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Development of material conversion devices utilizing hydrogen charge flexibility

Research Project

Project/Area Number 22K18909
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

KOBAYASHI Genki  国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (30609847)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywordsヒドリドイオン導電体 / 電気化学 / 固体イオニクス / 水素 / ヒドリドイオン導電 / 電解 / 物質変換 / 電気化学デバイス
Outline of Research at the Start

本研究では,水素化物イオン(ヒドリド:H-)の強力な還元力に着目している。研究代表者が世界に先駆けて開発したH-導電性固体電解質を活用し,H-を電気化学的に化学反応場に供給するデバイス反応の実現を目指す。さらに,作成したデバイスを用いてCO2還元反応を検討し,H-/H+間の水素の電荷自由度を活用した 物質変換デバイスの実現可能性を検証する。

Outline of Final Research Achievements

Elemental substitution into Ba1.75LiH2.7O0.9 (BLHO), which shows H- superionic conductivity via a phase transition at 300 °C, stabilizes the superionic conduction state at low temperatures and enables the formation of an electrode/electrolyte interface. The sintering process of BLHO-based hydride ion conductors was also investigated, and the relative density was successfully increased to 98%, enabling solid electrolyte applications at 300 - 350 ℃.
Electrochemical devices using the BLHO-based solid electrolyte were fabricated and found to be able to convert nitrogen to ammonia by an electrochemical reaction at a rate exceeding the theoretical conversion efficiency at 350 ℃ and 1 atm.

Academic Significance and Societal Importance of the Research Achievements

ヒドリドイオン導電体の導電率向上のみならず、焼結などの固体電解質応用につながる要素技術開発に取り組んでデバイス化を実現したことは、ヒドリドの還元力を活用した新たな電気化学応用の創出に直結する成果であり、ヒドリドのイオニクス研究を新たなステージに押し上げたといえる。また、デバイス化によって実現した高効率な窒素-アンモニア転換反応は、将来的な水素エネルギー利用の基盤になり得る成果であり、社会的な意義も大きい。

Report

(2 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (27 results)

All 2023 2022 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (21 results) (of which Int'l Joint Research: 8 results,  Invited: 9 results) Remarks (2 results)

  • [Journal Article] Barium Indate-Zirconate Perovskite Oxyhydride with Enhanced Hydride Ion/Electron Mixed Conductivity2022

    • Author(s)
      H. Toriumi, G. Kobayashi, T. Saito, T. Kamiyama, T. Sakai, T. Nomura, S. Kitano, H. Habazaki, and Y. Aoki
    • Journal Title

      Chemistry of Materials

      Volume: 34 Issue: 16 Pages: 7389-401

    • DOI

      10.1021/acs.chemmater.2c01467

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Trihalide Mixing by Size-Flexible H- Ions in Layered Ba2H3 (Cl, Br, I)2022

    • Author(s)
      H. Ubukata, F. Takeiri, C. Tassel, S. Kobayashi, S. Kawaguchi, T. Saito, T. Kamiyama, S. Kobayashi, G. Kobayashi, and H. Kageyama*
    • Journal Title

      Chemistry of Materials

      Volume: 34 Issue: 12 Pages: 5654-62

    • DOI

      10.1021/acs.chemmater.2c01004

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stabilization of a high H--conducting phase via K doping of Ba-Li oxyhydride2022

    • Author(s)
      Okamoto Kei、Takeiri Fumitaka、Imai Yumiko、Yonemura Masao、Saito Takashi、Ikeda Kazutaka、Otomo Toshiya、Kamiyama Takashi、Kobayashi Genki
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 10 Issue: 43 Pages: 23023-23027

    • DOI

      10.1039/d2ta06278j

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Impact of Na Concentration on the Phase Transition Behavior and H- Conductivities in the Ba-Li-Na-H-O Oxyhydride System2022

    • Author(s)
      Okamoto Kei、Takeiri Fumitaka、Imai Yumiko、Yonemura Masao、Saito Takashi、Ikeda Kazutaka、Otomo Toshiya、Kamiyama Takashi、Kobayashi Genki
    • Journal Title

      Advanced Science

      Volume: 10 Issue: 1 Pages: 2203541-2203541

    • DOI

      10.1002/advs.202203541

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] GaO4 ポリアニオンを含むアンチペロブスカイト型酸水素化物2023

    • Author(s)
      竹入史隆, 小林玄器, Nur Ika Puji Ayu, 萩原雅人, 齊藤高志, 神山崇, 小川貴史, 桑原彰秀
    • Organizer
      日本セラミックス協会 2023年年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Hydride Superionic Conduction in Ba1.75LiH2.7O0.92022

    • Author(s)
      Genki Kobayashi
    • Organizer
      CIMTEC 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 酸水素化物中のアニオン配列とヒドリド導電特性2022

    • Author(s)
      小林玄器
    • Organizer
      日本セラミックス協会 第55回基礎科学部会セミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Impact of Na Concentration on the Phase Transition Behavior and Conductivities of Ba2(Li1-xNax)H3O solid solution2022

