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Experimental tuning of 2D heat conduction and thermoelectric conversion based on shape control

Research Project

Project/Area Number 18K13704
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionKyushu University

Principal Investigator

Li Qin-Yi  九州大学, 工学研究院, 助教 (60792041)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsナノスケール伝熱 / グラフェン / 熱伝導率 / 導電率 / ゼーベック係数 / 熱電性能指数 / 形状制御 / ナノ構造 / 熱電性能 / フォノン / graphene nanoribbons / thermal conductivity / electrical conductivity / Seebeck coefficient / figure of merit / 2D materials / size effect / 熱伝導 / 熱電特性 / 2次元 / 実験研究
Outline of Final Research Achievements

In this project, we designed a one-process approach for fabricating shape-tunable, high-quality graphene along with a new test device, which allows for simultaneous precise measurements of the thermal conductivity, electrical conductivity, and Seebeck coefficient. By adjusting the sample length and width, we measured largely reduced thermal conductivity and enhanced Seebeck coefficient while keeping high electrical conductivity. As a result, we obtained record-high thermoelectric figure of merit of graphene that is 2-4 orders of magnitude higher as compared to literature reports. The mechanisms behind the shape-tunable properties were clearly revealed by our physical simulations of quasi-particles.

Academic Significance and Societal Importance of the Research Achievements

非毒性かつ柔軟な2次元熱電材料は超スマートIoT社会のフレキシブルデバイスの電力供給源として注目されているが、熱電変換の効率はまだ非常に低いため大規模な展開は厳しく制限されている。本研究ではグラフェンの熱電性能指数を2~4桁向上させて、グラフェンが有望な柔軟熱電材料であることを示した。更に、2次元材料の熱と電気特性を前例のないレベルの別々にチューニングすることを実現して、熱科学の基礎研究に貢献できた。

Report

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

    (27 results)

All 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 9 results) Presentation (15 results) (of which Int'l Joint Research: 10 results,  Invited: 4 results) Remarks (1 results)

  • [Int'l Joint Research] パデュー大学(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] パデュー大学(米国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Enhanced Thermoelectric Performance of As-Grown Suspended Graphene Nanoribbons2019

    • Author(s)
      Q.-Y. Li, T. Feng, W. Okita, Y. Komori, H. Suzuki, T. Kato, T. Kaneko, T. Ikuta, X. Ruan, K. Takahashi
    • Journal Title

      ACS Nano

      Volume: 13 Issue: 8 Pages: 9182-9189

    • DOI

      10.1021/acsnano.9b03521

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Modification of thermal transport in an individual carbon nanofiber by focused ion beam irradiation2019

    • Author(s)
      Narasaki Masahiro、Li Qin-Yi、Ikuta Tatsuya、Miyawaki Jin、Takahashi Koji
    • Journal Title

      Carbon

      Volume: 153 Pages: 539-544

    • DOI

      10.1016/j.carbon.2019.07.056

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Water Confined in Hydrophobic Cup-Stacked Carbon Nanotubes beyond Surface-Tension Dominance2019

    • Author(s)
      Li Qin-Yi、Matsushita Ryo、Tomo Yoko、Ikuta Tatsuya、Takahashi Koji
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 10 Issue: 13 Pages: 3744-3749

    • DOI

      10.1021/acs.jpclett.9b00718

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Laser Flash Raman Spectroscopy Method for Characterizing the Specific Heat of a Single Nanoparticle2019

    • Author(s)
      Fan Aoran、Li Qinyi、Ma Weigang、Zhang Xing
    • Journal Title

      Journal of Nanoscience and Nanotechnology

      Volume: 19 Issue: 11 Pages: 7004-7013

    • DOI

      10.1166/jnn.2019.16626

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Frequency-domain Raman method to measure thermal diffusivity of one-dimensional microfibers and nanowires2019

    • Author(s)
      Li, Qin-Yi; Takahashi, Koji; Zhang, Xing;
    • Journal Title

      International Journal of Heat and Mass Transfer

      Volume: 134 Pages: 539-546

    • DOI

      10.1016/j.ijheatmasstransfer.2019.01.057

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Measurement of thermal contact resistance between individual carbon fibers using a laser-flash Raman mapping method2019

    • Author(s)
      Li, Qin-Yi; Katakami, Koki; Ikuta, Tatsuya; Kohno, Masamichi; Zhang, Xing; Takahashi, Koji;
    • Journal Title

      Carbon

      Volume: 141 Pages: 92-98

    • DOI

      10.1016/j.carbon.2018.09.034

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Unexpected Homogeneous Bubble Nucleation near a SolidィCLiquid Interface2018

