Thermoelectric behavior of bulk-type functionalized-SWCNT incorporated Te nanowire/PMMA hybrid nanocomposites with a segregated structure
| Autor: | Young-Suk Lee, Seil Kim, Jae-Hong Lim, Joo-Yul Lee, Tae-Yeon Hwang, Yoseb Song, Seung Han Ryu, Yong-Ho Choa, Kyu Hwan Lee |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Nanocomposite Mechanical Engineering Metals and Alloys Nanowire Percolation threshold 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Thermoelectric materials 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Thermal conductivity Mechanics of Materials law Seebeck coefficient Thermoelectric effect Materials Chemistry Composite material 0210 nano-technology |
| Zdroj: | Synthetic Metals. 254:56-62 |
| ISSN: | 0379-6779 |
| Popis: | A three-dimensional thermoelectric (TE) nanocomposite based on functionalized single-walled carbon nanotubes (f-SWCNTs), tellurium nanowires (Te NWs), and polymethyl methacrylate (PMMA) microbeads was fabricated by a hot compaction via solvent casting. We chose a minimum content of f-SWCNTs of 1 wt% for fabricating the nanocomposite based on percolation threshold. The nanocomposite containing 2 wt% f-SWCNTs and 48 wt% Te NWs exhibited an electrical conductivity of 0.93 S/cm, a Seebeck coefficient of 303 μV/K, a thermal conductivity of 0.23 W/mK and a figure-of-merit (ZT) of 0.01 at RT. The electrical conductivity of the nanocomposite were higher than that of the Te NW/PMMA nanocomposite. In contrast, the thermal conductivity value showed a trend opposite to that of the electrical conductivity. This is because the f-SWCNTs formed bridges between the Te NWs into the nanocomposite, resulting in heterostructured interfaces. We believe that this-type nanocomposite can be widely used for thermoelectric generators at low temperature. |
| Databáze: | OpenAIRE |
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