In situ visualization of Li concentration in all-solid-state lithium ion batteries using time-of-flight secondary ion mass spectrometry
In situ visualization of Li concentration in all-solid-state lithium ion batteries using time-of-flight secondary ion mass spectrometry
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DOI：
10.1016/j.jpowsour.2018.08.040
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发表时间：
2018-10-01
影响因子：
9.2
通讯作者：
Fujita, Daisuke
中科院分区：
文献类型：
--
作者：
Masuda, Hideki;Ishida, Nobuyuki;Fujita, Daisuke
锂离子电池（LIBs）是最重要的储能设备。直接表征锂离子在电池运行过程中的行为的新方法对于理解电池的基本工作原理和提高其设备性能非常令人垂涎。在这项研究中，我们开发了一种基于飞行时间二次离子质谱技术和原位电测量系统的新方法来可视化全固态（ASS） lib电极中Li离子分布的变化。我们成功地直接观察到在充放电循环过程中阴极复合电极中Li浓度的下降/增加。我们的方法为表征用于提高器件性能的ASS lib的基本方面铺平了道路，包括锂耗尽区域的评估，导电路径的可视化和器件退化原因的分析。
Lithium ion batteries (LIBs) are the most important energy storage devices. Novel methods for directly characterizing the behavior of Li ions during battery operations are highly coveted for understanding the fundamental working principles of the batteries and improving their device performances. In this study, we developed a novel method to visualize the change in Li ion distribution in the electrodes of all-solid-state (ASS) LIBs based on the time-of-flight secondary ion mass spectrometry technique with an in situ electrical measurement system. We succeeded in directly visualizing the decrease/increase of Li concentration in the cathode composite electrode during the charging/discharging cycles. Our method paves the way to characterize the fundamental aspects of ASS LIBs for improving device performance, including the evaluation of Li-depleted regions, visualization of the conductive paths and analysis of the causes of device degradation.