    • Author(s)
      Kei Okamoto
    • Organizer
      SSI23 23rd International Conference on Solid State Ionics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of H-concentration on electrode properties for perovskite-type oxyhydride BaTiO3-xHx2022

    • Author(s)
      Tasuku Uchimura
    • Organizer
      SSI23 23rd International Conference on Solid State Ionics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] H- conduction property of fluorite-type La1-xSrxH3-x2022

    • Author(s)
      Yoshiki Izumi, Fumitaka Takeiri, Kei Okamoto, Takashi Saito, Takashi Kamiyama, Genki Kobayashi,
    • Organizer
      IUMRS-ICYRAM 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Impact of Na Concentration on the Phase Transition Behavior and H- Conductivities of Ba2(Li1-xNax)H3O2022

    • Author(s)
      Kei Okamoto, Fumitaka Takeiri, Masao Yonemura, Takashi Saito, Kazutaka Ikeda, Toshiya Otomo, Takashi Kamiyama, Genki Kobayashi
    • Organizer
      IUMRS-ICYRAM 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 水素のアニオン“ヒドリド”が導電する物質系の開拓2022

    • Author(s)
      小林玄器
    • Organizer
      金沢大学 物質化学類 応化コース
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] ヒドリドイオン導電体の物質開拓2022

    • Author(s)
      小林玄器
    • Organizer
      アドバンスト・バッテリー技術研究会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Effect of anion configuration on the phase transition behavior and hydride ion conductivities in Ba-Li oxyhydrides2022

    • Author(s)
      Genki Kobayashi
    • Organizer
      ICNS International Conference of Neutron Scattering
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ヒドリドイオン導電性材料の物質開拓2022

    • Author(s)
      小林玄器
    • Organizer
      第117回新電池構想部会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Direct preparation of barium titanate oxyhydride exhibiting H-/e- mixed conduction2022

    • Author(s)
      Fumitaka Takeiri, Tasuku Uchimura, Takashi Saito, Takashi Kamiyama, Genki Kobayashi,
    • Organizer
      ACSSI-17 17th Asian Conference on Solid State Ionics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] H- conduction property of fluorite-type La1-xSrxH3-x2022

    • Author(s)
      Yoshiki Izumi, Fumitaka Takeiri, Kei Okamoto, Takashi Saito, Takashi Kamiyama, Genki Kobayashi
    • Organizer
      ACSSI-17 17th Asian Conference on Solid State Ionics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] ヒドリドイオン導電性材料の研究 ~現状と今後の展望~2022

    • Author(s)
      小林玄器
    • Organizer
      日本金属学会2022年 秋期講演大会
    • Related Report
      2022 Research-status Report
  • [Presentation] ヒドリドイオン導電性材料の研究 ~物質開発の現状と今後~2022

    • Author(s)
      小林玄器
    • Organizer
      第82回固体イオニクス研究会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Study on hydride ion conductors: Progress and prospects2022

    • Author(s)
      小林玄器
    • Organizer
      Core to Core Seminar
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 層状ペロブスカイト型酸水素化物におけるヒドリド超イオン導電2022

    • Author(s)
      小林玄器
    • Organizer
      第32回日本MRS年次大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] ペロブスカイト型BaZr0.5In0.5O2.75-xHy酸水素化物の構造とH-/e-混合伝導性2022

    • Author(s)
      鳥海創, 小林玄器 , 齊藤高志, 神山崇, 酒井孝明, 能村貴宏 , 北野翔, 幅崎浩樹, 青木芳尚
    • Organizer
      第48回固体イオニクス討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] ペロブスカイト型酸水素化物BaTiO3-xHxのメカノケミカル合成と電極特性(II)2022

    • Author(s)
      竹入史隆, 内村祐, 齊藤高志, 神山崇, 小林玄器
    • Organizer
      第48回固体イオニクス討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] 蛍石型La1-x SrxH3-x のH-導電特性2022

    • Author(s)
      泉善貴, 竹入史隆, 岡本啓, 齊藤高志, 神山崇, 桑原彰秀, 小林玄器
    • Organizer
      第48回固体イオニクス討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] H-のサイズ柔軟性により実現したBa2H3(Cl,Br,I)におけるCl-Br-I固溶およびH-イオン伝導性2022

    • Author(s)
      生方宏樹 , 竹入史隆 , TASSEL Cedric, 小林慎太郎, 河口省吾, 齊藤高志, 神山崇, 小林俊介, 小林玄器, 陰山洋
    • Organizer
      第48回固体イオニクス討論会
    • Related Report
      2022 Research-status Report
  • [Remarks] 理化学研究所 小林固体化学研究室

    • URL

      https://www.riken.jp/research/labs/chief/solid_st_chem/index.html

    • Related Report
      2022 Research-status Report
  • [Remarks] 分子科学研究所 小林グループ

    • URL

      https://www.ims.ac.jp/organization/kobayashi_g/index.html

    • Related Report
      2022 Research-status Report

URL: 

Published: 2022-07-05   Modified: 2025-01-30  

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