• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study of fast charging/discharging mechanism at room temperature in multivalent ion batteries using carbon nanocomposite

Research Project

Project/Area Number 21K14711
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

Okita Naohisa  東京農工大学, 工学(系)研究科(研究院), 助教 (70846625)

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 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords多価イオン電池 / 正極材料 / カーボン複合体 / 室温動作 / 高速充放電 / ナノ材料 / 固溶体反応 / Dual-salt電解液 / 欠陥・空孔形成
Outline of Research at the Start

Mg、Caをキャリアイオンとする多価イオン電池は、ポストリチウムイオン電池として期待される一方で、室温で高速に充放電させることができない点が課題であった。本研究では、多価イオン電池において室温動作化・高速充放電化に成功したカーボン内包型複合体をモデルに、その要因を明らかにすることで、リチウムイオン二次電池用電極材料を多価イオン電池用電極材料に転換するための材料設計指針を得る。

Outline of Final Research Achievements

Encapsulated iron phosphate/carbon and vanadium phosphate/carbon composites have been successfully synthesized as positive electrodes for magnesium-ion batteries. These batteries can charge and discharge reversibly at room temperature and under ultrafast charge-discharge conditions, with a charge-discharge time of 6 minutes. The research has identified several key factors that enable ultrafast positive electrode reactions for magnesium-ion batteries. These include the nanocrystals, which are highly dispersed and directly embedded in conductive carbon, and a solvation structure that facilitates the approach of magnesium ions to the positive electrode, as seen in a dual-salt electrolyte. The study also revealed that magnesium-ion insertion/extraction of the positive electrodes proceeds reversibly through a solid-solution reaction, unlike lithium-ion insertion/extraction via a two-phase reaction, which is believed to be the reason behind the achievement of ultrafast charge-discharge.

Academic Significance and Societal Importance of the Research Achievements

マグネシウムイオン電池において、困難であった室温動作および高速充放電を達成したカーボン複合体材料をモデルに、その要因を明らかにすることで、高速充放電化のための材料設計・電解液/電極界面設計の指針を得ることが可能となる。本指針はマグネシウムイオン電池やリチウムイオン電池に限らず、カルシウム、亜鉛、アルミニウムなどの様々な多価イオン電池にも展開が可能であり、それらの超高速正極の設計指針や反応挙動の知見を提供するものとして、波及効果は大きいと考えられる。

Report

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

    (11 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results) Presentation (7 results)

  • [Journal Article] Ultralong lifespan of SuperRedox Capacitor using Ti-doped Li3V2(PO4)3 cathode with suppressed vanadium dissolution2024

    • Author(s)
      Harada Yuta、Okita Naohisa、Fukuyama Masahiro、Iwama Etsuro、Naoi Wako、Naoi Katsuhiko
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 12 Issue: 3 Pages: 1703-1713

    • DOI

      10.1039/d3ta06240f

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ultrafast cathode characteristics of a nano-V2(PO4)3 carbon composite for rechargeable magnesium batteries2024

    • Author(s)
      Harada Yuta、Chikaoka Yu、Kasai Marina、Koizumi Kyoya、Iwama Etsuro、Okita Naohisa、Orikasa Yuki、Naoi Wako、Naoi Katsuhiko
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 12 Issue: 4 Pages: 2081-2092

    • DOI

      10.1039/d3ta05912j

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Strategy for Ultrafast Cathode Reaction in Magnesium-Ion Batteries Using BF<sub>4</sub> Anion Based Dual-Salt Electrolyte Systems: A Case Study of FePO<sub>4</sub>2023

    • Author(s)
      Chikaoka Yu、Nakata Naomasa、Fujii Kenta、Sawayama Saki、Ochi Riko、Iwama Etsuro、Okita Naohisa、Harada Yuta、Orikasa Yuki、Naoi Wako、Naoi Katsuhiko
    • Journal Title

      ACS Applied Energy Materials

      Volume: - Issue: 9 Pages: 4657-4670

    • DOI

      10.1021/acsaem.2c04182

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The origin of stability and high Co2+/3+ redox utilization for FePO4-coated LiCo0.90Ti0.05PO4/MWCNT nanocomposites for 5 V class lithium ion batteries2022

    • Author(s)
      Okita Naohisa、Iwama Etsuro、Takami Yusuke、Abo Shingo、Naoi Wako、Rozier Patrick、Simon Patrice、Reid McMahon Thomas Homer、Naoi Katsuhiko
    • Journal Title

      RSC Advances

      Volume: 12 Issue: 40 Pages: 26192-26200

    • DOI

      10.1039/d2ra03144b

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] nano-V2(PO4)3/カーボン複合体のマグネシウムイオン電池正極特性2023

    • Author(s)
      澁澤芽寛,原田雄太, 岩崎裕斗, 稲垣葵, 沖田尚久, 岩間悦郎, 直井和子, 直井勝彦
    • Organizer
      第64回電池討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Li3V2(PO4)3/KB複合体のLi量最適化によるMgイオン電池正極特性の向上2023

    • Author(s)
      岩崎祐人・原田雄太・澁澤芽寛・沖田尚久・岩間悦郎・直井和子・直井勝彦
    • Organizer
      第13回CSJ化学フェスタ2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] マグネシウムイオン電池におけるLi3V2(PO4)3/KBの正極特性2022

    • Author(s)
      笠井麻理菜、原田雄太、澁澤芽寛、沖田尚久、直井和子、直井勝彦
    • Organizer
      第63回電池討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] マグネシウムイオン電池におけるLi3V2(PO4)3/KB複合体の正極特性2022

    • Author(s)
      澁澤芽寛、笠井麻理菜、沖田尚久、直井和子、直井勝彦
    • Organizer
      第12回CSJ化学フェスタ2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Mgイオン二次電池用正極材料FePO4内包カーボン複合体の高速充放電特性2022

    • Author(s)
      沖田 尚久、原田 雄太、小泉 京也、笠井 麻理菜、岩間 悦郎、折笠 有基、直井 和子、直井 勝彦
    • Organizer
      電気化学会第89回大会
    • Related Report
      2021 Research-status Report
  • [Presentation] KB内包型FePO4正極のMgイオン電池への応用2021

    • Author(s)
      小泉 京也、沖田 尚久、笠井 麻理菜、岩間 悦郎、折笠 有基、直井 和子、直井 勝彦
    • Organizer
      第62回電池討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] マグネシウムイオン電池におけるLiFePO4/KB複合体の正極特性2021

    • Author(s)
      笠井 麻理菜、小泉 京也、沖田 尚久、折笠 有基、直井 和子、直井 勝彦
    • Organizer
      第11回CSJ化学フェスタ2021
    • Related Report
      2021 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi