In-operando high-speed tomography of lithium-ion batteries during thermal runaway.
In-operando high-speed tomography of lithium-ion batteries during thermal runaway.
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DOI：
10.1038/ncomms7924
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发表时间：
2015-04-28
影响因子：
16.6
通讯作者：
Shearing, Paul R.
中科院分区：
文献类型：
--
作者：
Finegan, Donal P.;Scheel, Mario;Robinson, James B.;Tjaden, Bernhard;Hunt, Ian;Mason, Thomas J.;Millichamp, Jason;Di Michiel, Marco;Offer, Gregory J.;Hinds, Gareth;Brett, Dan J. L.;Shearing, Paul R.
预防和缓解热失控是锂离子电池安全运行的最大挑战之一。在这里，我们首次展示了高速同步加速器 X 射线计算机断层扫描和射线照相与热成像的应用，以跟踪锂离子电池热失控引发和传播过程中内部结构损伤和热行为的演变。该诊断方法适用于商用锂离子电池（LG 18650 NMC 电池），可深入了解关键的退化模式，包括气体引起的分层、电极层塌陷和结构退化的传播。预计这些技术的使用将导致锂离子电池的设计及其安全特性的重大改进。 了解热致电池退化的机制和任何安全隐患非常重要。在这里，作者使用高速同步辐射 X 射线计算机断层扫描来揭示与商用锂离子电池热失控和故障相关的结构和热动力学。
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. It is important to understand the mechanisms of thermally induced battery degradation and any safety hazards. Here, the authors use high-speed synchrotron radiation X-ray computed tomography to shed light on the structural and thermal dynamics associated with thermal runaway and failure of commercial Li-ion batteries.
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