Carbon based thermoelectric materials for energy harvesting

A typical carbon nanotube has a good electrical conductivity, abundant availability, and great flexibility that are best suited to the electrical devices, but its extreme low Seebeck coefficient and high thermal conductivity have prevented it from being a feasible candidate for thermoelectric device...

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Main Author: Qiu, Zhe
Other Authors: Alex Yan Qingyu
Format: Final Year Project
Language:English
Published: 2015
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Online Access:http://hdl.handle.net/10356/62537
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-625372023-03-04T15:36:28Z Carbon based thermoelectric materials for energy harvesting Qiu, Zhe Alex Yan Qingyu School of Materials Science and Engineering DRNTU::Engineering::Materials A typical carbon nanotube has a good electrical conductivity, abundant availability, and great flexibility that are best suited to the electrical devices, but its extreme low Seebeck coefficient and high thermal conductivity have prevented it from being a feasible candidate for thermoelectric devices. In this report, a new approach to enhance carbon nanotubes based composites has been presented. It has the advantages of easy-to-manufacture, lightweight, versatility, and less toxicity compared to traditional inorganic thermoelectric materials. Hybrid nanocomposites consist of single walled carbon nanotubes (SWCNTs) and silver telluride (Ag2Te) nanoparticles synthesized by solvothermal technique. This technique used carbon nanotubes (CNTs) as template and silver precursors reacting with TOP–Te. XRD and TEM images show that Ag2Te nanoparticles were randomly embedded on CNTs bundles. The CNTs/Ag2Te nanocomposites exhibit a higher electrical conductivity > 20 000 S/m and an enhanced Seebeck coefficient up to 228 μV K−1 with a negative sign (n-type), which is more than one order of magnitude higher than all the reported CNTs-based materials’ values previously. This study has confirmed the synergistic enhancement effects within CNTs/Ag2Te composites. It also suggests that similar approach of constructing composites structure by using other materials with high thermoelectric properties would be a novel and effective strategy to improve the thermoelectric performances of CNTs-based materials. All in all, CNTs-based composites materials show a promising potential to be utilized in next-generation thermoelectric devices. Bachelor of Engineering (Materials Engineering) 2015-04-15T02:13:45Z 2015-04-15T02:13:45Z 2015 2015 Final Year Project (FYP) http://hdl.handle.net/10356/62537 en Nanyang Technological University 44 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
spellingShingle DRNTU::Engineering::Materials
Qiu, Zhe
Carbon based thermoelectric materials for energy harvesting
description A typical carbon nanotube has a good electrical conductivity, abundant availability, and great flexibility that are best suited to the electrical devices, but its extreme low Seebeck coefficient and high thermal conductivity have prevented it from being a feasible candidate for thermoelectric devices. In this report, a new approach to enhance carbon nanotubes based composites has been presented. It has the advantages of easy-to-manufacture, lightweight, versatility, and less toxicity compared to traditional inorganic thermoelectric materials. Hybrid nanocomposites consist of single walled carbon nanotubes (SWCNTs) and silver telluride (Ag2Te) nanoparticles synthesized by solvothermal technique. This technique used carbon nanotubes (CNTs) as template and silver precursors reacting with TOP–Te. XRD and TEM images show that Ag2Te nanoparticles were randomly embedded on CNTs bundles. The CNTs/Ag2Te nanocomposites exhibit a higher electrical conductivity > 20 000 S/m and an enhanced Seebeck coefficient up to 228 μV K−1 with a negative sign (n-type), which is more than one order of magnitude higher than all the reported CNTs-based materials’ values previously. This study has confirmed the synergistic enhancement effects within CNTs/Ag2Te composites. It also suggests that similar approach of constructing composites structure by using other materials with high thermoelectric properties would be a novel and effective strategy to improve the thermoelectric performances of CNTs-based materials. All in all, CNTs-based composites materials show a promising potential to be utilized in next-generation thermoelectric devices.
author2 Alex Yan Qingyu
author_facet Alex Yan Qingyu
Qiu, Zhe
format Final Year Project
author Qiu, Zhe
author_sort Qiu, Zhe
title Carbon based thermoelectric materials for energy harvesting
title_short Carbon based thermoelectric materials for energy harvesting
title_full Carbon based thermoelectric materials for energy harvesting
title_fullStr Carbon based thermoelectric materials for energy harvesting
title_full_unstemmed Carbon based thermoelectric materials for energy harvesting
title_sort carbon based thermoelectric materials for energy harvesting
publishDate 2015
url http://hdl.handle.net/10356/62537
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