Bi2Te3-based applied thermoelectric materials: research advances and new challenges

Pei, Jun; Cai, Bowen; Zhuang, Hua‐Lu; Li, Jing‐Feng

doi:10.1093/nsr/nwaa259

Cited by 236 publications

(126 citation statements)

References 16 publications

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“…Among various TE materials, Bi 2 Te 3 -based compounds have shown the best performance. These materials have been most widely used due to their outstanding advantages in electronic cooling and low-temperature waste heat harvesting and conversion, and have been commercialized successfully [27]. Many studies have shown that fabrication of nanocomposites through the dispersion of nanoparticles into the p-type (Bi,Sb) 2 Te 3 matrix is an effective method for obtaining improved TE properties [17,[28][29][30]; however, the relationship between the nanoparticle size and TE properties is still unclear.…”

Section: Introductionmentioning

confidence: 99%

(Bi,Sb)2Te3/SiC nanocomposites with enhanced thermoelectric performance: Effect of SiC nanoparticle size and compositional modulation

et al. 2021

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Fabrication of nanoparticle-dispersed composites is an effective strategy for enhancing the performance of thermoelectric materials, and in particular SiC nanoparticles have been often used to create composites with Bi 2 Te 3 -based applied thermoelectric materials. However, the effect of particle size on the thermoelectric performance is unclear. This work systematically investigated the electrical and thermal properties of a series of (Bi,Sb) 2 Te 3 -based nanocomposites containing dispersed SiC nanoparticles of different sizes. It was found that particle size has a significant impact on the electrical properties with smaller SiC nanoparticles giving rise to higher electrical conductivity. Even though the dispersed SiC nanoparticles enhanced the Seebeck coefficient, no apparent dependence of the enhancement on the particle size was observed. It was also found that smaller SiC nanoparticles scatter phonons to some extent while the larger nanoparticles contribute to increased thermal conductivity. Eventually, the highest ZT value of 1.12 was obtained in 30 nm-SiC dispersed sample, corresponding to an increase by 18% from 0.95 for the matrix made from commercial scraps, and then the ZT was further boosted to 1.33 by optimizing the matrix composition and expelling excess Te during the optimized spark plasma sintering process. This work proves that the dispersion of smaller SiC nanoparticles in p-type (Bi,Sb) 2 Te 3 materials is more effective than the dispersion of larger nanoparticles. In addition, it is revealed that additional compositional and/or processing optimization is vital and effective for obtaining further performance enhancement for nanocomposites of SiC nanoparticles dispersed in (Bi,Sb) 2 Te 3 .

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Section: Introductionmentioning

confidence: 99%

(Bi,Sb)2Te3/SiC nanocomposites with enhanced thermoelectric performance: Effect of SiC nanoparticle size and compositional modulation

et al. 2021

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“…Previous studies have shown that Bi 0.4 Sb 1.6 Te 3 (BST) possesses the optimal p ($10 19 cm À3 ) and the highest PF ($45 mW cm À1 K À2 ) at room temperature. [8][9][10][11] On the other hand, nanostructuring and nanocompositing in bulk materials have been widely employed to intensify the scattering of phonons in order to reduce k. [12][13][14][15] Compared to TE nanomaterials, nanocomposite TE materials are relatively easy to prepare and investigate. The introduction of nanoinclusions into bulk TE materials can simultaneously create a high density of phase boundaries to scatter phonons in order to greatly lower k. However, in this case PF generally declines due to sharp reduction in carrier mobility m. Therefore, whether one can introduce nanoinclusions into BST alloys that can not only reduce k but also enhance PF is greatly challenging, because this will bring a large improvement of ZT.…”

Section: Introductionmentioning

confidence: 99%

Nanoarchitectonics of p-type BiSbTe with improved figure of merit via introducing PbTe nanoparticles

Ren

Sun

et al. 2021

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“…Recently, Li et al. [ 117 ] analyzed the performance‐related advantages of bismuth telluride‐based TE materials and summarized progress in research in the area in the last few years. They also noted reasons for the slow improvement in the performance of n‐type bismuth telluride‐based materials and coping strategies.…”

Section: Fabrication and Design Of Wearable Thermoelectric Generatorsmentioning

confidence: 99%

Wearable Thermoelectric Materials and Devices for Self‐Powered Electronic Systems

et al. 2021

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Because of their readiness and high power bandwidth, batteries are the preeminent source of power supply for portable electronics, but are subject to periodic recharging and replacement. Hence, a key challenge is to design suitable and sustainable power sources for portable electronic devices. Harvesting energy from the human body is suitable for providing consistent and uninterrupted energy for wearable electronic devices. The daily activities of a 68-kg adult can generate over 100 W of power, through breathing, heating, blood transport, and walking. [3] Thus, converting 1% of the power generated by the human body may be enough to support the work of most portable electronics. Various energy-harvesting technologies, such as, triboelectric nanogenerators (TENGs), [4][5][6] piezoelectric nanogenerators, [7] and thermoelectric generators (TEGs), [8] have been developed to convert human energy (from human motion and body heat) into electricity. In line with recent developments in wearable electronics and e-skins, the use of a self-powered direct-current (DC) electric power supplier is inevitable for activating human body-adjustable electronic systems. [9] Among the various energy-autonomous devices, [10] only TEGs can permanently produce DC electric power without complex power managing components, and they are maintenance free. Moreover, solar energy and vibration-based energy harvesters areThe emergence of artificial intelligence and the Internet of Things has led to a growing demand for wearable and maintenance-free power sources. The continual push toward lower operating voltages and power consumption in modern integrated circuits has made the development of devices powered by body heat finally feasible. In this context, thermoelectric (TE) materials have emerged as promising candidates for the effective conversion of body heat into electricity to power wearable devices without being limited by environmental conditions. Driven by rapid advances in processing technology and the performance of TE materials over the past two decades, wearable thermoelectric generators (WTEGs) have gradually become more flexible and stretchable so that they can be used on complex and dynamic surfaces. In this review, the functional materials, processing techniques, and strategies for the device design of different types of WTEGs are comprehensively covered. Wearable self-powered systems based on WTEGs are summarized, including multi-function TE modules, hybrid energy harvesting, and all-in-one energy devices. Challenges in organic TE materials, interfacial engineering, and assessments of device performance are discussed, and suggestions for future developments in the area are provided. This review will promote the rapid implementation of wearable TE materials and devices in self-powered electronic systems.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202102990.

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Bi2Te3-based applied thermoelectric materials: research advances and new challenges

Cited by 236 publications

References 16 publications

(Bi,Sb)2Te3/SiC nanocomposites with enhanced thermoelectric performance: Effect of SiC nanoparticle size and compositional modulation

(Bi,Sb)2Te3/SiC nanocomposites with enhanced thermoelectric performance: Effect of SiC nanoparticle size and compositional modulation

Nanoarchitectonics of p-type BiSbTe with improved figure of merit via introducing PbTe nanoparticles

Wearable Thermoelectric Materials and Devices for Self‐Powered Electronic Systems

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