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Nature Research, Nature Communications, 1(6), 2015

DOI: 10.1038/ncomms7924

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In-operando high-speed tomography of lithium-ion batteries during thermal runaway

Journal article published in 2015 by Donal P. Finegan ORCID, Mario Scheel, James B. Robinson ORCID, Bernhard Tjaden, Ian Hunt, Thomas J. Mason, Jason Millichamp, Marco Di Michiel, Gregory J. Offer, Gareth Hinds, Dan J. L. Brett, Others, Paul R. Shearing
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractPrevention and mitigation of thermal runaway presents one of the greatest challenges for the safe operation of lithium-ion batteries. Here, we demonstrate for the first time the application of high-speed synchrotron X-ray computed tomography and radiography, in conjunction with thermal imaging, to track the evolution of internal structural damage and thermal behaviour during initiation and propagation of thermal runaway in lithium-ion batteries. This diagnostic approach is applied to commercial lithium-ion batteries (LG 18650 NMC cells), yielding insights into key degradation modes including gas-induced delamination, electrode layer collapse and propagation of structural degradation. It is envisaged that the use of these techniques will lead to major improvements in the design of Li-ion batteries and their safety features.