    • Author(s)
      Tomo, Yoko; Li, Qin-Yi; Ikuta, Tatsuya; Takata, Yasuyuki; Takahashi, Koji;
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 122 Issue: 50 Pages: 28712-28716

    • DOI

      10.1021/acs.jpcc.8b09200

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Variable-spot-size laser-flash Raman method to measure in-plane and interfacial thermal properties of 2D van der Waals heterostructures2018

    • Author(s)
      Li, Qin-Yi; Zhang, Xing; Takahashi, Koji;
    • Journal Title

      International Journal of Heat and Mass Transfer

      Volume: 125 Pages: 1230-1239

    • DOI

      10.1016/j.ijheatmasstransfer.2018.05.011

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Joule heating and laser flash tip-enhanced Raman spectroscopy method for characterizing the specific heat of a single nanoparticle2018

    • Author(s)
      Fan, Aoran; Li, Qinyi; Ma, Weigang; Zhang, Xing;
    • Journal Title

      Chinese Science Bulletin

      Volume: 63 Issue: 27 Pages: 2896-2903

    • DOI

      10.1360/n972018-00294

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Enhancing thermoelectric efficiency of graphene via nanostructuring2019

    • Author(s)
      Li Qin-Yi
    • Organizer
      2nd Workshop on Thermal and Charge Transport across Flexible Nano-Interfaces (TCTFN2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Record-high thermoelectric efficiency of graphene nanoribbons2019

    • Author(s)
      Li Qin-Yi
    • Organizer
      2nd International Symposium on Measurement Technology in Thermal Science and Engineering (MTTSE2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Probing Interface Effect on Heat Conduction in Nanomaterials2019

    • Author(s)
      Li Qin-Yi
    • Organizer
      International Joint Seminar on Mechanical Engineering 2019 at Kyutech
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Record-high thermoelectric performance of graphene2019

    • Author(s)
      Li Qin-Yi, Kato Toshiaki, Ruan Xiulin, Takahashi Koji
    • Organizer
      The 12th Asian Thermophysical Properties Conference (ATPC2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Record-high thermoelectric performance of as-grown graphene nanoribbons2019

    • Author(s)
      Li Qin-Yi, Kato Toshiaki, Ruan Xiulin, Takahashi Koji
    • Organizer
      16th UK Heat Transfer Conference (UKHTC2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Enhanced thermoelectric performance of suspended graphene nanoribbons2019

    • Author(s)
      Li Qin-Yi, Ruan Xiulin, Takahashi Koji
    • Organizer
      ASME (American Society of Mechanical Engineers) 6th Micro/Nanoscale Heat and Mass Transfer International Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] グラフェンの記録的な高い熱電性能2019

    • Author(s)
      Li Qin-Yi, Kato Toshiaki, Ruan Xiulin, Takahashi Koji
    • Organizer
      第3回フォノンエンジニアリング研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] グラフェンリボンの熱伝導計測及びサイズ効果2019

    • Author(s)
      李 秦宜, 高橋 厚史
    • Organizer
      第56回伝熱シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Measurement of thermal contact resistance between individual carbon fibers using a transient Raman mapping method2019

    • Author(s)
      Li Qin-Yi, Katakami Koki, Ikuta Tatsuya, Kohno Masamichi, Zhang Xing, Takahashi Koji
    • Organizer
      The 7th International Symposium on Micro and Nano Technology (ISMNT-7)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermophysical property measurements of two-dimensional sheets and ribbons2019

    • Author(s)
      Qin-Yi Li
    • Organizer
      Sendai “Plasma Forum”
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Extraordinary electronic contribution to thermal transport in free-standing graphene nanoribbons with low-disorder edges2018

    • Author(s)
      Qin-Yi Li
    • Organizer
      Nanoscale and Microscale Heat Transfer VI-Eurotherm Seminar No 111
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Heater assisted Raman method to measure interfacial thermal conductance in van der Waals heterostructures2018

    • Author(s)
      Qin-Yi Li
    • Organizer
      16th International Heat Transfer Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Frequency-domain Raman Optothermal Method to Measure Thermal and Optical Properties of 2D Materials and Heterostructures2018

    • Author(s)
      Qin-Yi Li
    • Organizer
      19th International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 非定常ラマン光熱法とその応用2018

    • Author(s)
      李秦宜
    • Organizer
      第39回日本熱物性シンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] 2次元材料とヘテロ構造の熱物性を計測する周波数領域ラマン分光法の開発2018

    • Author(s)
      李秦宜
    • Organizer
      第55回日本伝熱シンポジウム
    • Related Report
      2018 Research-status Report
  • [Remarks]

    • URL

      https://www.kyushu-u.ac.jp/en/researches/view/137

    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2021-02-19  

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