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

Donal P. Finegan, Mario Scheel, James B. Robinson, Bernhard Tjaden, Ian Hunt, Thomas J. Mason, Jason Millichamp, Marco Di Michiel, Gregory J. Offer, Gareth Hinds, Dan J.L. Brett and Paul R. Shearing ()
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Donal P. Finegan: Electrochemical Innovation Lab, University College London, Torrington Place
Mario Scheel: ESRF, The European Synchrotron
James B. Robinson: Electrochemical Innovation Lab, University College London, Torrington Place
Bernhard Tjaden: Electrochemical Innovation Lab, University College London, Torrington Place
Ian Hunt: Imperial College London, South Kensington Campus
Thomas J. Mason: Electrochemical Innovation Lab, University College London, Torrington Place
Jason Millichamp: Electrochemical Innovation Lab, University College London, Torrington Place
Marco Di Michiel: ESRF, The European Synchrotron
Gregory J. Offer: Imperial College London, South Kensington Campus
Gareth Hinds: National Physical Laboratory
Dan J.L. Brett: Electrochemical Innovation Lab, University College London, Torrington Place
Paul R. Shearing: Electrochemical Innovation Lab, University College London, Torrington Place

Nature Communications, 2015, vol. 6, issue 1, 1-10

Abstract: Abstract Prevention 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.

Date: 2015
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DOI: 10.1038/ncomms7924

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