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2023 Fiscal Year Research-status Report

Thermoelectric conversion improvement of Co-free skutterudites through a multiscale approach

Research Project

Project/Area Number 22KF0336
Allocation TypeMulti-year Fund
Research InstitutionShibaura Institute of Technology

Principal Investigator

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

Co-Investigator(Kenkyū-buntansha) LATRONICO GIOVANNA  芝浦工業大学, SIT総合研究所, 外国人特別研究員
Project Period (FY) 2023-03-08 – 2025-03-31
KeywordsSkutterudites / Doping / Filler / SPS / Quenching / thermoelectrics / thin films
Outline of Annual Research Achievements

Three samples of skutterudite doped with Sn: Smy(FexNi1-x)4Sb11.5Sn0.5 were prepared with X= 0.45 (n-type semiconductor); X = 0.55 (n-p crossover semiconductor); X = 0.65 (p-type semiconductor). After grinding, sieving, and densification with SPS (500 ℃ for 7 minutes) the samples were sent to a collaborator at NIMS Tsukuba for the transport and thermoelectric characterization. Best samples presented an absolute value of Seebeck coefficient of 100 microV/K, a room temperature thermal conductivity of
1 W/m K, an electrical conductivity of 1000 S/cm and a max power factor of 1700 microW/m K^2 at 550K. These results will be summarized and submitted to an international peer-reviewed journal at the earliest convenience.
The double filled skutterudites of composition (Sm,Nd)y(FexNi1-x)4Sb12 and (Sm,La)y(FexNi1-x)4Sb12 were prepared in collaboration with the research group at University of Genoa and will be subjected to structural investigation by XRD before the densification and thermoelectric characterization. The addition of carbon-based nanodefects to Smy(FexNi1-x)4Sb12 skutterudites in the attempt of reducing the thermal conductivity was accomplished and a series of samples with increasing content of carbon was sent to collaborators at TTI (Nagoya) for SPS densification and thermoelectric characterization.
The fellow visited Dillard University (New Orleans, USA) for 1 month to prepare skutterudite thin films added with carbon nanoparticles

Current Status of Research Progress
Current Status of Research Progress

3: Progress in research has been slightly delayed.

Reason

The synthesis of carbon-added Smy(FexNi1-x)4Sb12 bulk skutterudites was unexpectedly difficult due to the high reactivity of nanocarbon particles.
The custom made apparatus to measure the power factor in the laboratory is not working properly, so samples have to be sent to collaborators.
At Dillard University due to time constraints it was just possible to calibrate the multi-target, multi-laser PLD system.

Strategy for Future Research Activity

Future work will be focused to prepare the films of Smy(FexNi1-x)4Sb11.5Sn0.5 and of double-filled skutterudites using the SPS targets. In addition, bulk and thin-film modules of selected n- type and p-type skutterudites will be fabricated and their output power will be evaluated. The preparation of nanocomposite carbon-skutterudite thin films in collaboration with Dillard University will continue.

  • Research Products

    (8 results)

All 2024 2023

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Polymer nanocomposite for protecting photovoltaic cells from solar ultraviolet in space2024

    • Author(s)
      Darwish Abdalla M.、Sarkisov Sergey S.、Graycol Brandon、Hribljan Anja、Patel Darayas N.、Fedoseyev Alex、Hui David、Mele Paolo、Latronico Giovanna、Cho Kyu、Giri Anit、Koplitz Brent
    • Journal Title

      Nanotechnology Reviews

      Volume: 13 Pages: 1-23

    • DOI

      10.1515/ntrev-2024-0013

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fe(Se,Te) Thin Films Deposited through Pulsed Laser Ablation from Spark Plasma Sintered Targets2024

    • Author(s)
      Michela Iebole, Valeria Braccini, Cristina Bernini, Andrea Malagoli, Nicola Manca, Alberto Martinelli, Matteo Cialone, Marina Putti, Shiv J. Singh, Giovanna Latronico and Paolo Mele
    • Journal Title

      Materials

      Volume: 1 Pages: 1-10

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A 200mV Operable On-Chip Temperature Sensor for IoT Devices Powered by Energy Harvesters with Ultra-Low Output Voltage2023

    • Author(s)
      Usami Kimiyoshi、Wang Songxiang、Nagai Kaito、Latronico Giovanna、Mele Paolo
    • Journal Title

      IEEE

      Volume: 1 Pages: 65-71

    • DOI

      10.1109/IoTaIS60147.2023.10346043

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Effect of the Sn-doping on skutterudites belonging to the system Smy(FexNi1-x)4Sb122023

    • Author(s)
      Giovanna Latronico, Paolo Mele et al
    • Organizer
      Advanced Materials Research Grand Meeting - MRM2023/IUMRS-ICA2023 Kyoto
    • Int'l Joint Research
  • [Presentation] Investigation of the Influence of the Sn-Doping on the Structure and Thermoelectric Properties of Co-free Skutterudites2023

    • Author(s)
      Giovanna Latronico, Paolo Mele et al
    • Organizer
      Muroran Institute of Technology Rare Earth Workshop 2023 - REWS2023 (online)
    • Invited
  • [Presentation] Overview of Co-free skutterudites belonging to the system Smy(FexNi1-x)4Sb122023

    • Author(s)
      Giovanna Latronico
    • Organizer
      Invited Seminar at Toyota Technological Institute (Nagoya)
    • Invited
  • [Presentation] Effects of the partial substitution of Sb with Sn in the system Smy(FexNi1-x)4Sb12-dSnd2023

    • Author(s)
      Giovanna Latronico, Paolo Mele et al
    • Organizer
      20th Thermoelectric Society of Japan Annual Meeting - TSJ2023 (Kitakyushu)
  • [Presentation] PLD thin films of Co-free filled skutterudites: complete study from the annealing parameters refinement to the production of a working on-chip device2023

    • Author(s)
      Giovanna Latronico, Paolo Mele et al
    • Organizer
      IUMRS-International Conference on Advanced Materials & 11th International Conference on Materials for Advanced Technologies - IUMRS-ICAM & ICMAT 2023 (Singapore)
    • Int'l Joint Research

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Published: 2024-12-25  

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