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Challenge to improve the efficiency of a droplet-based electricity generator by controlling the surface and interface and its application to solar cells that generate electricity even in the rain

Research Project

Project/Area Number 22K18807
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionNagoya University

Principal Investigator

Usami Noritaka  名古屋大学, 工学研究科, 教授 (20262107)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords水滴発電 / 太陽電池 / 雨滴発電 / 表面界面制御 / ナノ構造
Outline of Research at the Start

本研究では、脱炭素社会の早期実現に向け、さらなる大規模導入が期待される太陽光発電と、地球に豊富に存在する水や雨からエネルギーを高効率に収集する雨滴発電デバイスを融合することを目指す。摩擦帯電膜のナノ構造化や表面・界面の化学状態制御により雨滴発電デバイスの高効率化指針を明確化するとともに、雨滴発電デバイスを実装した雨天時にも発電する太陽光発電モジュールの実現に挑戦する。

Outline of Final Research Achievements

We aimed to clarify the guidelines for improving the efficiency of droplet-based electricity generators and to demonstrate the operation of solar modules capable of generating electricity even in the rain. We showed the effectiveness of increasing the surface area by processing the substrate surface, using high surface charge density amorphous fluororesin, composites with ferroelectric nanoparticles, and reducing parasitic capacitance by improving electrode shape to enhance the performance of droplet-based electricity generators. By covering the surface electrodes with a protective film, we demonstrated both long-term reliability and the ability to generate electricity even without direct contact between water droplets and electrodes. Furthermore, we successfully demonstrated the capability of generating electricity from both water droplets and sunlight by installing droplet-based electricity generators fabricated on a glass substrate on top of solar cells.

Academic Significance and Societal Importance of the Research Achievements

本研究では、水滴発電デバイスの高性能化研究を進め、得られたデバイスと太陽電池と融合することにより雨でも発電可能な太陽電池の動作を実証した。デバイスの動作原理の理解に基づき、材料選択、構造や形状パラメータの決定指針などを明確化したに学術的意義がある。また、雨でも発電できる太陽電池が実現できれば、天候の影響を緩和して電力を供給することができるため、新たな市場開拓や再生可能エネルギーの利用拡大に貢献できる。これは、地球温暖化や環境汚染などの問題に対処するための重要な一歩といえ、その社会的意義は大きい。

Report

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

    (8 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Core-shell yarn-structured triboelectric nanogenerator for harvesting both waterdrop and biomechanics energies2024

    • Author(s)
      Wang Haitao、Kurokawa Yasuyoshi、Zhang Jia-Han、Gotoh Kazuhiro、Liu Xin、Miyamoto Satoru、Usami Noritaka
    • Journal Title

      Applied Physics Express

      Volume: 17 Issue: 1 Pages: 0170051-6

    • DOI

      10.35848/1882-0786/ad1f06

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Free‐Standing Electrode and Fixed Surface Tiny Electrode Implemented Triboelectric Nanogenerator with High Instantaneous Current2023

    • Author(s)
      Wang Haitao、Kurokawa Yasuyoshi、Wang Jia、Cai Wentao、Zhang Jia‐Han、Kato Shinya、Usami Noritaka
    • Journal Title

      Small

      Volume: 12 Issue: 18 Pages: 23085311-9

    • DOI

      10.1002/smll.202308531

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Performance enhancement of droplet-based electricity generator using a CYTOP intermediate layer2022

    • Author(s)
      Haitao Wang, Yasuyoshi Kurokawa, Kazuhiro Gotoh, Shinya Kato, Shigeru Yamada, Takashi Itoh and Noritaka Usami
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SC Pages: SC1032-SC1032

    • DOI

      10.35848/1347-4065/acaca7

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] CYTOP/BaTiO3ナノ粒子複合膜を用いた薄膜系直流水滴発電デバイス2024

    • Author(s)
      王 海涛, 黒川 康良, 王 嘉, 宇佐美 徳隆
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mover Electrode/Stater with Double Electrodes Triboelectric Nanogenerator with High Instantaneous Current Triggered by a Surficial Contact Electrode2023

    • Author(s)
      H. Wang, Y. Kurokawa, K. Gotoh, S. Kato, J. Zhang and N. Usami
    • Organizer
      MRS Spring Meeting & Exhibit
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 表面接触電極デザインに基づき開発された高電流出力を持つ新たな摩擦発電機2023

    • Author(s)
      王 海涛, 黒川 康良, 宇佐美 徳隆
    • Organizer
      第10回 応用物理学会名大SC 東海地区学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Boosting the output of droplet-based energy harvester by a CYTOP intermediate layer2022

    • Author(s)
      Haitao Wang, Yasuyoshi Kurokawa, Kazuhiro Gotoh, Satoru Miyamoto, Shinya Kato, Shigeru Yamada, Takashi Itoh, Noritaka Usami
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Performance enhancement of droplet-based electricity generator using a CYTOP intermediate layer2022

    • Author(s)
      Haitao Wang, Yasuyoshi Kurokawa, Kazuhiro Gotoh, Satoru Miyamoto, Shinya Kato, Shigeru Yamada, Takashi Itoh, Noritaka Usami
    • Organizer
      2022 International Conference on Solid State Devices and Materials
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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

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