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Dense charge storage using anomalous dielectric electric double layer

Research Project

Project/Area Number 18H03924
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
Research InstitutionWaseda University (2021)
The University of Tokyo

Principal Investigator

Okubo Masashi  早稲田大学, 理工学術院, 教授 (20453673)

Co-Investigator(Kenkyū-buntansha) 大谷 実  国立研究開発法人産業技術総合研究所, 材料・化学領域, 研究チーム長 (50334040)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥43,550,000 (Direct Cost: ¥33,500,000、Indirect Cost: ¥10,050,000)
Fiscal Year 2021: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Fiscal Year 2020: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2019: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Fiscal Year 2018: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Keywords蓄電デバイス / 電気化学キャパシタ / 層状化合物 / ナノシート / キャパシタ / 2次元化合物 / 原子層化合物 / 二次電池 / 電池
Outline of Final Research Achievements

Sustainable development for low-carbon society needs electrochemical energy storage devices capable of efficient electricity supply. In this project, we studied charge storage in confined nanospace for the development of high energy density electrochemical supercapacitors. Combined assessment of experiments and computations found that ions and solvent molecules confined in nanospace possess anomalous dielectric response to the external electric field, which enables dense charge storage. Using this anomalous behavior, we successfully demonstrated high energy density charge storage in confined nanospace between transition-metal carbide nanosheets MXenes, which provides technological foundations to achieve electrochemical supercapacitors with higher energy density.

Academic Significance and Societal Importance of the Research Achievements

持続可能な低炭素社会を構築するためには、必要な時に必要なだけの電気を供給できる蓄電デバイスが不可欠である。本研究では、層状の化合物において高密度に電荷を蓄える、すなわち、多くの電気を蓄えるための材料設計指針を見出し、実際、4倍近い電力エネルギーを蓄える電極システムの構築に成功した。この成果は、将来、軽量・小型・安価といった性能を兼ね備えた革新的な蓄電デバイスを生み出す可能性のある基盤技術である。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (16 results)

All 2021 2020 2019 2018 Other

All Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 5 results,  Invited: 6 results) Remarks (1 results)

  • [Journal Article] Optimal water concentration for aqueous Li+ intercalation in vanadyl phosphate2021

    • Author(s)
      Sun Dan、Okubo Masashi、Yamada Atsuo
    • Journal Title

      Chemical Science

      Volume: 12 Issue: 12 Pages: 4450-4454

    • DOI

      10.1039/d0sc04647g

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Capacitive versus Pseudocapacitive Storage in MXene2020

    • Author(s)
      Yasunobu Ando, Masashi Okubo, Atsuo Yamada, Minoru Otani
    • Journal Title

      Adv. Funct. Mater.

      Volume: 30 Issue: 47 Pages: 2000820-2000820

    • DOI

      10.1002/adfm.202000820

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] “Interfacial Dissociation of Contact-Ion-Pair on MXene Electrodes in Concentrated Aqueous Electrolytes2019

    • Author(s)
      Kijae Kim, Masashi Okubo, Atsuo Yamada
    • Journal Title

      J. Electrochem. Soc.

      Volume: 166 Issue: 15 Pages: A3739-A3744

    • DOI

      10.1149/2.0931915jes

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Topochemical synthesis of phase-pure Mo2AlB2 through staging mechanism2019

    • Author(s)
      Kijae Kim, Chi Chen, Daisuke Nishio-Hamane, Masashi Okubo, Atsuo Yamada
    • Journal Title

      Chem. Commun.

      Volume: 55 Issue: 63 Pages: 9295-9298

    • DOI

      10.1039/c9cc03855h

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dense Charge Accumulation in MXene with a Hydrate-Melt Electrolyte2019

    • Author(s)
      Kijae Kim, Yasunobu Ando, Akira Sugahara, Seongjae Ko, Yuki Yamada, Minoru Otani, Masashi Okubo, Atsuo Yamada
    • Journal Title

      Chem. Mater.

      Volume: 31 Issue: 14 Pages: 5190-5196

    • DOI

      10.1021/acs.chemmater.9b01334

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Negative dielectric constant of water confined in nanosheets2019

    • Author(s)
      Akira Sugahara, Yasunobu Ando, Satoshi Kajiyama, Koji Yazawa, Kazuma Gotoh, Minoru Otani, Masashi Okubo & Atsuo Yamada
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1 Pages: 850-850

    • DOI

      10.1038/s41467-019-08789-8

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] MXene as a Charge Storage Host2018

    • Author(s)
      Okubo Masashi、Sugahara Akira、Kajiyama Satoshi、Yamada Atsuo
    • Journal Title

      Accounts of Chemical Research

      Volume: 51 Issue: 3 Pages: 591-599

    • DOI

      10.1021/acs.accounts.7b00481

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Origins and Implications of Interfacial Capacitance Enhancements in C60-Modified Graphene Supercapacitors2018

    • Author(s)
      Cheng Zhan, Tuan Anh Pham, Maira R. Cern, Patrick G. Campbell, Vedasri Vedharathinam, Minoru Otani, De-en Jian, Juergen Biener, Brandon C. Wood, and Monika Biener
    • Journal Title

      ACS Appl. Mater. Interfaces

      Volume: 10 Issue: 43 Pages: 36860-36865

    • DOI

      10.1021/acsami.8b10349

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Design Strategy for reversible oxygen-redox cathodes for rechargeable batteries2021

    • Author(s)
      Masashi Okubo
    • Organizer
      FaMaL Seminar
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Capacitive and Pseudocapacitive Intercalation of Aqueous Ions in Layered Materials (MXene)2020

    • Author(s)
      Masashi Okubo, Atsuo Yamada
    • Organizer
      PRiME2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MXene as a charge storage host2019

    • Author(s)
      Masashi Okubo, Atsuo Yamada,
    • Organizer
      2nd International Conference of MXenes
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Charging MXenes in aqueous electrolytes2019

    • Author(s)
      Masashi Okubo, Atsuo Yamada,
    • Organizer
      International Conference on Advanced Capacitors (ICAC 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Charging MXenes in concentrated aqueous electrolytes2019

    • Author(s)
      Masashi Okubo, Atsuo Yamada,
    • Organizer
      The 10th Asian Conference on Electrochemical Power Sources 2019 (ACEPS-10)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Two-dimensional MXene as a charge storage host2019

    • Author(s)
      M. Okubo, A. Yamada,
    • Organizer
      International Symposium on Graphitic Carbon Materials for Energy Storage
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] High voltage aqueous MXene supercapacitors with a hydrate-melt electrolyte2018

    • Author(s)
      Kijae Kim, Seongjae Ko, Akira Sugahara, Yuki Yamada, Masashi Okubo, Atsuo Yamada
    • Organizer
      International Battery Association 2018 (IBA 2018)
    • Related Report
      2018 Annual Research Report
  • [Remarks] ナノ空間に閉じ込められた水の「負の誘電率」を発見

    • URL

      https://www.t.u-tokyo.ac.jp/foe/press/setnws_201902211318193312985055.html

    • Related Report
      2018 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2023-01-30  

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