Who We Are

About us

Our laboratory, “Structure-Controlled Functional Materials Laboratory”, was launched on October 17, 2016 at Institute for Materials Research, IMR (KINKEN), Tohoku University. This laboratory aims to research and develop novel materials that exhibit new functions by controlling the microstructure of materials, based on study on various phase transformations that is Professor Tetsu Ichitsubo’s life work, with Associate Professor Norihiko L. Okamoto, Assistant Professors Hiroshi Tanimura, Tomoya Kawaguchi, Hongyi Li (Specially Appointed), and Kohei Shimokawa (@FRIS). We are widely conducting development of structure and functional materials including energy materials for innovative batteries. While feeling the large responsibility of taking charge of one laboratory at IMR and keeping in mind the creation of material seeds that industrial society will surely need, we are enjoying the material science towards the goal of material research and development with an eye on the exit. We are working with Secretaries Ms. Noriko Ojima and Ms. Sayaka Kuroki, dealing with various operations of the laboratory. (in JPN) 構造制御機能材料学研究部門は2016年10月17日(発足時:生体材料学研究部門)に東北大学金属材料研究所の一部門として新たにスタートしました.本部門では,市坪が専門とする構造相転移・相変態組織形成学を基軸にし,岡本範彦 准教授,谷村洋 助教,河口智也 助教,李弘毅 特任助教,学際研・下川助教らとともに,材料組織構造を制御することにより新機能を発現する材料を研究開発することを目指します.基盤材料のみならず,革新電池用エネルギー材料の開発にも重点をおきます.金研において一つの部門を担当するという重責を感じつつ,社会が必要とするであろう材料のシーズを生み出すことを念頭に,出口を見据えた材料研究・開発を目標に,マテリアルサイエンスを楽しんでいきたいと思います.そして,事務・技術補佐員の小嶋典子,黒木清夏とともに,研究室の様々な楽しい運営を行っていきたいと思います.【研究室の様子や実験装置などは,RESEARCHES & TECHNIQUESの中のAtmosphere & apparatuses in our laboratoryをご覧ください】

Members of our team

People

Our laboratory is composed of Professor Tetsu Ichitsubo, Associate Professor Norihiko L. Okamoto, Assitant Professors Hiroshi Tanimura, Tomoya Kawaguchi, Hongyi Li (@Specially Appointed), and Kohei Shimokawa (@FRIS). We are also working with Secretaries Ms. Noriko Kojima and Ms. Sayaka Kuroki, dealing with various fun operations of the laboratory.

  • Tetsu Ichitsubo
    教授 市坪 哲

    Professor,
    Head, Collaborative Research Center on Energy Materials (E-IMR)

    Personal web page

    E-IMR web page

  • Norihiko L. Okamoto
    准教授 岡本 範彦

    Associate Professor
    TEM structure analysis
    Thermoelectric materials
    Personal web page

  • Hiroshi Tanimura
    助教 谷村 洋

    Assistant Professor
    Ultrafast measurement of phase-change materials by fs-laser
    Relaxation behavior of photo-excited semiconductor by TR-ARPES

  • Tomoya Kawaguchi
    助教 河口 智也

    Assistant Professor
    Advanced X-ray analysis techniques
    Electrode materials for rechargeable batteries
    Personal web page

  • Hongyi Li
    特任助教 李 弘毅

    Research Assistant Professor
    Dual-cation rechargeable battery
    First-principles calculation for rechargeable battery materials

  • Kohei Shimokawa
    助教 下川 航平(学際研)

    Assistant Professor
    at The Frontier Research Institute for Interdisciplinary Sciences

Research direction towards rational materials design

Researches & Techniques

We aim to research and develop novel materials that exhibit new functions by controlling the microstructure of materials based on the microstructure formation theory, crystal structure theory, statistical thermodynamics, microscopic elastic mechanics, electrochemistry and quantum chemistry, by using X-ray structure/spectroscopy analyses, transmission/scanning electron microscopy, femtosecond laser spectroscopy, electromagnetic resonance ultrasound spectroscopy, etc. Please see "LEARN MORE" below, after selecting each category. (In JPN) 材料組織学、結晶構造学、熱・統計熱力学、微視的弾性力学、電気化学,量子化学などの学問に基づき、X線構造・分光解析,透過・走査電子線顕微鏡、フェムト秒レーザー分光、電磁超音波共鳴法などを用いて、「材料組織・構造を制御することにより新機能を発現する材料開発」を目指します.詳細は,下の各種カテゴリーをクリックで選択し,"LEARN MORE"を押してください.


Development of electrode materials for realizing innovative storage batteries: When carrier ions are inserted and extracted, a phase transition occurs with significant strain, and therefore we have to develop new electrode materials with robust structures that can be stably used even in such a situation, and we also aim to construct a new battery system itself. By controlling microstructures of oxides and alloys at the atomic structure level and further controlling mesoscale microstructure formation, we aim to change the thermodynamic potential and facilitate diffusion of carrier ions.

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Development of high-performance bulk thermoelectric materials: We aim to develop environmentally friendly thermoelectric conversion materials that can directly convert the huge amount of unused energy (of low-temperature wasted heat below 300 degree C) into electric energy.

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Phase transformation studies of structure materials and biomaterials towards their practical applications: We are investigating the transformation modes of Ti-alloys for biomaterials (omega transformation), Ni-based superalloys for power-plants/aeroplanes blades (rafting phenomenon), etc.

