In-situ neutron and X-ray scattering investigations for lithium-ion battery materials

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06483
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Kyoto University
• Principal Investigator: MORI KAZUHIRO 京都大学, 原子炉実験所, 准教授 (40362412)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 中性子 / 放射光X線 / 電池材料 / イオン伝導体

Outline of Final Research Achievements

The structural and dynamical properties of all-solid-state lithium-ion batteries, particularly solid electrolyte materials, were studied using neutron and synchrotron X-ray scattering, or quantum beams. We developed a cell for measuring neutron diffraction data of the Li7P3S11 solid electrolyte under an applied voltage (or in-situ neutron diffraction data). It was found that no structural change occurs under the applied voltage. The conduction pathways of Li ions in the Li2S-GeS2 glasses and Li10GeP2S12 solid electrolyte were visualized using the technique based on the bond valence sum approach. Furthermore, we directly observed the fast Li-ion diffusion in the Li7P3S11 solid electrolyte using quasielastic neutron scattering.

Free Research Field

中性子回折