2015 年 58 巻 10 号 p. 357-366
Recently, lithium atomic columns have been visualized by a new method of scanning transmission electron microscopy (STEM) called as annular bright field (ABF) imaging. We show that the number of lithium atoms in individual columns can be countable by quantitative analysis and the atoms at the surface layer can be detectable by using large convergent electron beam. We also show local structural transformation accompanied by the displacement of lithium ions for LiV2O4 crystals by in-situ ABF observation. We briefly present operand TEM observation of the lithium ion battery, consisting of LiMn2O4 cathode nanowire, ionic liquid electrolyte and Li4Ti5O12 anode.