In situ lithium diffusion measurement in solid ionic conductors using short-lived radiotracer beam of 8Li

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

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    We developed an in situ radiotracer method for diffusion studies in solids using short-lived α-emitting 8Li tracer. In the method, while implanting a pulsed 8Li beam into a solid material of interest, the α particles emitted into the implantation side of the sample surface were detected as a function of time. By changing the implantation depth and the detection angle against the sample surface according to lithium diffusivity (deep implantation and large angle with a large solid angle, or shallow implantation and small angle with a narrow solid angle), the method can be sensitive to a wide range of diffusion length ranging from micrometer scale to nanometer scale per second. The feasibility of the method was demonstrated by measuring the lithium diffusion coefficients to the order of 10-12 cm2/s in lithium ionic conductors.

    Original languageEnglish
    Pages (from-to)297-300
    Number of pages4
    JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
    Volume354
    DOIs
    Publication statusPublished - 2015 Jul 1

    Keywords

    • Implantation
    • Lithium diffusion
    • Lithium ion battery
    • Lithium ionic conductors
    • Lithium radiotracer

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Instrumentation

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