Direct measurement of nanoscale lithium diffusion in solid battery materials using radioactive tracer of 8Li

H. Ishiyama, S. C. Jeong, Y. X. Watanabe, Y. Hirayama, N. Imai, H. S. Jung, H. Miyatake, M. Oyaizu, A. Osa, Y. Otokawa, M. Matsuda, K. Nishio, H. Makii, T. K. Sato, N. Kuwata, J. Kawamura, H. Ueno, Y. H. Kim, S. Kimura, M. Mukai

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    We have developed an in situ and nanoscale Li diffusion measurement method in Li battery materials using an α-emitting radioactive 8Li tracer. In this method, while implanting a low-energy (8 keV) 8Li beam, the α particles emitted at a small angle (10°) relative to the sample surface were detected as a function of time. Measurement for Li diffusion coefficients in a spinel phase LiMn2O4 (LMO) thin film has been started, which is used as an electrode in a Li ion secondary battery. An obvious Li diffusion effect in LMO was observed at the sample temperature of 623 K, and the further measurement is underway.

    Original languageEnglish
    Pages (from-to)379-381
    Number of pages3
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Volume376
    DOIs
    Publication statusPublished - 2016 Jun 1

    Keywords

    • Li ion secondary battery
    • Lithium diffusion coefficient
    • Radioactive tracer

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Instrumentation

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