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Synthesis of Vertical Graphene and Its Application to Flexible Thin-Film Batteries

Research Project

Project/Area Number 22K18802
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 InstitutionUniversity of Tsukuba

Principal Investigator

Toko Kaoru  筑波大学, 数理物質系, 准教授 (30611280)

Project Period (FY) 2022-06-30 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2024: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords二次電池 / グラフェン
Outline of Research at the Start

本研究は、軽くてやわらかい次世代型二次電池「フレキシブル全固体薄膜電池」を提案するとともに、その負極となるグラファイト膜(多層グラフェン)の低温合成技術を構築する。グラフェンの配向性を制御した「バーティカル・グラフェン構造」を検討し、リチウムイオンのインターカレーション(挿入・脱離)サイトを飛躍的に増大させることで、低温合成膜でありながら優れた負極性能を得ることを目的とする。

Outline of Final Research Achievements

This study proposes a next-generation lightweight and flexible secondary battery, the flexible all-solid-state thin-film battery, and aims to overcome the key bottleneck--namely, the anode--through the development of an innovative structure and the establishment of a new theoretical framework. Specifically, the research targets the formation of a vertical graphene structure, in which Li-ion conduction occurs perpendicular to the film plane. As a result, it was discovered that vertical graphene can be self-organized through the appropriate selection of underlying materials during the layer-exchange synthesis of multilayer graphene. Furthermore, it was demonstrated that this vertically aligned structure exhibits significantly higher charge-discharge performance compared to conventional multilayer graphene aligned parallel to the substrate.

Academic Significance and Societal Importance of the Research Achievements

本研究では、多層グラフェン層の配向を制御する独自技術を基軸とし、Liイオンが膜面に垂直に移動できる革新的な「バーティカル・グラフェン負極」を創出した。これにより、従来困難であった高速充放電と柔軟性を両立する全固体薄膜電池の実現に道を拓いた。構造制御と電池特性の相関を体系化する研究は始まったばかりだが、材料科学の新たな学理構築に貢献するとともに、ウェアラブル機器やIoTデバイスに適した次世代電源として社会実装が期待される。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (32 results)

All 2025 2024 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (28 results) (of which Int'l Joint Research: 7 results,  Invited: 10 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Effects of annealing conditions on the battery anode properties of multilayer graphene due to layer exchange2025

    • Author(s)
      Ito R.、Nozawa K.、Saitoh N.、Yoshizawa N.、Suemasu T.、Toko K.
    • Journal Title

      Energy Advances

      Volume: 4 Issue: 2 Pages: 239-243

    • DOI

      10.1039/d4ya00505h

    • Related Report
      2024 Annual Research Report
    • Open Access
  • [Journal Article] Multilayer Graphene Strips on Insulators Formed by Layer Exchange for Applications as Interconnects2024

    • Author(s)
      Murata Hiromasa、Ishiyama Takamitsu、Murakami Katsuhisa、Nagao Masayoshi、Toko Kaoru
    • Journal Title

      ACS Applied Nano Materials

      Volume: 7 Issue: 18 Pages: 22329-22333

    • DOI

      10.1021/acsanm.4c04902

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thickness Dependency of Battery Anode Properties in Multilayer Graphene2023

    • Author(s)
      T. Suzuki, H. Murata, Y. Kado, T. Ishiyama, N. Saitoh, N. Yoshizawa, T. Suemasu, and K. Toko
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 14 Issue: 49 Pages: 54670-54670

    • DOI

      10.1021/acsami.2c14152

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Si薄膜の基板密着性制御によるLiイオン電池負極特性の向上2025

    • Author(s)
      江藤葉, 野沢公暉, 伊藤 玲音, 末益崇, 都甲薫
    • Organizer
      電気化学会第92回大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 金属基板選択がSi薄膜のLiイオン電池負極特性に及ぼす影響2025

    • Author(s)
      江藤葉, 野沢公暉, 伊藤 玲音, 末益崇, 都甲薫
    • Organizer
      日本金属学会2025年春期(第176回)講演大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 機械学習による顕微鏡画像の解析:太陽電池開発への応用2024

    • Author(s)
      都甲 薫
    • Organizer
      日本学術振興会DXプラズマプロセス研究会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 無機半導体材料を用いたフレキシブル熱電素子2024

    • Author(s)
      都甲 薫
    • Organizer
      エネルギーハーベスティングコンソーシアム
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 多結晶半導体薄膜におけるキャリア移動度向上2024

    • Author(s)
      都甲 薫
    • Organizer
      応用物理学会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 半導体ゲルマニウムデバイス―世界最高性能を引き出す薄膜合成技術―2024

    • Author(s)
      都甲 薫
    • Organizer
      JST新技術説明会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] IV族材料の多結晶薄膜合成とエネルギーデバイス応用2024

    • Author(s)
      都甲 薫
    • Organizer
      電子情報通信学会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Low-temperature synthesis of Group IV semiconductor thin films for flexible electronics2024

    • Author(s)
      K. Toko
    • Organizer
      Baja-Tsukuba Collaborative Seminar on Semiconductors and Artificial Intelligence
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The Effect of Metal Doping on the Anode Characteristics of Ge Thin Films in Lithium-ion Secondary Batteries2024

    • Author(s)
      Koki Nozawa, Takashi Suemasu, Kaoru Toko
    • Organizer
      MRS2024 Fall meeting
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Significant improvement of Li-ion battery anode properties of Si thin films by preparing interlayer2024

