Materials Science and Engineering
Laboratory name
Energy Materials Laboratory   
Laboratory staff
Tsunehiro Takeuchi （Professor） 　 Masaharu Matsunami （Associate Professor） 　 Keisuke Hirata （Assistant Professor） 　 ANG, Artoni Kevin Roquero （Commissioned Researcher） 　 DIVAKARAN, Anoop M. （Post Doctoral Fellow） 　 YADAV, Kavita （Post Doctoral Fellow） 　 Kentaro Kuga （Commissioned Researcher） CHANDRASEKAR Prasana Suresh （Post Doctoral Fellow） 　
Laboratory title
Development of functional materials contributing the construction of low-energy-consuming, sustainable, carbon neutral society
Laboratory overview
By precisely analyzing energy, momentum, spin polarization, and lattice vibrations using various experimental techniques and theoretical calculations, we aim to develop functional materials capable of being contributing the construction of low-energy-consuming, sustainable, carbon neutral society.
Main research themes
・Development of environmentally friendly thermoelectric materials
・Development of heat flow managing materials and devices
・Electronic structure and electron transport properties of high-Tc superconductors
・Electronic properties of strong electron correlation systems
Individual research theme

  • Development of high performance thermal diodes and heat flowswitching devices

    竹内　恒博

    2017

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    Outcome：

    2023
    By employing electric double layer type capacitor structure, we succeeded in developing a heat flow switching device capable of instantly changing heat flow within a second. The switching ratio Jq1/Jq2 exceeded 2.5.

    2022
    We found that a strong magneto-thermalconductivivty effect was observable for Ag2Te to be used in heat switching devices.

    2022
    We revealed that the lattice thermal conductivity was significantly reduced by anharmonic lattice vibrations and band edge effect in electronic thermal conductivity in Ag2S1-xSex (0≤ x≤ 0.6).

  • Development of high performance thermoelectric materials based on heavy fermion systems

    松波　雅治, 竹内　恒博

    2017

  • Study for electronic structure near Fermi level in valence fluctuating quasicrystals

    松波　雅治, 竹内　恒博

    2017 - 2019

  • Development of Bulk Thermoelectric Materials Possessing ZT > 3.0

    竹内　恒博

    2022

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    Outcome：

    2023
    The problem about oxidization were eliminated by employing oxygen getter material during the sintering process, and the SI-Ge nano-bulk thermoelectric materials possessing dimensions figure of merit ZT > 5.0 was successfully developed.

    2022
    Electronic structure of silver chalcogenides investigated by hard x-ray photoemission spectroscopy and density functional theory calculations