Enhanced Thermoelectric Properties of WS2/Single-Walled Carbon Nanohorn Nanocomposites
| Autor: | Keun Soo Kim, Seunggun Yu, Sang Won Lee, Yoong Ahm Kim, Cheol-Min Yang, Ji Hoon Kim, Seung Yong Lee |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Annealing (metallurgy) General Chemical Engineering Tungsten disulfide Sintering 02 engineering and technology Single-walled carbon nanohorn 010402 general chemistry 01 natural sciences single-walled carbon nanohorns Inorganic Chemistry chemistry.chemical_compound tungsten disulfide Seebeck coefficient Thermoelectric effect lcsh:QD901-999 high frequency induction heated sintering system General Materials Science Nanocomposite thermoelectric materials 021001 nanoscience & nanotechnology Condensed Matter Physics Thermoelectric materials 0104 chemical sciences chemistry Chemical engineering lcsh:Crystallography 0210 nano-technology |
| Zdroj: | Crystals, Vol 10, Iss 2, p 140 (2020) Crystals Volume 10 Issue 2 |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst10020140 |
| Popis: | 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/mK2 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. |
| Databáze: | OpenAIRE |
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