnostics of Li-Ion Battery Electrodes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/C8CP07098A |
| Publisher version: | http://doi.org/10.1039/C8CP07098A |
| Language: | English |
| Additional information: | Copyright: This journal is © the Owner Societies 2018. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
| 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 |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10064929 |
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