Spark plasma sintered Bi-Sb-Te alloys derived from ingot scrap: Maximizing thermoelectric performance by tailoring their composition and optimizing sintering time

Cai, Bowen; Zhuang, Hua‐Lu; Pei, Jun; Su, Bogong; Li, Jingwei; Hu, Haihua; Jiang, Yilin; Li, Jing‐Feng

doi:10.1016/j.nanoen.2021.106040

Cited by 45 publications

(53 citation statements)

References 46 publications

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“…Since minor Cu addition in Mg 3 Sb 1.5 Bi 0.5 realized the remarkable enhancement of low-temperature zT 33 , herein the nominal composition is Mg 3.2 Bi 1.5 Sb 0.48 Te 0.002 Cu 0.01 . We revealed that the spark plasma sintering (SPS) temperature has a noticeable impact on the thermoelectric properties, which is beyond the conventional understanding that sintering temperature only affects the densification mechanism or main-phase change 48,49 . The phase feature when sintered at the different temperatures was thoroughly investigated by a combination of X-ray diffraction (XRD) analysis, in situ SPS displacement record, and differential scanning calorimetry (DSC) measurement (Fig.…”

Section: Resultsmentioning

confidence: 97%

Maximizing the performance of n-type Mg3Bi2 based materials for room-temperature power generation and thermoelectric cooling

et al. 2022

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Although the thermoelectric effect was discovered around 200 years ago, the main application in practice is thermoelectric cooling using the traditional Bi2Te3. The related studies of new and efficient room-temperature thermoelectric materials and modules have, however, not come to fruition yet. In this work, the electronic properties of n-type Mg3.2Bi1.5Sb0.5 material are maximized via delicate microstructural design with the aim of eliminating the thermal grain boundary resistance, eventually leading to a high zT above 1 over a broad temperature range from 323 K to 423 K. Importantly, we further demonstrated a great breakthrough in the non-Bi2Te3 thermoelectric module, coupled with the high-performance p-type α-MgAgSb, for room-temperature power generation and thermoelectric cooling. A high conversion efficiency of ~2.8% at the temperature difference of 95 K and a maximum temperature difference of 56.5 K are experimentally achieved. If the interfacial contact resistance is further reduced, our non-Bi2Te3 module may rival the long-standing champion commercial Bi2Te3 system. Overall, this work represents a substantial step towards the real thermoelectric application using non-Bi2Te3 materials and devices.

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Section: Resultsmentioning

confidence: 97%

Maximizing the performance of n-type Mg3Bi2 based materials for room-temperature power generation and thermoelectric cooling

et al. 2022

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“…[4,5] Bismuth telluride (Bi 2 Te 3 ) and its alloys are state-of-the-art room-temperature TE materials, and are quite promising for low-grade waste heat recovery. [6][7][8][9][10][11] Persistent efforts have been devoted to improving their zT values, including manipulation of the fabrication processes, [12,13] fine-tuning the chemical doping, [14][15][16][17][18][19][20][21][22][23][24][25][26][27] and nanostructuring. [13] In particular, enhanced average zTs have been obtained in Bi 2 Te 3 -based composites with various kinds of nano-carbon materials, for example, carbon nanotubes, [28][29][30] carbon fibers, [31] and nano-SiC.…”

mentioning

confidence: 99%

Organic/Inorganic Hybrid Design as a Route for Promoting the Bi_0.5Sb_1.5Te₃ for High‐Performance Thermoelectric Power Generation

Wang

Cheng

Yin

et al. 2022

Adv Funct Materials

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Bismuth telluride alloys favor the applications of low-grade waste heat recovery if their figure-of-merits are improved within the larger temperature range from 300 to 523 K. Herein, this work reports a synergistic optimization for Bi 0.5 Sb 1.5 Te 3 (BST) by incorporating the copper(II) phthalocyanine (CuPc), which is preferentially distributed at the grain boundary of BST after the spark plasma sintering process and suppresses the grain growth of BST. The lattice thermal conductivity of composites is then extensively reduced by the multiscale scattering induced by the CuPc. In addition, the Cu atoms diffuse into the lattice of BST and increase the whole concentration, thus suppressing the bipolar effect. As a result, the average zT value is effectively enhanced from 0.7 to 1.1 in the temperature range between 300 and 523 K. A high conversion efficiency of 6.8% is achieved in a single BST/CuPc 5 leg, which is 41.7% higher than that of BST at temperature different ΔT = 223 K. This result proves that the composition optimization of the BST/CuPc is a promising strategy to improve the application of BST-based TE modules.

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“…Figure 4 shows a schematic of how thermoelectrics can benefit from the existing defects of the waste material. Recycling waste material into thermoelectrics is an area that has been explored for other elements, such as bismuth [126,127]. Cai et al recently explored the recyclability of bismuth antimony telluride thermoelectrics and discovered that the combination of reprocessed (Bi,Sb) 2 Te 3 scraps and nano-SiC showcased a better zT of 1.07 at 325 K even in comparison with the commercial alloy, which was 0.95.…”

Section: Recycled Siliconmentioning

confidence: 99%

Potential of Recycled Silicon and Silicon-Based Thermoelectrics for Power Generation

et al. 2022

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Thermoelectrics can convert waste heat to electricity and vice versa. The energy conversion efficiency depends on materials figure of merit, zT, and Carnot efficiency. Due to the higher Carnot efficiency at a higher temperature gradient, high-temperature thermoelectrics are attractive for waste heat recycling. Among high-temperature thermoelectrics, silicon-based compounds are attractive due to the confluence of light weight, high abundance, and low cost. Adding to their attractiveness is the generally defect-tolerant nature of thermoelectrics. This makes them a suitable target application for recycled silicon waste from electronic (e-waste) and solar cell waste. In this review, we summarize the usage of high-temperature thermoelectric generators (TEGs) in applications such as commercial aviation and space voyages. Special emphasis is placed on silicon-based compounds, which include some recent works on recycled silicon and their thermoelectric properties. Besides materials design, device designing considerations to further maximize the energy conversion efficiencies are also discussed. The insights derived from this review can be used to guide sustainable recycling of e-waste into thermoelectrics for power harvesting.

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Spark plasma sintered Bi-Sb-Te alloys derived from ingot scrap: Maximizing thermoelectric performance by tailoring their composition and optimizing sintering time

Cited by 45 publications

References 46 publications

Maximizing the performance of n-type Mg3Bi2 based materials for room-temperature power generation and thermoelectric cooling

Maximizing the performance of n-type Mg3Bi2 based materials for room-temperature power generation and thermoelectric cooling

Organic/Inorganic Hybrid Design as a Route for Promoting the Bi_0.5Sb_1.5Te₃ for High‐Performance Thermoelectric Power Generation

Potential of Recycled Silicon and Silicon-Based Thermoelectrics for Power Generation

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Spark plasma sintered Bi-Sb-Te alloys derived from ingot scrap: Maximizing thermoelectric performance by tailoring their composition and optimizing sintering time

Cited by 45 publications

References 46 publications

Maximizing the performance of n-type Mg3Bi2 based materials for room-temperature power generation and thermoelectric cooling

Maximizing the performance of n-type Mg3Bi2 based materials for room-temperature power generation and thermoelectric cooling

Organic/Inorganic Hybrid Design as a Route for Promoting the Bi0.5Sb1.5Te3 for High‐Performance Thermoelectric Power Generation

Potential of Recycled Silicon and Silicon-Based Thermoelectrics for Power Generation

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Organic/Inorganic Hybrid Design as a Route for Promoting the Bi_0.5Sb_1.5Te₃ for High‐Performance Thermoelectric Power Generation