Jnawali, Anmol;
Kok, Matt DR;
Krishna, Muthu;
Varnosfaderani, Mina Abedi;
Brett, Daniel JL;
Shearing, Paul R;
(2023)
Evaluating Long-Term Cycling Degradation in Cylindrical Li-Ion Batteries Using X-ray Tomography and Virtual Unrolling.
Journal of The Electrochemical Society
, 170
(9)
, Article 090540. 10.1149/1945-7111/acf883.
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Abstract
Lithium-ion (Li-ion) batteries have undergone a multitude of improvements and achieved a high level of technological maturity. To further optimise cell performance, an understanding of the failure mechanisms is important. Forty-eight state-of-the-art cylindrical cells in the 21700 format, suitable for electric vehicles, are studied at the beginning-of-life (BOL) and end-of-life (EOL) by X-ray computed tomography (X-ray CT) and image analysis. The results indicate that shifting current collecting tabs closer to the centre of the cell and including a mandrel is likely to supress the propagation of capacity depleting deformations. It is recommended that manufacturers also try to improve cell assembly processes to form a more uniformly circular jelly roll and use tapered electrodes to minimise the nucleation of deformations.
| Type: | Article |
|---|---|
| Title: | Evaluating Long-Term Cycling Degradation in Cylindrical Li-Ion Batteries Using X-ray Tomography and Virtual Unrolling |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1149/1945-7111/acf883 |
| Publisher version: | https://doi.org/10.1149/1945-7111/acf883 |
| Language: | English |
| Additional information: | This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. |
| Keywords: | Science & Technology, Physical Sciences, Technology, Electrochemistry, Materials Science, Coatings & Films, Materials Science, END-OF-LIFE, CELLS, CAPACITY, ELECTRODES |
| 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-pp.ucl.ac.uk/id/eprint/10183693 |
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