A p-type multi-wall carbon nanotube/Te nanorod composite with enhanced thermoelectric performance

Park, Dabin; Ju, Heongkyu; Oh, Tong In; Kim, Jooheon

doi:10.1039/c7ra13572f

Cited by 24 publications

(7 citation statements)

References 40 publications

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“…MWCNTs have also been explored as conductive fillers in TE composites with tellurium nanorods synthesized from a Te precursor solution via a polyvinylpyrrolidone-assisted solution-phase process. , Although the MWCNTs result in a decrease of the Seebeck coefficient of the composite, low loadings (<2 wt %) enhance the electrical conductivity and suppress the lattice thermal conductivity, presumably due to phonon scattering at the interface between the two components, resulting in an enhanced TE power factor a peak zT for the composite with 2 wt % MWCNT. Composites with chemically synthesized Te nanorods outperform those prepared from ball-milled Te beads, primarily due to the improved electrical conductivity and reduced thermal conductivity …”

Section: State-of-the-art Materialsmentioning

confidence: 99%

Unconventional Thermoelectric Materials for Energy Harvesting and Sensing Applications

et al. 2021

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Heat is an abundant but often wasted source of energy. Thus, harvesting just a portion of this tremendous amount of energy holds significant promise for a more sustainable society. While traditional solid-state inorganic semiconductors have dominated the research stage on thermal-to-electrical energy conversion, carbon-based semiconductors have recently attracted a great deal of attention as potential thermoelectric materials for low-temperature energy harvesting, primarily driven by the high abundance of their atomic elements, ease of processing/manufacturing, and intrinsically low thermal conductivity. This quest for new materials has resulted in the discovery of several new kinds of thermoelectric materials and concepts capable of converting a heat flux into an electrical current by means of various types of particles transporting the electric charge: (i) electrons, (ii) ions, and (iii) redox molecules. This has contributed to expanding the applications envisaged for thermoelectric materials far beyond simple conversion of heat into electricity. This is the motivation behind this review. This work is divided in three sections. In the first section, we present the basic principle of the thermoelectric effects when the particles transporting the electric charge are electrons, ions, and redox molecules and describe the conceptual differences between the three thermodiffusion phenomena. In the second section, we review the efforts made on developing devices exploiting these three effects and give a thorough understanding of what limits their performance. In the third section, we review the state-of-the-art thermoelectric materials investigated so far and provide a comprehensive understanding of what limits charge and energy transport in each of these classes of materials.

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Section: State-of-the-art Materialsmentioning

confidence: 99%

Unconventional Thermoelectric Materials for Energy Harvesting and Sensing Applications

et al. 2021

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“…To solve this problem, some researchers have focused on improving the electrical conductivity of Te-based thermoelectric devices 13–16 . Preparing composites of Te with other similar materials is a simple way to improve its thermoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of one-dimensional Te/Cu2Te nanorod composites with improved thermoelectric power factor and low thermal conductivity

Park

et al. 2018

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In this study, Te/Cu2Te nanorod composites were synthesized using various properties of Cu2Te, and their thermoelectric properties were investigated. The nanorods were synthesized through a solution phase mixing process, using polyvinylpyrrolidone (PVP). With increasing Cu2Te content, the composites exhibited a reduced Seebeck coefficient and enhanced electrical conductivity. These characteristic changes were due to the high electrical conductivity and low Seebeck coefficient of Cu2Te. The composite containing 30 wt.% of Cu2Te nanorods showed the maximum power factor (524.6 μV/K at room temperature). The two types of nanorods were assembled into a 1D nanostructure, and with this structure, thermal conductivity decreased owing to the strong phonon scattering effect. This nanorod composite had a dramatically improved ZT value of 0.3, which was ~545 times larger than that of pristine Te nanorods.

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“…The S value of the N 2 H 4 ÁH 2 O-synthesized Te NWs in this work is 440 mV K À1 , which is consistent with Park's work. 34 In terms of the power factor (sS 2 ), the optimized sS 2 value was enhanced with the increase in the reaction temperature ( Fig. 3D).…”

Section: Thermoelectric Propertiesmentioning

confidence: 93%

“…Surfactants are usually employed to stabilize and induce the topography of Te NMs by adsorbing on the surface of Te NMs. 34,35 However, the adsorption between surfactants and Te NMs may inevitably block the contacts between Te NMs, resulting in inferior electrical conductivity to Te NMs. 15 It is also a challenge to remove the surfactants from the surface of Te NMs without undesired effects.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of air-stable tellurium nanowires via biomolecule-assisted hydrothermal for thermoelectrics

et al. 2020

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A p-type multi-wall carbon nanotube/Te nanorod composite with enhanced thermoelectric performance

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.

Cited by 24 publications

References 40 publications

Unconventional Thermoelectric Materials for Energy Harvesting and Sensing Applications

Unconventional Thermoelectric Materials for Energy Harvesting and Sensing Applications

Facile fabrication of one-dimensional Te/Cu2Te nanorod composites with improved thermoelectric power factor and low thermal conductivity

Green synthesis of air-stable tellurium nanowires via biomolecule-assisted hydrothermal for thermoelectrics

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