离子
电子全息术
材料科学
电化学
电解质
电池(电)
透射电子显微镜
电极
电子
电子能量损失谱
光电子学
纳米技术
化学
功率(物理)
有机化学
物理化学
物理
量子力学
作者
Kazuo Yamamoto,Yasutoshi Iriyama,Tsukasa Hirayama
出处
期刊:Microscopy
[Oxford University Press]
日期:2016-10-12
被引量:2
标识
DOI:10.1093/jmicro/dfw106
摘要
All-solid-state Li-ion batteries having incombustible solid electrolytes are promising energy storage devices because they have significant advantages in terms of safety, lifetime and energy density. Electrochemical reactions, namely, Li-ion insertion/extraction reactions, commonly occur around the nanometer-scale interfaces between the electrodes and solid electrolytes. Thus, transmission electron microscopy (TEM) is an appropriate technique to directly observe such reactions, providing important information for understanding the fundamental solid-state electrochemistry and improving battery performance. In this review, we introduce two types of TEM techniques for operando observations of battery reactions, spatially resolved electron energy-loss spectroscopy in a TEM mode for direct detection of the Li concentration profiles and electron holography for observing the electric potential changes due to Li-ion insertion/extraction reactions. We visually show how Li-ion insertion/extractions affect the crystal structures, electronic structures, and local electric potential during the charge-discharge processes in these batteries.
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