The In-situ Characterization of Fast-charging Degradation Modes in Li-ion Batteries Using High-resolution Neutron Imaging

IF 1.7 Q4 ELECTROCHEMISTRY
Maha Yusuf
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引用次数: 0

Abstract

Extreme fast charging (XFC) of lithium-ion batteries (LIBs) in 10 minutes is one of the main goals of the US Advanced Battery Consortium for low-cost, fast-charged electric vehicles by 2023. However, existing LIBs cannot achieve these XFC goals without significant capacity fade over cycling due to complex XFC degradation modes. One of the key XFC failure mechanisms is dead Li plating on the graphite anode. While numerous methods have detected Li plating, they lack three-dimensional non-invasive visualization of dead Li on graphite anodes in full cells during battery cycling. Herein, we demonstrate the viability of high-resolution (spatial resolution: 10–15 μm) neutron micro-computed tomography (μCT) for in-situ characterization of dead Li on graphite anodes (thickness: ~130 μm) in full cells containing NMC cathode, that were cycled at 1C and 6C.
利用高分辨率中子成像原位表征锂离子电池的快速充电退化模式
美国先进电池联盟(US Advanced Battery Consortium)的主要目标之一是到2023年实现低成本、快速充电的电动汽车在10分钟内实现锂离子电池(lib)的极快充电(XFC)。然而,由于复杂的XFC退化模式,现有的lib无法在没有显著容量衰减的情况下实现这些XFC目标。XFC失效的关键机制之一是石墨阳极上的死锂镀。虽然有许多方法可以检测到锂镀层,但它们缺乏电池循环过程中石墨阳极上死锂的三维非侵入性可视化。在此,我们证明了高分辨率(空间分辨率:10-15 μm)中子微计算机断层扫描(μCT)在含NMC阴极的全电池中(在1C和6℃循环)原位表征石墨阳极(厚度:~130 μm)上死锂的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.10
自引率
5.60%
发文量
62
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