中国物理B ›› 2018, Vol. 27 ›› Issue (4): 48402-048402.doi: 10.1088/1674-1056/27/4/048402

所属专题： SPECIAL TOPIC — Recent advances in thermoelectric materials and devices

• TOPIC REVIEW—Thermal and thermoelectric properties of nano materials • 上一篇    下一篇

Graphene-enhanced thermoelectric properties of p-type skutterudites

Dandan Qin(秦丹丹), Yuan Liu(刘嫄), Xianfu Meng(孟宪福), Bo Cui(崔博), Yaya Qi(祁亚亚), Wei Cai(蔡伟), Jiehe Sui(隋解和)   

  1. 1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
    2. Department of Physics and TcSUH, University of Houston, Houston, Texas 77204, USA;
    3. Fresenius Kabi USA, LLC, Melrose Park, IL 60160, USA
  • 收稿日期:2018-01-15 修回日期:2018-03-08 出版日期:2018-04-05 发布日期:2018-04-05
  • 通讯作者: Jiehe Sui E-mail:suijiehe@hit.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51622101, 51771065, and 51471061).

Graphene-enhanced thermoelectric properties of p-type skutterudites

Dandan Qin(秦丹丹)1, Yuan Liu(刘嫄)2,3, Xianfu Meng(孟宪福)1, Bo Cui(崔博)2, Yaya Qi(祁亚亚)2, Wei Cai(蔡伟)2, Jiehe Sui(隋解和)1   

  1. 1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
    2. Department of Physics and TcSUH, University of Houston, Houston, Texas 77204, USA;
    3. Fresenius Kabi USA, LLC, Melrose Park, IL 60160, USA
  • Received:2018-01-15 Revised:2018-03-08 Online:2018-04-05 Published:2018-04-05
  • Contact: Jiehe Sui E-mail:suijiehe@hit.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51622101, 51771065, and 51471061).

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摘要： Nanocomposite is proved to be an effective method to improve thermoelectric performance. In the present study, graphene is introduced into p-type skutterudite La0.8Ti0.1Ga0.1Fe3CoSb12 by plasma-enhanced chemical vapor deposition (PECVD) method to form skutterudite/graphene nanocomposites. It is demonstrated that the graphene has no obvious effect on the electrical conductivity of La0.8Ti0.1Ga0.1Fe3CoSb12, but the Seebeck coefficient is slightly improved at high temperature, thereby leading to high power factor. Furthermore, due to the enhancement of phonon scattering by the graphene, the lattice thermal conductivity is reduced significantly. Ultimately, the maximum zT value of La0.8Ti0.1Ga0.1Fe3CoSb12/graphene is higher than that of graphene-free alloy and reaches to 1.0 at 723 K. Such an approach raised by us enriches prospects for future practical application.

关键词: skutterudites, graphene, nanocomposites, thermoelectric properties

Abstract: Nanocomposite is proved to be an effective method to improve thermoelectric performance. In the present study, graphene is introduced into p-type skutterudite La0.8Ti0.1Ga0.1Fe3CoSb12 by plasma-enhanced chemical vapor deposition (PECVD) method to form skutterudite/graphene nanocomposites. It is demonstrated that the graphene has no obvious effect on the electrical conductivity of La0.8Ti0.1Ga0.1Fe3CoSb12, but the Seebeck coefficient is slightly improved at high temperature, thereby leading to high power factor. Furthermore, due to the enhancement of phonon scattering by the graphene, the lattice thermal conductivity is reduced significantly. Ultimately, the maximum zT value of La0.8Ti0.1Ga0.1Fe3CoSb12/graphene is higher than that of graphene-free alloy and reaches to 1.0 at 723 K. Such an approach raised by us enriches prospects for future practical application.

Key words: skutterudites, graphene, nanocomposites, thermoelectric properties

中图分类号:  (Thermoelectric, electrogasdynamic and other direct energy conversion)

  • 84.60.Rb
72.15.Jf (Thermoelectric and thermomagnetic effects) 77.84.Cg (PZT ceramics and other titanates) 81.20.-n (Methods of materials synthesis and materials processing)