Finegan, DP;
Darcy, E;
Keyser, M;
Tjaden, B;
Heenan, TMM;
Jervis, R;
Bailey, JJ;
... Shearing, PR; + view all
(2018)
Identifying the Cause of Rupture of Li‐Ion Batteries during Thermal Runaway.
Advanced Science
, 5
(1)
, Article 1700369. 10.1002/advs.201700369.
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Abstract
As the energy density of lithium‐ion cells and batteries increases, controlling the outcomes of thermal runaway becomes more challenging. If the high rate of gas generation during thermal runaway is not adequately vented, commercial cell designs can rupture and explode, presenting serious safety concerns. Here, ultra‐high‐speed synchrotron X‐ray imaging is used at >20 000 frames per second to characterize the venting processes of six different 18650 cell designs undergoing thermal runaway. For the first time, the mechanisms that lead to the most catastrophic type of cell failure, rupture, and explosion are identified and elucidated in detail. The practical application of the technique is highlighted by evaluating a novel 18650 cell design with a second vent at the base, which is shown to avoid the critical stages that lead to rupture. The insights yielded in this study shed new light on battery failure and are expected to guide the development of safer commercial cell designs.
| Type: | Article |
|---|---|
| Title: | Identifying the Cause of Rupture of Li‐Ion Batteries during Thermal Runaway |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/advs.201700369 |
| Publisher version: | https://doi.org/10.1002/advs.201700369 |
| Language: | English |
| Additional information: | © 2017 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License 4.0 (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | high‐speed imaging, Li‐ion batteries, thermal runaway, venting, X‐ray CT |
| 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 Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10041857 |
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