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Creation of Thermoelectric Clathrate Composites by Nanoscale Control of Interfaces and Textures

Research Project

Project/Area Number 17K06841
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Structural/Functional materials
Research InstitutionTokyo University of Science, Yamaguchi

Principal Investigator

Anno Hiroaki  山陽小野田市立山口東京理科大学, 工学部, 教授 (60279106)

Co-Investigator(Kenkyū-buntansha) 岡本 和也  山陽小野田市立山口東京理科大学, 工学部, 助教 (70756113)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords未利用排熱有効利用 / 熱電発電 / クラスレート / ゼーベック係数 / 導電率 / 熱伝導率 / ナノ界面制御 / 界面ポテンシャル / 未利用熱有効利用 / 元素置換 / ナノ界面 / 非平衡グリーン関数法 / シリコン / ナノ化プロセス / 省エネルギー / 半導体 / ナノ材料 / 熱電変換
Outline of Final Research Achievements

In order to accelerate the practical application of thermoelectric power generation technology that directly converts a huge amount of unused waste heat into electric energy toward the transition to an energy-saving and environmentally symbiotic society, we aimed to dramatically improve thermoelectric performance by creating an innovative composite material by controlling the nano-interface/structure of semiconductor clathrate materials, which are expected as thermoelectric element materials in the high temperature region. We obtained useful information about material design from the following two new viewpoints. (1) We succeeded in creating a new clathrate with a modulated host structure and achieved pn control and improved thermoelectric performance in these compounds. (2) We obtained knowledge about the effect of increasing the Seebeck coefficient due to the interfacial potential caused by the introduction of nano-interface/structure.

Academic Significance and Societal Importance of the Research Achievements

省エネルギー・環境共生型社会への転換に向けて、膨大な量の未利用排熱を電気エネルギーに直接変換する熱電発電の実用化の要求が高まっており、本研究は高温領域の熱電材料として有望な半導体クラスレートのナノ界面・構造制御により革新的複合材料を創製し、熱電変換効率の向上に寄与する有益な成果を得た。本研究で対象としたシリコン(Si)系クラスレートは資源量・コスト・環境安全性の応用上の観点からも有利な材料系であり、その性能向上に関する成果は熱電発電の実用化の観点からも意義がある。さらに、ナノ界面・構造の制御による熱電性能の向上に関して新たに得られた知見はナノ材料科学の発展にも寄与するものとして意義がある。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (18 results)

All 2020 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (16 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] 非平衡グリーン関数法を活用した密度汎関数理論によるBa8Au6Si40クラスレートの熱電特性の計算2020

    • Author(s)
      阿武宏明
    • Journal Title

      山陽小野田市立山口東京理科大学紀要

      Volume: 3 Pages: 7-14

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Ba8Cu5GaxGe40-xPクラスレートにおけるGa添加量による熱電特性への影響2020

    • Author(s)
      岡本和也,古賀雄大,阿武宏明
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Calculation of Transport Properties of Nano Silicon Clathrate System on Density Functional Theory and Non-Equilibrium Green’s Function Method2019

    • Author(s)
      Hiroaki Anno and Kazuya Okamoto
    • Organizer
      The 38th International Conference on Thermoelectrics and The 4th Asian Conference on Thermoelectrics (ICT/ACT2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Transport Properties of Silicon Clathrate System with Nano Scale Interface Calculated by Density Functional Theory and Non-Equilibrium Green's Function Method2019

    • Author(s)
      Hiroaki Anno and Kazuya Okamoto
    • Organizer
      13th Pacific Rim Conference of Ceramic Societies (PACRIM13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 密度汎関数理論によるBa8Cu6Ge38P2クラスレートの熱電特性の計算2019

    • Author(s)
      阿武宏明,岡本和也
    • Organizer
      第16回日本熱電学会学術講演会(TSJ2019)
    • Related Report
      2019 Annual Research Report
  • [Presentation] (Cu, Ga)-P同時添加によるBaCuGe系クラスレートの熱電特性への影響2019

    • Author(s)
      岡本和也,阿武宏明
    • Organizer
      第16回日本熱電学会学術講演会(TSJ2019)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 非平衡グリーン関数法によるSiクラスレートの輸送特性の計算2019

    • Author(s)
      阿武宏明,岡本和也
    • Organizer
      2019年第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 表面電位顕微鏡によるシリコン系クラスレートの仕事関数測定2019

    • Author(s)
      岡本 和也,阿武 宏明
    • Organizer
      2019年第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Thermoelectric Properties of Si-Based Clathrates Prepared by Spark Plasma Sintering of Planetary-Ball-Milled Powders2018

    • Author(s)
      Hiroaki Anno, Gensei Miyagawa, Risa Maejima, and Kazuya Okamoto
    • Organizer
      The 37th Annual International and 16th European Conference on Thermoelectrics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 遊星ボールミル法によるSi系クラスレート粉末の焼結体の弾性定数2018

    • Author(s)
      岡本和也,阿武宏明
    • Organizer
      第15 回日本熱電学会学術講演会(TSJ2018)
    • Related Report
      2018 Research-status Report
  • [Presentation] 遊星ボールミル法によるSi系クラスレート粉末の焼結体における熱電特性2018

    • Author(s)
      岡本和也,宮川玄聖,前島理佐,阿武宏明
    • Organizer
      2018年(平成30年)第65回応用物理学会春季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Tuning of Chemical Composition and Thermoelectric Properties for Si-Based Clathrate System by Multi-Element Substitution Including Gold2017

    • Author(s)
      Hiroaki Anno, Risa Maejima and Kazuya Okamoto
    • Organizer
      The 36th International Conference on Thermoelectrics (ICT2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Thermoelectric Properties of Si-Based Multinary Clathrate Systems2017

    • Author(s)
      Hiroaki Anno, Risa Maejima and Kazuya Okamoto
    • Organizer
      The International Union of Materials Research Society-International Conference of Advanced Materials 2017 (IUMRS-ICAM 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effects of Au Substitution on Thermoelectric Properties of Type-I Clathrate Si-Ge Mixed Crystal System2017

    • Author(s)
      Risa Maejima, Kazuya Okamoto and Hiroaki Anno
    • Organizer
      The International Union of Materials Research Society-International Conference of Advanced Materials 2017 (IUMRS-ICAM 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 微細構造を有するシリコン系クラスレート焼結体の作製2017

    • Author(s)
      岡本和也,前島理佐,阿武宏明
    • Organizer
      2017年(平成29年)第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] シリコン系クラスレート多元化合物の高温熱電特性2017

    • Author(s)
      阿武宏明,前島理佐,岡本和也,山本淳
    • Organizer
      第14回日本熱電学会学術講演会(TSJ2017)
    • Related Report
      2017 Research-status Report
  • [Presentation] Auを含む多元素置換Si系クラスレートの弾性定数2017

    • Author(s)
      岡本和也,前島理佐,阿武宏明
    • Organizer
      第14回日本熱電学会学術講演会(TSJ2017)
    • Related Report
      2017 Research-status Report
  • [Book] サーマルデバイス2019

    • Author(s)
      飯田努,塩尻大士,阿武宏明
    • Total Pages
      403
    • Publisher
      株式会社エヌ・ティー・エス
    • Related Report
      2019 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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