Consider energy problems!


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. The current goal of our laboratory is to develop not only basic materials but also materials related to energy issues, such as energy materials for innovative batteries, thermoelectric materials, and thermal storage materials. 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. 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(熱電材料,電子顕微鏡),谷村洋 助教(半導体材料,レーザー計測),河口智也 助教(電池材料,放射光測定),李弘毅 特任助教(電気化学,第一原理計算),学際研・下川助教(電気化学)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.現時点における当研究室の目標として,基盤材料のみにとどまらず,革新電池用エネルギー材料,熱電材料,蓄熱材料などのエネルギー問題に関する材料開発に重点をおいています. 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


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

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

    Personal web page

    E-IMR web page



    Scopus ID

  • Norihiko L. Okamoto
    准教授 岡本 範彦

    Associate Professor
    (S)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 (FRIS)
    FRIS web page

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,以下の各種カテゴリーをクリックで選択後〔緑色に〕,茶色の背景の一番下まで行き"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.

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

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Announcements (Lecture, Publication, etc)

Lecture | Paper | Presentation | Collaboration [Swipe to each side]

  • 講義資料は以下のリンクからダウンロードしてください(パスワード必要).
    (注) 開かない場合には,新しいタブで開く,で開いてください.


    東北大学大学院工学研究科 マテリアル・開発系
    材料科学の最前線 第14回資料
    金研夏期講習会 資料

    九州大学 集中講義「相転移の基礎と応用」

    講師: 市坪 哲 (東北大学金属材料研究所・教授)



     相転移は相や構造が外的要因で変化する現象である.すなわち,外的要因である温度変化や磁場・応力場などを印加することにより,材料の新たな構造機能特性を生み出したり,向上させたりすることが可能となる.よって,相転移現象を理解し制御することは,材料科学の領域において学問上・工学上において非常に重要となり,そのためには相転移の基礎となる熱力学・統計熱力学の学問体系および手法のスキームを学ぶことが必要不可欠である. (more…)

    Lecture documents 講義資料

  • Presentations


    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.


  • 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.

    Collaborative Researches with companies

Research Highlights

Papers & Press release

We introduce press releases & news related to our laboratory.

  • Publication list

    Accelerated Kinetics Revealing Metastable Pathways of Magnesiation-Induced Transformations in MnO2 Polymorphs
    ポスト・リチウム蓄電池の開発に前進 マグネシウム蓄電池正極材料開発に向けてMnO₂を使いこなす

    Liquid-sulfur/sulfide composite cathodes toward high-rate magnesium rechargeable batteries

    Strain effect on Pt-Ni catalysts revealed by BCDI
    燃料電池などで使われる酸素還元用合金触媒の 高性能化機構を解明

    Structure design for Mg-battery cathode active materials

    Lifetime observation of nonthermal processes in a photoexcited semiconductor

    Succeeded in circumventing huge volume strain due to lithiation of Al anode in Lithium batteries

    Imaging compositional change inside alloy nanoparticle during catalytic reaction

    Discovered new phase transition mode in titanium alloys

    Discovered the promotion phenomenon of multivalent-ion diffusion caused by concerted motion

    Established the local structure model of amorphous in phase change materials

  • PRESS RELEASE(@Kyoto Univ):
    Mechanism of ultrafast phase change in the materials used for DVD/Blu-ray discs

  • PRESS RELEASE(@Kyoto Univ):
    Developed long-life, high specific capacity silicon negative electrode for lithium-ion batteries

What we want to announce to everyone

Blog & Information


エネルギー・化学・プラントの総合技術誌JETI10月号で「燃料電池などで使われる酸素還元用合金触媒の高性能化機構を解明」という,記事が掲載されました. 関連論文はこちら Nano Letters 21, 5945–5951 (2021).

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