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Development of electrochemical hydrogen charge method and exploration of hydride superconductivity

Research Project

Project/Area Number 21K18892
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 29:Applied condensed matter physics and related fields
Research InstitutionTokyo Institute of Technology

Principal Investigator

Shimizu Ryota  東京工業大学, 物質理工学院, 准教授 (70611953)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords金属水素化物 / 複合アニオン化合物 / 薄膜物性 / 光機能 / フォトクロミズム / エレクトロクロミズム / 金属絶縁体転移 / 電気化学 / 超伝導
Outline of Research at the Start

本研究では、Nb-H系薄膜における「水素透過の整流作用」と「電気化学的水素挿入法」を組合せ、常温・常圧環境において高圧相金属水素化物を安定化し、高密度水素に由来する超伝導発現を目指すものである。超伝導はエネルギー問題や量子コンピュータの観点で注目を集めており、新物質探索と超伝導転移温度の上昇を通じた社会へのインパクトをもくろむ。

Outline of Final Research Achievements

We aimed to explore superconductivity by electrochemically adding high-density hydrogen, which is not achieved at ambient pressure, using Nb hydride as an electrode for hydrogen evolution in water electrolysis. However, the superconducting phase did not appear.
In contrast, we found attractive properties in multi-anion hydrides: In yttrium oxyhydride, which exhibits metal-insulator transition by ultraviolet light, we found a fast metal-insulator switching by electrochemical hydrogen insertion/desertion. In the titanium nitrogen-hydrogen compound, we observed a decrease in electrical resistivity by two orders of magnitude, which recovered to the original state immediately after the field cut. In the future, we aim to discover new electronic phases by cooling under an applied electric field.

Academic Significance and Societal Importance of the Research Achievements

本研究では、電気化学的水素チャージ法による金属水素化物の物性変調を目指し、特に光誘起金属化の観測に成功したイットリウム酸水素化物において、固体内水素の脱挿入による光学・電気特性変調に成功した。光・電場という複合的な外場が利用できること、従来数週間かかっていた緩和過程を10秒以内という5桁以上の高速なスイッチングを実現したことから、今後さらに全固体化できれば応用の可能性が拡大することが期待される成果である。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (12 results)

All 2022 2021

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Book (1 results)

  • [Journal Article] Repeatable Photoinduced Insulator-to-Metal Transition in Yttrium Oxyhydride Epitaxial Thin Films2022

    • Author(s)
      Y. Komatsu, Ryota Shimizu, R. Sato, M. Wilde, K. Nishio, T. Katase, D. Matsumura, H. Saitoh, M. Miyauchi, J. R. Adelman, R. M. L. McFadden, D. Fujimoto, J. O. Ticknor, M. Stachura, I. McKenzie, G. D. Morris, W. A. MacFarlane, J. Sugiyama, K. Fukutani, S. Tsuneyuki, T. Hitosugi
    • Journal Title

      Chemistry of Materials

      Volume: 34 Issue: 8 Pages: 3616-3623

    • DOI

      10.1021/acs.chemmater.1c03450

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] YOxHy薄膜の電気化学的金属-絶縁体転移における溶液の寄与2022

    • Author(s)
      小松遊矢、清水亮太、ビルデマーカス、西尾和記、福谷克之、一杉太郎
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Repeatable photo-induced metallization observed in YOxHy epitaxial thin films2022

    • Author(s)
      Ryota Shimizu, Yuya Komatsu, Ryuhei Sato, Markus Wilde, Kazunori Nishio, Katsuyuki Fukutani, Shinji Tsuneyuki, Taro Hitosugi
    • Organizer
      2nd International Symposium “Hydrogenomics"
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 固体内水素の荷電状態制御を通じた金属・絶縁体スイッチング2022

    • Author(s)
      清水亮太
    • Organizer
      水素科学技術連携研究会 6月研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Thermal motion of hydrogen observed in photoinduced YOxHy thin films2022

    • Author(s)
      oY. Komatsu, R. Shimizu, T. Hitosugi, R. Sato, S. Tsuneyuki, M. Wilde, K. Fukutani, H. Saitoh, D. Matsumura, J. O. Ticknor, D. Fujimoto, J. R. Adelman, R. M. L. McFadden, I. McKenzie, M. Stachura, G. D. Morris, W. A. MacFarlane, J. Sugiyama
    • Organizer
      MuSR2020
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アニオン複合化による水素の荷電状態制御と薄膜物性制御2022

    • Author(s)
      清水亮太
    • Organizer
      第5回ハイドロジェノミクス研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 薄膜内水素の組成・荷電状態制御による水素化物物性の開拓2022

    • Author(s)
      清水亮太
    • Organizer
      第70回応用物理学会春季学術講演会「水素化物の研究最前線~物質開発と機能の現状・課題・展望~」
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Photo-induced hydrogen diffusion in yttrium oxy-hydride epitaxial thin films2021

    • Author(s)
      Yuya Komatsu, Jun Sugiyama, Ryota Shimizu, Kazunori Nishio, Masahiro Miyauchi, Markus Wilde, Katsuyuki Fukutani, Ryan McFadden, Martin Dehn, Victoria Karner, Derek Fujimoto, John Ticknor, Aris Chatzichristos, Monika Stachura, David Cortie, Gerald Morris, Dr. Iain McKenzie, W MacFarlane, Taro Hitosugi
    • Organizer
      Pacifichem2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Repeatable photo-induced insulator-to-metal transition in YOxHy epitaxial thin films2021

    • Author(s)
      Yuya Komatsu, Ryota Shimizu, Ryuhei Sato, Markus Wilde, Kazunori Nishio, Daiju Matsumura, Hiroyuki Saitoh, Katsuyuki Fukutani, Shinji Tsuneyuki, Taro Hitosugi
    • Organizer
      Materials Research Meeting
    • Related Report
      2021 Research-status Report
  • [Presentation] Physical properties control in metal hydride epitaxial thin films by tuning c harge state in hydrogen2021

    • Author(s)
      Ryota Shimizu, Yuya Komatsu, Seoungmin Chon, and Taro Hitosugi
    • Organizer
      Materials Research Meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] NaOH水溶液中電場印加によるYOxHy薄膜の金属-絶縁体転移2021

    • Author(s)
      小松 遊矢, 清水 亮太, ビルデ マーカス, 西尾 和記, 福谷 克之, 一杉 太郎
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Book] “水素”を使いこなすためのサイエンス ハイドロジェノミクス2022

    • Author(s)
      折茂 慎一・福谷 克之・藤田 健一編著
    • Total Pages
      224
    • Publisher
      共立出版
    • ISBN
      9784320044982
    • Related Report
      2021 Research-status Report

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Published: 2021-07-13   Modified: 2024-01-30  

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