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Air-stable and water-resistant n-type organic thermoelectric materials using rational design of molecular-cationic dopant

Research Project

Project/Area Number 21K14428
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26040:Structural materials and functional materials-related
Research InstitutionTokyo Metropolitan University (2023)
Tokyo University of Science, Yamaguchi (2021-2022)

Principal Investigator

Hata Shinichi  東京都立大学, 都市環境科学研究科, 特任准教授 (20796271)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsカーボンナノチューブ / 界面活性剤 / 有機熱電材料 / n型半導体 / n型伝導 / 両親媒性ドーパント / Li イオン受容体分子 / 水和水 / 有機熱電 / 分子ラッピング / 比表面積 / 耐水性 / 超分子 / 高分子 / 化学ドーピング / 金属ナノ粒子
Outline of Research at the Start

エネルギー自給率向上を望む我が国では、化石燃料由来の未利用低温排熱を電気に変換する軽量かつ柔軟な有機熱電モジュールの実現が強く求められる。しかしその性能を真に発揮するには、構成部であるn型有機材料の空気中酸素・水に起因した性能劣化を防ぐことが必要不可欠であった。一方、申請者が調製したカチオン性界面活性剤ドープカーボンナノチューブ(CNT)では、水中でn型有機熱電特性の劣化が2週間もなく、世界に先駆けて安定化の知見を得ている。本研究では特異な安定化機構とnドープ挙動を解明するとともに、“分子性カチオンドーパント”を適切に構造制御することで、この材料の発電性能を実用水準まで発展させることを目指す。

Outline of Final Research Achievements

n-type organic semiconductors have been extensively studied over the past few decades, but face the challenges of relatively low charge carrier mobility and low stability to ambient air and water, as well as a lack of fabrication methods adaptable to industrial processes. These challenges have limited the development of the organic materials field. Therefore, this study aimed to develop molecular dopants to induce n-type properties in carbon nanotubes (CNTs), which have the ability to convert unused heat (below 150°C) released into the atmosphere into electricity. It was found that molecular wrapping of the nanotubes with specific surfactant molecules protects the carrier electrons and improves their stability and water resistance in the atmosphere.

Academic Significance and Societal Importance of the Research Achievements

CNT上のカチオン性ドーパントマトリックス領域を拡大して空気・水/CNT 界面領域を大幅に縮小すると、安定した電子輸送特性がさらに向上する可能性があり、今後の研究で調査する必要がある。従来多くの研究では、有機溶媒中でCNTを金属イオン、アミン化合物、またはアンモニウム塩で処理することによってnドーピング処理が行われてきた。これと比較すると、本課題のドーパント処理は希薄な界面活性剤水溶液中で実行され、長寿命なn型CNTを調製できる。本課題では、幅広い環境温度・湿度環境にて動作するエネルギーハーベスティングおよびセンシング用途向けの高効率熱電モジュールを開発するための新しい研究が可能になる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (16 results)

All 2024 2023 2022 2021

All Journal Article (8 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (8 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Prolonging the n-type conduction of thermoelectric carbon nanotubes exposed to warm air by mixing hydrated water into the adsorbed dopant layers composed of Li+-receptor molecules2024

    • Author(s)
      Hata Shinichi、Nakagawa Chika、Taketoshi Ayako、Murayama Toru、Ishida Tamao、Du Yukou、Shiraishi Yukihide、Toshima Naoki
    • Journal Title

      RSC Applied Interfaces

      Volume: - Issue: 3 Pages: 430-434

    • DOI

      10.1039/d3lf00239j

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Long-Alkyl-Chain Phosphonium Surfactant Molecular Wrapping to Block Oxygen Impurities in n-Type Carbon Nanotubes for Thermoelectric Applications2023

    • Author(s)
      S. Hata, F. Kitano, H. Ihara, T. Murayama, Y. Du, Y. Shiraishi, and N. Toshima
    • Journal Title

      ACS Applied Engineering Materials

      Volume: 1 Issue: 3 Pages: 894-900

    • DOI

      10.1021/acsaenm.2c00264

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] n-Type thermoelectric behavior in oxyethylene surfactant/carbon nanotubes2023

    • Author(s)
      Hata Shinichi、Le Thu Thao Huynh、Ihara Hiroki、Du Yukou、Shiraishi Yukihide、Toshima Naoki
    • Journal Title

      Energy Advances

      Volume: 2 Issue: 1 Pages: 86-90

    • DOI

      10.1039/d2ya00226d

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Water‐resistant organic thermoelectric generator with >10?μW output2022

    • Author(s)
      Hata Shinichi、Maeshiro Kanto、Shiraishi Misaki、Yasuda Soichiro、Shiozaki Yuta、Kametani Koudai、Du Yukou、Shiraishi Yukihide、Toshima Naoki
    • Journal Title

