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Microscopic ion migration in solid electrolytes revealed by terahertz time-domain spectroscopy

Author

Listed:
  • Tomohide Morimoto

    (Osaka University)

  • Masaya Nagai

    (Osaka University
    Osaka University)

  • Yosuke Minowa

    (Osaka University)

  • Masaaki Ashida

    (Osaka University
    Osaka University)

  • Yoichiro Yokotani

    (Osaka University)

  • Yuji Okuyama

    (University of Miyazaki)

  • Yukimune Kani

    (Panasonic Corporation)

Abstract

Terahertz spectroscopy is one of the most suitable methods for the analysis of electron transport in solids, and has been applied to various materials. Here, we demonstrate that terahertz spectroscopy is the technique of choice to characterize solid electrolytes. We measure the terahertz conductivity of stabilized zirconia, a widely used solid electrolyte material, by terahertz time-domain spectroscopy at high temperatures, providing a wealth of information unavailable from conventional techniques. It is found that the conductivity reflects the microscopic motion of the ion just before hopping to an unoccupied site. Our results suggest a powerful approach in probing the ionic conduction mechanism and could help us explore other solid electrolytes for fuel cells and all-solid-state batteries.

Suggested Citation

  • Tomohide Morimoto & Masaya Nagai & Yosuke Minowa & Masaaki Ashida & Yoichiro Yokotani & Yuji Okuyama & Yukimune Kani, 2019. "Microscopic ion migration in solid electrolytes revealed by terahertz time-domain spectroscopy," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10501-9
    DOI: 10.1038/s41467-019-10501-9
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