Thermoelectric behavior of bulk-type functionalized-SWCNT incorporated Te nanowire/PMMA hybrid nanocomposites with a segregated structure
- Authors
- Kim, Seil; Song, Yoseb; Ryu, Seung Han; Hwang, Tae-Yeon; Lee, Youngsuk; Lim, Jae-Hong; Lee, Joo-Yul; Lee, Kyu-Hwan; Choa, Yong-Ho
- Issue Date
- Aug-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Thermoelectrics; Hybrid nanocomposite; Surface modification; Tellurium nanowire; Single-walled carbon nanotube
- Citation
- SYNTHETIC METALS, v.254, pp.56 - 62
- Journal Title
- SYNTHETIC METALS
- Volume
- 254
- Start Page
- 56
- End Page
- 62
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/1159
- DOI
- 10.1016/j.synthmet.2019.06.002
- ISSN
- 0379-6779
- Abstract
- 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 mu V/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.
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