Graphene-enhanced thermoelectric properties of p-type skutterudites

Dandan Qin; Yuan Liu; Xianfu Meng; Bo Cui; Yaya Qi; Wei Cai; Jiehe Sui

doi:10.1088/1674-1056/27/4/048402

Graphene-enhanced thermoelectric properties of p-type skutterudites

Dandan Qin
, Yuan Liu
, Xianfu Meng
, Bo Cui
, Yaya Qi
, Wei Cai
, Jiehe Sui^*

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
University of Houston
Fresenius Kabi USA, LLC

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Nanocomposite is proved to be an effective method to improve thermoelectric performance. In the present study, graphene is introduced into p-type skutterudite La_0.8Ti_0.1Ga_0.1Fe₃CoSb₁₂ 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 La_0.8Ti_0.1Ga_0.1Fe₃CoSb₁₂, 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 La_0.8Ti_0.1Ga_0.1Fe₃CoSb₁₂/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.

Original language	English
Article number	048402
Journal	Chinese Physics B
Volume	27
Issue number	4
DOIs	https://doi.org/10.1088/1674-1056/27/4/048402
State	Published - Apr 2018

Keywords

grapheme
nanocomposites
skutterudites
thermoelectric properties

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10.1088/1674-1056/27/4/048402

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@article{527bc44386564fe6a5d1cfc099bf94b3,

title = "Graphene-enhanced thermoelectric properties of p-type skutterudites",

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.",

keywords = "grapheme, nanocomposites, skutterudites, thermoelectric properties",

author = "Dandan Qin and Yuan Liu and Xianfu Meng and Bo Cui and Yaya Qi and Wei Cai and Jiehe Sui",

note = "Publisher Copyright: {\textcopyright} 2018 Chinese Physical Society and IOP Publishing Ltd.",

year = "2018",

month = apr,

doi = "10.1088/1674-1056/27/4/048402",

language = "英语",

volume = "27",

journal = "Chinese Physics B",

issn = "1674-1056",

publisher = "Institute of Physics",

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TY - JOUR

T1 - Graphene-enhanced thermoelectric properties of p-type skutterudites

AU - Qin, Dandan

AU - Liu, Yuan

AU - Meng, Xianfu

AU - Cui, Bo

AU - Qi, Yaya

AU - Cai, Wei

AU - Sui, Jiehe

PY - 2018/4

Y1 - 2018/4

N2 - 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.

AB - 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.

KW - grapheme

KW - nanocomposites

KW - skutterudites

KW - thermoelectric properties

UR - https://www.scopus.com/pages/publications/85046440414

U2 - 10.1088/1674-1056/27/4/048402

DO - 10.1088/1674-1056/27/4/048402

M3 - 文章

AN - SCOPUS:85046440414

SN - 1674-1056

VL - 27

JO - Chinese Physics B

JF - Chinese Physics B

IS - 4

M1 - 048402

ER -

Graphene-enhanced thermoelectric properties of p-type skutterudites

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Keywords

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