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2022 年度 実績報告書

マルチスケールアプローチによるCoフリースクッテルダイトの熱電変換特性改善

研究課題

研究課題/領域番号 22F22756
配分区分補助金
研究機関芝浦工業大学

研究代表者

Mele Paolo  芝浦工業大学, 工学部, 教授 (70608504)

研究分担者 LATRONICO GIOVANNA  芝浦工業大学, SIT総合研究所, 外国人特別研究員
研究期間 (年度) 2022-11-16 – 2025-03-31
キーワードSkutterudites / doping / filler / SPS / quenching / thermoelectrics
研究実績の概要

An attempt of preparing the double filled skutterudites of composition (Sm,Nd)y(FexNi1-x)4Sb12 was made. Due to the small quantity of fillers, we tried, in collaboration with Genova University, to prepare a precursor Sm0.15Nd0.5Sb0.8 to reduce the error in the amount of rare earths. Unfortunately, after preparing the skutterudites and analyzing it via XRD and SEM, we found out that the precursor was contaminated with Ta, coming from the crucible used for the synthesis. So, waiting for the purchase of some Nd, the fellow successfully prepared three samples of skutterudite doped with Sn: Smy(FexNi1-x)4Sb11.5Sn0.5
The three samples were prepared following the directions of collaborators which have recently studied the crossover of the system: X= 0.45 as n-type semiconductor; X = 0.55 as n-p crossover semiconductor; X = 0.65 as p-type semiconductor.
Samples were then ground, sieved and densified by SPS (500 ℃ for 7 minutes)
Room T Seebeck is promising (about -90 microV/K) and the samples will be sent soon to collaborators at NIMS to measure the thermal conductivity and power factor.

現在までの達成度 (区分)
現在までの達成度 (区分)

3: やや遅れている

理由

Due to a contaminated precursor, the first batch of samples of composition (Sm,Nd)y(FexNi1-x)4Sb12 was not suitable for continuing the investigation.
The fellow started with the dopant approach in the meanwhile preparing the composition Smy(FexNi1-x)4Sb11.5Sn0.5.
The custom made apparatus to measure the power factor in the laboratory is not working properly, so samples are going to be sent to collaborators as soon as possible.

今後の研究の推進方策

The first step for the future work is to measure the thermoelectric properties of the doped samples belonging to the system Smy(FexNi1-x)4Sb11.5Sn0.5. After the characterization of the bulk, the synthesis will be repeated and targets of 1.5 cm of diameter will be densified via SPS to be used as targets for the thin film deposition via PLD.
In the meanwhile, new tentative of synthetizing multi-filled skutterudites will be done. As for the Sn-doped samples, first the bulks will be studied, and then pellets will be used to deposit thin films.
In the end, the addition of carbon-based nanodefects will be tried in the attempt of reducing the thermal conductivity, as reported for some Co-based skutterudites.

  • 研究成果

    (6件)

すべて 2023 2022

すべて 雑誌論文 (3件) (うち国際共著 3件、 査読あり 3件、 オープンアクセス 1件) 学会発表 (3件) (うち招待講演 1件)

  • [雑誌論文] Roadmap on thermoelectricity2023

    • 著者名/発表者名
      C. Artini, G. Pennelli, P. Graziosi, Z. Li, N. Neophytou, C. Melis, L. Colombo, E. Isotta, K. Lohani, P. Scardi, A. Castellero, M. Baricco, M. Palumbo, S. Casassa, L. Maschio, M. Pani, G. Latronico, P. Mele, and 25 more coauthors
    • 雑誌名

      Nanotechnology

      巻: 34 ページ: 292001~292001

    • DOI

      10.1088/1361-6528/acca88

    • 査読あり / オープンアクセス / 国際共著
  • [雑誌論文] Effect of the annealing treatment on structural and transport properties of thermoelectric Sm<sub>y</sub>(Fe<sub>x</sub>Ni<sub>1-x</sub>)4Sb<sub>12</sub> thin films2023

    • 著者名/発表者名
      Latronico Giovanna、Mele Paolo、Sekine Chihiro、Wei Pan Sian、Singh Saurabh、Takeuchi Tsunehiro、Bourges Cedric、Baba Takahiro、Mori Takao、Manfrinetti Pietro、Artini Cristina
    • 雑誌名

      Nanotechnology

      巻: 34 ページ: 115705~115705

    • DOI

      10.1088/1361-6528/aca980

    • 査読あり / 国際共著
  • [雑誌論文] Polymer nanocomposite spectrum down-convertors for UV sensing2022

    • 著者名/発表者名
      Darwish Abdalla M.、Sarkisov Sergey S.、Patel Darayas N.、Wilson Simeon、Jackson Rachel、Moody Nichols、Mele Paolo、Latronico Giovanna、Koplitz Brent
    • 雑誌名

      Proceedings Volume 12229, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVI, 1222902

      巻: 12229 ページ: 1222902

    • DOI

      10.1117/12.2630722

    • 査読あり / 国際共著
  • [学会発表] Thermoelectric thin film devices for localized heat harvesting2023

    • 著者名/発表者名
      Giovanna Latronico, Paolo Mele, Hiroki Shigemune, Motoki Maeda, Kimiyoshi Usami, Kaito Nagai, Cedric Bourges, Takao Mori
    • 学会等名
      Shibaura IT 2nd IRCGE Workshop, Tokyo (Japan)
  • [学会発表] Co-Free Skutterudite Thin Films: Optimization of the Annealing Conditions and Thermoelectric Module Measurements2022

    • 著者名/発表者名
      G. Latronico, P. Mele, C. Artini, Y. Kawamura, C. Sekine, T. Takeuchi, C. Bourges, T. Mori
    • 学会等名
      Muroran Institute of Technology Rare Earth Workshop 2022 (REWS2022), Muroran (Japan)
    • 招待講演
  • [学会発表] Developing of a Printed Thin-Film Thermoelectric Device on a Paper Substrate2022

    • 著者名/発表者名
      Giovanna Latronico, Hiroki Shigemune, Motoki Maeda, Cedric Bourges, Takao Mori, Paolo Mele
    • 学会等名
      International Conference on Organic and Hybrid Thermoelectrics (ICOT2022), Kitakyushu (Japan)

URL: 

公開日: 2023-12-25  

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