Enhanced Thermoelectric Properties of WS2/Single-Walled Carbon Nanohorn Nanocomposites

被引：14

作者：

Kim, Ji Hoon ^{[1
,2
]}

Yu, Seunggun ^{[3
]}

Lee, Sang Won ^{[4
]}

Lee, Seung-Yong ^{[5
]}

Kim, Keun Soo ^{[6
,7
]}

Kim, Yoong Ahm ^{[2
]}

Yang, Cheol-Min ^{[1
]}

机构：

[1] Korea Inst Sci & Technol KIST, Inst Adv Composite Mat, Jellabuk Do 55324, South Korea

[2] Chonnam Natl Univ, Grad Sch, Dept Polymer Engn, Gwangju 61186, South Korea

[3] KERI, Insulat Mat Res Ctr, Chang Won 51543, South Korea

[4] Korea Inst Carbon Convergence Technol, Res Ctr Carbon Convergence Mat, Jeonju 54853, Jeollabuk Do, South Korea

[5] LG Innotek, Magok R&D Campus, Seoul 07796, South Korea

[6] Sejong Univ, Dept Phys, 209 Neungdong Ro, Seoul 05006, South Korea

[7] Sejong Univ, Graphene Res Inst, Texas Photon Ctr Int Res Ctr, 209 Neungdong Ro, Seoul 05006, South Korea

来源：

CRYSTALS | 2020年 / 10卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

tungsten disulfide; single-walled carbon nanohorns; thermoelectric materials; high frequency induction heated sintering system; NANOSTRUCTURES; POWER; PBTE;

D O I：

10.3390/cryst10020140

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Recently, two-dimensional tungsten disulfide (WS2) has attracted attention as a next generation thermoelectric material due to a favorable Seebeck coefficient. However, its thermoelectric efficiency still needs to be improved due to the intrinsically low electrical conductivity of WS2. In the present study, thermoelectric properties of WS2 hybridized with highly conductive single-walled carbon nanohorns (SWCNHs) were investigated. The WS2/SWCNH nanocomposites were fabricated by annealing the mixture of WS2 and SWCNHs using a high-frequency induction heated sintering (HFIHS) system. By adding SWCNHs to WS2, the nanocomposites exhibited increased electrical conductivity and a slightly decreased Seebeck coefficient with the content of SWCNHs. Hence, the maximum power factor of 128.41 mu W/mK(2) was achieved for WS2/SWCNHs with 0.1 wt.% SWCNHs at 780 K, resulting in a significantly improved thermoelectric figure of merit (zT) value of 0.027 compared to that of pristine WS2 with zT 0.017.

引用

页数：10

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