Journal
NATURE COMMUNICATIONS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms7924
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Funding
- Royal Academy of Engineering
- EPSRC
- National Physical Laboratory
- STFC through the Global Challenge Network in Batteries and Electrochemical Energy Devices
- Engineering and Physical Sciences Research Council [1528603, EP/I00422X/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/K00171X/1] Funding Source: researchfish
- EPSRC [EP/I00422X/1] Funding Source: UKRI
- STFC [ST/K00171X/1] Funding Source: UKRI
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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.
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