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Various phase transitions induced by vibration, light, electric, stress, magnetic fields: Glass structures actually have heterogeneity at various hierarchical levels. By controlling this non-uniform, i.e., inhomogeneous, structure of glasses, we aim to find glasses exhibiting new physical properties. We also focus on the development of phase change materials that switch the bonding features of electronic systems through the lattice-lattice phase transition.

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Eshelby established the basis of the micromechanics theory for isotropic body. Afterward it has been extended for anisotropic cases by other researchers, and has become more sophisticated theory; for example, one can see more systematized theory in Mura’s book (left), and for the textbook written in Japanese, please see the right book that was written by Professors Toshio Mura and Tsutom Mori.

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Advanced measurement techniques and our apparatuses: We introduce the development of new measurement techniques for materials researches. In addition, we show how to utilize the new techniques or apparatuses to what kind of researches in our laboratory.

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We utilize TEM, STEM, etc. owned by Institute for Meterials Research and The Electron microscopy Center.

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Experiments at the synchrotron radiation facilities (SPring-8, SACLA, etc) are described.

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Advanced measurement techniques and our apparatuses: We introduce the development of new measurement techniques for materials researches. In addition, we show how to utilize the new techniques or apparatuses to what kind of researches in our laboratory.

Learn More

We introduce atmosphere of staff/student rooms and apparatuses owned by Ichitsubo laboratory.

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Papers | Presentations | Collaborations are listed here

Achievements


  • Original Papers

    2020

    If not opened with a click, open as a new tab or new window. クリックしても開かないときは新しいタブあるいはウィンドウで開いてください.

    ● Effects of solute oxygen on kinetics of diffusionless isothermal transformation in beta-titanium alloys
    Norihiko L. Okamoto, Shuhei Kasatani, Martin Luckabauer, Masakazu Tane, Tetsu Ichitsubo,
    Scripta Materialia, in press (2020).

    ● Nonthermal Dynamics of Dielectric Functions in a Resonantly Bonded Photoexcited Material,
    Hiroshi Tanimura, Shinji Watanabe, Tetsu Ichitsubo,
    Advanced Functional Materials (Early View) (2020).

    ● Search for vacancies in concentrated solid-solution alloys with fcc crystal structure,
    L. Resch, M. Luckabauer, N. Helthuis, N. L. Okamoto , T. Ichitsubo, R. Enzinger, W. Sprengel, and R. Würschum,
    Physical Review Materials 4, 060601(R) (2020). (Editors’ Suggestion)

    ● Circumventing huge volume strain in alloy anodes of lithium batteries,
    Hongyi Li, Takitaro Yamaguchi, Shingo Matsumoto, Hiroaki Hoshikawa, Toshiaki Kumagai, Norihiko L. Okamoto & Tetsu Ichitsubo,
    Nature Communications 11, 1584 (2020).

    (more…)

    Publication


  • Presentations

    2020

    International Conference (Invited)

    ● (Invited) T. Ichitsubo,
    “Considering elastic strain effects in rechargeable battery electrochemistry”, 21st International Conference on Solid State Ionics (SSI-21), Padova Italy, June 18-23, 2017.

    If not opened, click as a new tab or new window.
    (more…)

    Presentation

  • Collaborations

    詳細は (more) をクリックしてください.開かないときは新しいタブあるいはウィンドウで開いてください.
    (more…)

    Collaborative Researches with companies

Research Highlights

Press release & News

We introduce press releases & news related to our laboratory.

  • PRESS RELEASE:
    Lifetime observation of nonthermal processes in a photoexcited semiconductor
    光励起された半導体の非熱的過程観測~超高速作動光メモリの原理解明に期待~

    @Ultrafast_Phenomenon
  • PRESS RELEASE:
    Succeeded in circumventing huge volume strain due to lithiation of Al anode in Lithium batteries
    リチウム合金化に伴う巨大体積歪の回避に成功

    @Battery/Catalyst
  • PRESS RELEASE:
    Imaging compositional change inside alloy nanoparticle during catalytic reaction
    反応中の合金触媒の多様な組成変化を可視化

    @Battery/Catalyst
  • PRESS RELEASE:
    Discovered new phase transition mode in titanium alloys
    チタン合金の新たな相転移機構の発見

    @Metal/Alloys
  • PRESS RELEASE:
    Discovered the promotion phenomenon of multivalent-ion diffusion caused by concerted motion
    協奏的動きがもたらす多価イオン拡散の促進現象を発見

    @Battery/Catalyst
  • PRESS RELEASE:
    Established the local structure model of amorphous in phase change materials
    アモルファス相変化記録材料の局所構造をモデル化

    @Glass/Amorphous
  • PRESS RELEASE(@Kyoto Univ):
    Mechanism of ultrafast phase change in the materials used for DVD/Blu-ray discs
    DVD/ブルーレイディスク材料合金が超高速で相変化するメカニズム

    @Ultrafast_Phenomenon
  • PRESS RELEASE(@Kyoto Univ):
    Developed long-life, high specific capacity silicon negative electrode for lithium-ion batteries
    長寿命高比容量のリチウムイオン蓄電池負極を開発

    @Battery/Catalyst
What we want to announce to everyone

Blog & Information

新型コロナ:TV番組情報の備忘録メモ

新型コロナが我々を直撃しています.

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東北大BCP2へ (新型コロナ対策)

ようやく研究活動が緩やかに開始できるようになってきます. しかし,,,

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Ongoing projects supported by

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