A p-type multi-wall carbon nanotube/Te nanorod composite with enhanced thermoelectric performanceopen access
- Authors
- Park, Dabin; Ju, Hyun; Oh, Taeseob; Kim, Jooheon
- Issue Date
- Feb-2018
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.8, no.16, pp 8739 - 8746
- Pages
- 8
- Journal Title
- RSC ADVANCES
- Volume
- 8
- Number
- 16
- Start Page
- 8739
- End Page
- 8746
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1450
- DOI
- 10.1039/c7ra13572f
- ISSN
- 2046-2069
2046-2069
- Abstract
- In this study, multi-walled carbon nanotube (MWCNT)/tellurium (Te) nanorod composites with various MWCNT contents are prepared and their thermoelectric properties are investigated. The composite samples are prepared by mixing Te nanorods with surface-treated MWCNTs. Te nanorods are synthesized by solution phase mixing using polyvinylpyrrolidone (PVP). The MWCNTs used in this study are surface-treated with a solution consisting of H2SO4 and HNO3. With increasing MWCNT content, the composite samples exhibit a reduction in the Seebeck coefficient and enhanced electrical conductivity. The maximum power factor of 5.53 W m K-2 is observed at 2% MWCNT at room temperature. The thermal conductivity of the composite reduced after the introduction of MWCNTs into the Te nanorod matrix; this is attributed to the generation of heterostructured interfaces between MWCNTs and the Te nanorods. At room temperature, the composites containing 2% MWCNTs exhibited the maximum thermoelectric figure of merit (ZT), which is approximate to 3.91 times larger than that of pure Te nanorods.
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