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The rational design for the material with high proton conductivity and low dependence on humidity

Research Project

Project/Area Number 19K15351
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 27020:Chemical reaction and process system engineering-related
Research InstitutionKyoto University

Principal Investigator

Ogawa Takaya  京都大学, エネルギー科学研究科, 特定助教 (90748550)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywordsプロトン伝導 / 量子効果 / 電解質 / 電解合成 / 燃料電池 / プロトンチャネル
Outline of Research at the Start

プロトン(H+)伝導性の湿度依存性が非常に低い、酸高密度構造における新規H+伝導機構Packed-acid mechanismの発現条件を探索・拡張し、実用化への可能性を広げる。硫酸・リン酸等の酸溶液(溶媒は水やピリジン等)の濃度を変化させ、各濃度におけるH+伝導度・H+拡散係数・活性化エネルギー・酸解離度等を調べる。これより、Packed-acid mechanismでH+伝導性が向上する条件を探索する。また、酸溶液を量子化学計算によって再現し、分子動力学計算でH+の挙動を観察して、伝導度が向上する原因を解明する。そして更なる伝導度向上の指針を得て、実験側にフィードバックをかける。

Outline of Final Research Achievements

The effect of various acids and water on the conditions under which the packed-acid mechanism occurs in different proton acceptors was investigated. Quantum chemical calculations show that as the pKa of the proton acceptor's covalent acid increases, the proton donor must use a lower acid pKa to prevent the acid interaction between the proton donors from extending to distant hydrogen bonds. In addition, when the pKa of the co-beneficial acid is high, the acid interaction by the co-beneficial acid is also small. In other words, the Packed-acid mechanism is enhanced by using a proton acceptor with low proton acceptor (basicity).

Academic Significance and Societal Importance of the Research Achievements

本研究により、Packed-acid mechanismをより引き起こすために重要な酸・塩基の選定に重要なパラメーターがわかり、Packed-acid mechanismが支配的に起こるプロトン伝導固体材料を開発するための設計指針を得ることができた。一方で、実験的なプロトン伝導度は、溶液の粘度と酸解離度に大きく影響されていることがわかった。また、酸高密度溶液では同位体効果が大きく現れることが実験的に示された。トンネル効果をより引き起こす条件を特定できれば、、通常なら起こり得ない難しい反応も酸・塩基溶液の相互作用に基づくトンネル効果で促進できることが示唆された。

Report

(3 results)
  • 2020 Final Research Report ( PDF )
  • 2019 Research-status Report
  • Products Report
  • Research Products

    (12 results)

All 2022 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (5 results) (of which Int'l Joint Research: 3 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] Damp-heat durability comparison of Al-doped ZnO transparent electrodes deposited at low temperatures on glass and PI-tape/PC substrates2020

    • Author(s)
      Machda Fahmi、Ogawa Takaya、Okumura Hideyuki、Ishihara Keiichi N.
    • Journal Title

      Ceramics International

      Volume: in press Issue: 10 Pages: 16178-16184

    • DOI

      10.1016/j.ceramint.2020.03.173

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] The effect of substrate roughness on the properties of RF sputtered AZO thin film2019

    • Author(s)
      Hamada Kairi、Ogawa Takaya、Okumura Hideyuki、Ishihara Keiichi N.
    • Journal Title

      MRS Communications

      Volume: 9 Issue: 2 Pages: 697-701

    • DOI

      10.1557/mrc.2019.66

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Proton diffusion facilitated by indirect interactions between proton donors through several hydrogen bonds2019

    • Author(s)
      Takaya Ogawa, Hidenori Ohashi, Takanori Tamaki, and Takeo Yamaguchi
    • Journal Title

      Chemical Physics Letters

      Volume: 731 Pages: 136627-136627

    • DOI

      10.1016/j.cplett.2019.136627

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evolution and Recovery of Electrical Property of Reactive Sputtered Al‐Doped ZnO Transparent Electrode Exposed to Harsh Environment2019

    • Author(s)
      Machda Fahmi、Ogawa Takaya、Okumura Hideyuki、Ishihara Keiichi N.
    • Journal Title

      physica status solidi (a)

      Volume: 217 Issue: 3 Pages: 1900519-1900519

    • DOI

      10.1002/pssa.201900519

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Damp Heat Durability of Al-Doped ZnO Transparent Electrodes with Different Crystal Growth Orientations2019

    • Author(s)
      Machda Fahmi、Ogawa Takaya、Okumura Hideyuki、Ishihara Keiichi N.
    • Journal Title

      ECS Journal of Solid State Science and Technology

      Volume: 8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Development of Carrier Concentration and Its Effects on the Electrical Stability of Al- doped ZnO Transparent Electrode in Harsh Environment,2019

    • Author(s)
      Fahmi Machda, Takaya Ogawa, Hideyuki Okumura, and Keiichi N. Ishihara
    • Organizer
      Compound Semiconductor Week 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of Sputtering Gas on Crystal Growth Orientations and Durability of Al-Doped ZnO Transparent Electrodes in Harsh Environment2019

    • Author(s)
      Fahmi Machda, Takaya Ogawa, Hideyuki Okumura, and Keiichi N. Ishihara
    • Organizer
      THE 26th INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of sputtering gas on crystal growth orientations and durability of al-doped ZnO transparent electrodes in harsh environment.2019

    • Author(s)
      Fahmi Machda, Takaya Ogawa, Hideyuki Okumura, and Keiichi N. Ishihara
    • Organizer
      26th International Workshop on Active-Matrix Flatpanel Displays and Devices
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ボールレスミリングにおけるプラスチックを利用した金属粉末表面の窒化2019

    • Author(s)
      小川 敬也, 磯野 航也, 奥村 英之, 石原 慶一
    • Organizer
      粉体粉末冶金協会2019年度秋季大会 (第124回講演大会)
    • Related Report
      2019 Research-status Report
  • [Presentation] スピンバルブライク複合膜磁気構造による非磁性薄膜物性制御の挑戦2019

    • Author(s)
      奥村 英之, 高木 宣俊, 小川 敬也, 石原 慶一
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 複合膜2022

    • Inventor(s)
      小川敬也、谷内太陽、吉田将基、中薗敏樹、長尾優
    • Industrial Property Rights Holder
      国立大学法人京都大学、帝人株式会社
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      Products Report
  • [Patent(Industrial Property Rights)] 窒素の処理方法、窒素原子含有材料の製造方法及び混合物2020

    • Inventor(s)
      小川敬也, 磯野航也, 奥村英之, 石原慶一
    • Industrial Property Rights Holder
      小川敬也, 磯野航也, 奥村英之, 石原慶一
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-044780
    • Filing Date
      2020
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-03-28  

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