Enhanced thermoelectric performance of Bi2Te3 based graphene nanocomposites

Ahmad, Kamsuriah; Wan, Chunlei; Al-Eshaikh, Mohammad A.; Kadachi, Ahmed N.

doi:10.1016/j.apsusc.2018.10.163

Cited by 60 publications

(22 citation statements)

References 42 publications

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“…The method is also capable of producing nanoparticle powder with pure phase [37][38][39]44,48] and homogenous doped particles [37]. It has been reported that the thermoelectric properties improve with smaller powder grain size, which exhibits low thermal conductivity [49,50]. Previous investigations on the properties of Ca 3 Co 4 O 9 powder using starch as fuel were only limited to the preparation of powder at different temperatures [45].…”

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confidence: 99%

Effects of calcination temperature and time on the Ca3Co4O9 purity when synthesized using starch-assisted sol-gel combustion method

2020

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Ca 3 Co 4 O 9 is a p-type semiconducting material that is well-known for its thermoelectric (TE), magnetic, electronic, and electro-optic properties. In this study, sol-gel autoignition was used to prepare Ca 3 Co 4 O 9 at different calcination temperatures (773, 873, 973, and 1073 K) and time (4, 6, 8, 10, 12, and 14 h) using starch as a fuel. The phase and microstructure of the prepared Ca 3 Co 4 O 9 powder were investigated. Thermogravimetry-differential thermal analysis (TGA) confirms that the final weight loss occurred at 1073 K to form Ca 3 Co 4 O 9 stable powder. The variable-pressure scanning electron microscopy (VP-SEM) images show that the size of powder particles increases from 1.15 to 1.47 μm as calcination time increases from 4 to 12 h, and the size remains almost constant thereafter. A similar pattern is also observed on the increment of the crystallite size and percentage of crystallinity with X-ray diffraction (XRD) analysis. The highest crystallinity is found about 92.9% when the powder was calcinated at 1073 K for 12 and 14 h with 458 and 460 Å crystallite size, respectively. Energy dispersive X-ray spectroscopy (EDS) analysis demonstrates that the calcinated powder has a high intensity of Ca, Co, and O with uniform distribution. High-resolution transmission electron microscopy (HRTEM) images prove that there is no distinct lattice distortion defect on the crystal structure.

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confidence: 99%

Effects of calcination temperature and time on the Ca3Co4O9 purity when synthesized using starch-assisted sol-gel combustion method

2020

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“…In addition, the potential candidates for low-operating-temperature TE materials are only laboratory technologies at present, and large-scale, low-cost preparation technologies need to be explored further. Very recently, research on graphene, single-walled carbon nanotubes (SWCNTs), and TE material nanocomposites demonstrated better ZT performance, as well as improved electrical conductivity (σ) and were successful in suppressing the thermal conductivity, κ [ 27 , 165 , 166 , 167 ]. The κ of TE nanocomposites is predicted to be lower than that of their bulk equivalents of the same chemical configuration.…”

Section: Conclusion and Future Researchmentioning

confidence: 99%

“…Very recently, research on graphene, single-walled carbon nanotubes (SWCNTs), and TE material nanocomposites demonstrated better ZT performance, as well as improved electrical conductivity (σ) and were successful in suppressing the thermal conductivity, κ [ 27 , 165 , 166 , 167 ]. The κ of TE nanocomposites is predicted to be lower than that of their bulk equivalents of the same chemical configuration.…”

Section: Conclusion and Future Researchmentioning

confidence: 99%

Review of Thermoelectric Generators at Low Operating Temperatures: Working Principles and Materials

et al. 2021

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Thermoelectric generators (TEGs) are a form of energy harvester and eco-friendly power generation system that directly transform thermal energy into electrical energy. The thermoelectric (TE) method of energy harvesting takes advantage of the Seebeck effect, which offers a simple solution for fulfilling the power-supply demand in almost every electronics system. A high-temperature condition is commonly essential in the working mechanism of the TE device, which unfortunately limits the potential implementation of the device. This paper presents an in-depth analysis of TEGs at low operating temperature. The review starts with an extensive description of their fundamental working principles, structure, physical properties, and the figure of merit (ZT). An overview of the associated key challenges in optimising ZT value according to the physical properties is discussed, including the state of the art of the advanced approaches in ZT optimisation. Finally, this manuscript summarises the research status of Bi2Te3-based semiconductors and other compound materials as potential materials for TE generators working at low operating temperatures. The improved TE materials suggest that TE power-generation technology is essential for sustainable power generation at near-room temperature to satisfy the requirement for reliable energy supplies in low-power electrical/electronics systems.

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“…[18] [19] Moreover, the addition of graphene to a host biomaterial has the potential to increase the conductivity if uniformly incorporated, even at low vol% due to its high intrinsic conductivity; unique properties of graphene can be transferred to the host surface for biomechanical applications. [20]…”

Section: Graphene-like Materialsmentioning

confidence: 99%

Solid State Chemistry: Computational Chemical Analysis for Materials Science

Silva

Galmarini

Maurizi

et al. 2020

Computational Techniques for Analytical Chemistry and Bioanalysis

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We present an overview of computational analytical methodologies and protocols applied to materials analysis, and their surfaces and interfaces with the surrounding environments. As we discuss the current advances and limitations of in-silico measurements applied to materials science, we highlight their complementary achievements and their innovative predictions in the view of their experimental counterparts. We focus on elemental, structural and chemical analyses of complex advanced materials, either homogeneous or heterogeneous targets. Table of Content this will be updated automatically in my version1. Computational Spectroscopy -Interaction between matter and electromagnetic radiation. This section will cover the application of these techniques to bulk, surfaces, interfaces and nanoparticles. a. Emission spectroscopy.

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Enhanced thermoelectric performance of Bi2Te3 based graphene nanocomposites

Cited by 60 publications

References 42 publications

Effects of calcination temperature and time on the Ca3Co4O9 purity when synthesized using starch-assisted sol-gel combustion method

Effects of calcination temperature and time on the Ca3Co4O9 purity when synthesized using starch-assisted sol-gel combustion method

Review of Thermoelectric Generators at Low Operating Temperatures: Working Principles and Materials

Solid State Chemistry: Computational Chemical Analysis for Materials Science

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