    • Author(s)
      Yo Eto, Koki Nozawa, Reno Ito, Takashi Suemasu, Kaoru Toko
    • Organizer
      2024 International Conference on Solid State Devices and Materials
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 多層グラフェンの層交換における合成温度の低温化と負極特性の向上2024

    • Author(s)
      伊藤 玲音, 野沢 公暉, 末益 崇, 都甲 薫
    • Organizer
      第15回半導体材料・デバイスフォーラム
    • Related Report
      2024 Annual Research Report
  • [Presentation] 金属基板選択によるSi薄膜のLiイオン電池負極特性の向上2024

    • Author(s)
      江藤葉, 野沢公暉, 末益崇, 都甲薫
    • Organizer
      第15回半導体材料・デバイスフォーラム
    • Related Report
      2024 Annual Research Report
  • [Presentation] Si薄膜の二次電池負極応用 -界面層挿入による特性向上-2024

    • Author(s)
      江藤葉, 野沢公暉, 伊藤 玲音, 末益崇, 都甲薫
    • Organizer
      第85回応用物理学会秋季学術講演会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 多層グラフェンの低温層交換合成と二次電池負極特性2024

    • Author(s)
      伊藤 玲音, 野沢 公暉, 末益 崇, 都甲 薫
    • Organizer
      電気化学会第91回大会
    • Related Report
      2023 Research-status Report
  • [Presentation] Ge薄膜のリチウムイオン二次電池負極特性における異種元素添加効果2024

    • Author(s)
      野沢 公暉, 末益 崇, 都甲 薫
    • Organizer
      電気化学会第91回大会
    • Related Report
      2023 Research-status Report
  • [Presentation] Si薄膜のリチウムイオン電池負極特性における界面層挿入効果2024

    • Author(s)
      江藤 葉, 野沢 公暉, 伊藤 玲音, 末益 崇, 都甲 薫
    • Organizer
      電気化学会第91回大会
    • Related Report
      2023 Research-status Report
  • [Presentation] High-quality Multilayer Graphene Formed by Layer Exchange with Alloy Catalysts2023

    • Author(s)
      R. Ito, T. Suemasu, and K. Toko
    • Organizer
      2023 International Conference on Solid State Devices and Materials (SSDM2023)
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] 層交換による多層グラフェン二次電池負極構造の自己組織的低温形成2023

    • Author(s)
      伊藤 玲音, 末益 崇, 都甲 薫
    • Organizer
      第50回炭素材料学会年会
    • Related Report
      2023 Research-status Report
  • [Presentation] Application of III-V Compound Semiconductors to Lithium-Ion Batteries Using Machine Learning2023

    • Author(s)
      野沢 公暉, 石山 隆光, 西田 竹志, 末益 崇, 都甲 薫
    • Organizer
      第42回電子材料シンポジウム
    • Related Report
      2023 Research-status Report
  • [Presentation] 半導体薄膜の低温結晶化プロセスとデバイス応用2023

    • Author(s)
      都甲 薫
    • Organizer
      東京大学マテリアル工学セミナー
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] 次世代電子デバイスに向けた高機能半導体薄膜の開発2023

    • Author(s)
      都甲 薫
    • Organizer
      会いに行ける科学者フェス
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] 多層グラフェンの層交換成長における合金触媒効果2023

    • Author(s)
      伊藤 玲音, 鈴木 大成, 末益 崇, 都甲 薫
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 多層グラフェンの金属誘起低温成?と高性能負極実証2022

    • Author(s)
      鈴木大成, 末益崇, 都甲薫
    • Organizer
      第13回半導体材料・デバイスフォーラム
    • Related Report
      2022 Research-status Report
  • [Presentation] 層交換多層ク?ラフェンの膜厚変調による負極性能の考察2022

    • Author(s)
      鈴木大成, 加登裕也, 末益崇, 都甲薫
    • Organizer
      第59回炭素材料夏季セミナー
    • Related Report
      2022 Research-status Report
  • [Presentation] Lithium-ion Battery Anode Operation of Multilayer Graphene Formed by Low-temperature Layer Exchange2022

    • Author(s)
      Taisei Suzuki, Takashi Suemasu and Kaoru Toko
    • Organizer
      The 22nd International Vacuum Congress
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of Layer Exchange Conditions o, f Multilayer Graphene on Anode Properties in Li-ion Batteries2022

    • Author(s)
      Taisei Suzuki, Takashi Suemasu and Kaoru Toko
    • Organizer
      The 6th Asia-Pacific Conference on Semiconducting Silicides and Related Materials
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Layer exchange of group IV materials: crystal growth and device applications2022

    • Author(s)
      K. Toko
    • Organizer
      International Conference on Solid State Devices and Materials (SSDM)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 半導体のリチウムイオン電池応用2022

    • Author(s)
      都甲 薫
    • Organizer
      第28回 電子デバイス界面テクノロジー研究会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Patent(Industrial Property Rights)] 電極、電池2024

    • Inventor(s)
      [1] 野沢公暉,都甲薫
    • Industrial Property Rights Holder
      [1] 野沢公暉,都甲薫
    • Industrial Property Rights Type
      特許
    • Filing Date
      2024
    • Related Report
      2024 Annual Research Report

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Published: 2022-07-05   Modified: 2026-01-16  

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