AC impedance analysis of degraded sulfide-based solid electrolytes in a dry-room-simulated environment and its recovery

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  • SANO Hikaru
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • MORINO Yusuke
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • YABUKI Akinori
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • SATO Shimpei
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • ITAYAMA Naohiko
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • MATSUMURA Yasuyuki
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • IWASAKI Masahiro
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • TAKEHARA Masahiro
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • ABE Takeshi
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • ISHIGURO Yasuo
    Consortium for Lithium Ion Battery Technology and Evaluation Center (LIBTEC)
  • TAKAHASHI Tsukasa
    Mitsui Mining and Smelting Co., Ltd.
  • MIYASHITA Norihiko
    Mitsui Mining and Smelting Co., Ltd.
  • SAKUDA Atsushi
    Graduate School of Engineering, Osaka Prefecture University
  • HAYASHI Akitoshi
    Graduate School of Engineering, Osaka Prefecture University

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タイトル別名
  • AC Impedance Analysis of the Degeneration and Recovery of Argyrodite Sulfide-Based Solid Electrolytes under Dry-Room-Simulated Condition

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説明

<p>Toward the development of all-solid-state batteries with enhanced performance, this study describes the investigation of the degeneration mechanism under low-humid conditions of an argyrodite-type sulfide-based solid electrolyte. The degeneration of the electrolyte with moisture occurs even under the condition of super-low humidity in a dry room with a dew point (dp) as low as −50 °Cdp. Formation of hydrogen sulfide is detected when the electrolyte is exposed to dry air with −20 °Cdp. The results of impedance measurements suggest that the grain surface of the electrolyte is degenerated with moisture, resulting in a decrease in the lithium-ion conductivity at the grain boundary. The degenerated electrolyte surface can be partially recovered by heating at 170 °C in vacuo, although a small degeneration in bulk may occur in the heating process.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 90 (3), 037012-037012, 2022-03-29

    公益社団法人　電気化学会

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