化学成像
电解质
阳极
电池(电)
锂(药物)
材料科学
离子
分辨率(逻辑)
锂离子电池
相间
电子能量损失谱
纳米技术
透射电子显微镜
分析化学(期刊)
光电子学
化学
电极
功率(物理)
计算机科学
物理
高光谱成像
遗传学
内分泌学
医学
有机化学
物理化学
量子力学
人工智能
色谱法
生物
作者
Jared J. Lodico,Matthew Mecklenburg,Ho Leung Chan,Y. Chen,Xin Yi Ling,B. C. Regan
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2023-07-12
卷期号:9 (28)
被引量:9
标识
DOI:10.1126/sciadv.adg5135
摘要
The lithium-ion battery is currently the preferred power source for applications ranging from smart phones to electric vehicles. Imaging the chemical reactions governing its function as they happen, with nanoscale spatial resolution and chemical specificity, is a long-standing open problem. Here, we demonstrate operando spectrum imaging of a Li-ion battery anode over multiple charge-discharge cycles using electron energy-loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). Using ultrathin Li-ion cells, we acquire reference EELS spectra for the various constituents of the solid-electrolyte interphase (SEI) layer and then apply these "chemical fingerprints" to high-resolution, real-space mapping of the corresponding physical structures. We observe the growth of Li and LiH dendrites in the SEI and fingerprint the SEI itself. High spatial- and spectral-resolution operando imaging of the air-sensitive liquid chemistries of the Li-ion cell opens a direct route to understanding the complex, dynamic mechanisms that affect battery safety, capacity, and lifetime.
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