Institute of Multidisciplinary Research for Advanced Materials, Tohoku University


LAST UPDATE 2023/08/04

  • 研究者氏名
    Researcher Name

    村上美和 Miwa MURAKAMI
    准教授 Associate Professor
  • 所属
    Professional Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

    金属資源プロセス研究センター 原子空間制御プロセス研究分野
    Center for Mineral Processing and Metallurgy, Atomic Site Control in Inorganic Materials
  • 研究キーワード
    Research Keywords

    High-resolution NMR in solids
    Ionic conduction/diffusion in solids
    Inorganic structural chemistry
    Rechargeable batteries
Research Subject
固体高分解能 NMRによるイオン伝導体の解析
Application of high-resolution solid-state NMR to ion-conduction materials

研究の背景 Background


To realize the sustainable society, energy use in high efficiency is pre-requisite. In that, all-solid battery attracts attention and considerable ingenuity has been brought to develop all-solid battery in these days. One of the research targets is a solid-ion conductor, in which a charged ion can be transported during the charge/discharge processes. For structural analysis of a solid-ion conductor, a complementary use of diffraction and solid-state NMR is desirable as the former, for example, X-ray diffraction, is suitable for analysis of long-range structure, while the latter is sensitive to local structure.

研究の目標 Outcome


To examine local structure including defects, which allow ion conduction by solid-state NMR, I have been developing new NMR techniques and applied to various solid materials. Further, complementary use of information regarding ion dynamic obtained by conventional NMR experiments, such as, relaxation times and lineshape analysis, with those obtained by other spectroscopic means, such as, AC-impedance and diffusion measurements using field gradient is my target.

研究図Research Figure

Fig.1. NMR observable and corresponding timescale

Fig.2. Temperature dependence of T1

Fig.3. Temperature dependence of NMR line shape

文献 / Publications

村上美和、固体NMRによるイオン伝導体のダイナミクス解析 電気化学(2023)
M. Murakami et al, J. Phys. Chem. C 2022, 126, 20135−20142