In-situ Interface Analysis Group
GREEN Leader
Research
Electron microscopy of battery materials
In order to improve the performance of secondary battery, we perform transmission electron microscopy for various battery materials and development of microscopy techniques for those materials.
The figure is an example of a defect in La0.55Li0.33TiO3 (LLTO) TEM observation which is a solid electrolyte with high ion-conductivity that having the alternatively ordered arrangement of La ions on the perovskite A-sites along the c-axis. In this study, it was revealed that La is concentrated at the defect boundary and may block Li conduction at the interface.
(a) Planer defect in La0.55Li0.33TiO3 (LLTO),
(b) and (c) magnified image and the intensity line profile indicating the heavy element concentrate at the interface.
Elemental map image of the defect showing La is concentrated at the defect boundary.
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