      Carbon Energy

      Volume: - Issue: 4

    • DOI

      10.1002/cey2.285

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Surfactant-Wrapped n-Type Organic Thermoelectric Carbon Nanotubes for Long-Term Air Stability and Power Characteristics2022

    • Author(s)
      Hata Shinichi、Maeshiro Kanto、Shiraishi Misaki、Du Yukou、Shiraishi Yukihide、Toshima Naoki
    • Journal Title

      ACS Applied Electronic Materials

      Volume: 4 Issue: 3 Pages: 1153-1162

    • DOI

      10.1021/acsaelm.1c01256

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Green Route for Fabrication of Water-Treatable Thermoelectric Generators2022

    • Author(s)
      Hata Shinichi、Shiraishi Misaki、Yasuda Soichiro、Juhasz Gergely、Du Yukou、Shiraishi Yukihide、Toshima Naoki
    • Journal Title

      Energy Material Advances

      Volume: 2022 Pages: 1-12

    • DOI

      10.34133/2022/9854657

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cu-ion-induced n- to p-type switching in organic thermoelectric polyazacycloalkane/carbon nanotubes2022

    • Author(s)
      Hata Shinichi、Nakata Riku、Yasuda Soichiro、Ihara Hiroki、Du Yukou、Shiraishi Yukihide、Toshima Naoki
    • Journal Title

      Materials Advances

      Volume: 3 Issue: 1 Pages: 373-380

    • DOI

      10.1039/d1ma00871d

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Durable n-type carbon nanotubes double-doped with 1,8-diazabicyclo[5.4.0]undec-7-ene and polyamidoamine dendrimers2021

    • Author(s)
      Hata Shinichi、Yamaguchi Yuya、Nakata Riku、Kametani Koudai、Du Yukou、Shiraishi Yukihide、Toshima Naoki
    • Journal Title

      Diamond and Related Materials

      Volume: 120 Pages: 108656-108656

    • DOI

      10.1016/j.diamond.2021.108656

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 金属コロイド/カーボンナノチューブ複合膜の超小集電モジュールへの応用2023

    • Author(s)
      塩﨑祐太・常川 凌・齋藤啓吾・後藤達也・秦 慎一・白石幸英
    • Organizer
      2023年日本化学会西日本大会山口大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超分子とカーボンナノチューブを用いた有機熱電変換材料の開発2023

    • Author(s)
      猪原啓希・中川知佳・後藤達也・秦 慎一・白石幸英
    • Organizer
      2023年日本化学会西日本大会山口大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] デンドリマー保護銀コロイド/カーボンナノチューブ複合膜の熱電変換特性2022

    • Author(s)
      塩﨑祐太・ 郷坪実央・秦 慎一・白石幸英
    • Organizer
      2022年度日本写真学会年次大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 樹状高分子/カーボンナノチューブによるハイブリット熱電材料の創製とモジュール応用2022

    • Author(s)
      白石幸英・塩﨑祐太・猪原啓希・郷坪実央・秦 慎一
    • Organizer
      2022年画像関連学会連合会 第8回合同秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Enhanced Thermoelectric Performance of n-type Carbon Nanotube Sheets in Water System: Conjunctive Effect of Strong Organic Base and Poly(amidoamine) Dendrimer2021

    • Author(s)
      Shinichi Hata, Yuya Yamaguchi, Yukihide Shiraishi, Naoki Toshima
    • Organizer
      he 14th International Conference on New Diamond and Nano Carbons (NDNC) 2020/2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Preparation of Organic and Inorganic Hybrid Thermoelectric Materials Using PEDOT:PSS-Protected Ag Nanoplates2021

    • Author(s)
      Yukihide Shiraishi, Satoshi Hoshino, Yukou Du, Shinichi Hata, Naoki Toshima
    • Organizer
      34nd Conference of European Colloid and Interface Society
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Electron Transport in Carbon Nanotubes Induced by Polyazacycloalkanes: Expression of p-type Characteristics by Cu ions, Organic Thermoelectric Behavior, and Module Output2021

    • Author(s)
      Shinichi Hata, Riku Nakata, Soichiro Yasuda, Hiroki, Ihara, Yukihide Shiraishi, Naoki Toshima
    • Organizer
      31st International Conference on Diamond and Carbon Materials 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ポリシクロデキストリン保護銀ナノ粒子/カーボンナノチューブによる複合熱電変換材料の創製2021

    • Author(s)
      岩本龍之介・ 草田茂吉・秦 慎一・白石幸英
    • Organizer
      2021年度日本写真学会年次大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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