Microstructure tailoring in nanostructured thermoelectric materials

Jiang, Qinghui; Yang, Junyou; Liu, Yong; He, Honghui

doi:10.1142/s2010135x16300024

Cited by 25 publications

(9 citation statements)

References 95 publications

(63 reference statements)

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“…In practice, the nanostructured bulk thermoelectric materials have gained the most success in recent years in terms of achieving ZT values of around or above 2. The nanostructures in bulk thermoelectric materials, i.e., nanosized grains, lattice distortion, nanosized point defects, etc., are able to increase the phonon scattering independently, thus decreasing the lattice contribution of the thermal conductivity . Comprehensive information on the development of bulk thermoelectric materials can be found in plenty of reviews over the last 10 years …”

Section: Development Of Single‐source Energy Harvestersmentioning

confidence: 99%

Energy Harvesting Research: The Road from Single Source to Multisource

2018

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Energy harvesting technology may be considered an ultimate solution to replace batteries and provide a long-term power supply for wireless sensor networks. Looking back into its research history, individual energy harvesters for the conversion of single energy sources into electricity are developed first, followed by hybrid counterparts designed for use with multiple energy sources. Very recently, the concept of a truly multisource energy harvester built from only a single piece of material as the energy conversion component is proposed. This review, from the aspect of materials and device configurations, explains in detail a wide scope to give an overview of energy harvesting research. It covers single-source devices including solar, thermal, kinetic and other types of energy harvesters, hybrid energy harvesting configurations for both single and multiple energy sources and single material, and multisource energy harvesters. It also includes the energy conversion principles of photovoltaic, electromagnetic, piezoelectric, triboelectric, electrostatic, electrostrictive, thermoelectric, pyroelectric, magnetostrictive, and dielectric devices. This is one of the most comprehensive reviews conducted to date, focusing on the entire energy harvesting research scene and providing a guide to seeking deeper and more specific research references and resources from every corner of the scientific community.

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Section: Development Of Single‐source Energy Harvestersmentioning

confidence: 99%

Energy Harvesting Research: The Road from Single Source to Multisource

2018

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“…With energy shortage and more and more serious environmental problems due to the use of fossil fuel, the thermoelectric ( TE ) materials are increasingly favored by researchers due to allowing for thermal to electric energy direct conversion without hazardous liquids, moving parts, or greenhouse emissions. The TE conversion efficiency of a material can be gauged by the dimensionless figure of merit ZT = ( PF/κ ) T and power factor PF = α 2 / ρ , where α , ρ , κ , and T are the Seebeck coefficient, electrical resistivity, thermal conductivity, and absolute temperature, respectively . Although the benefits of the solid state thermoelectric power generation are notable, the low energy conversion efficiency results in only limited market, such as power supply for the space exploring mission and portable refrigerator.…”

Section: Introductionmentioning

confidence: 99%

Changing the Band Gaps by Controlling the Distribution of Initial Particle Size to Improve the Power Factor of N‐Type Bi₂Te₃ Based Polycrystalline Bulks

Zhang

Fan

et al. 2017

Adv Eng Mater

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In this work, n-type Bi 2 Te 2.7 Se 0.3 bulks are prepared by resistance pressure sintering technique from different particle sized powders, and the microstructure and electrical transport properties are investigated as function of the initial particle size distribution. With the initial particle size decreasing, more antisite defects, grain-boundaries and interface defects are introduced, and lead to a larger carrier concentration due to donor-like effect and a lower mobility due to the increasing grain boundary and carrier scattering, which results in a lower Seebeck coefficient and electrical resistivity. As a result, a maximum power factor of about 2.89 mW mK À2 at room temperature is achieved for the bulk sintered from the mix powders with different particle size distribution due to the optimization of the carrier concentration. The band gaps and the intrinsic excitation temperature are effectively adjusted by controlling the particle size in a narrow distribution. The sample sintered from the powders below 400 mesh has the highest average power factor above 2.44 mW mK À2 in the whole testing temperature range due to the improving band gaps and intrinsic excitation temperature.

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“…Recently, the thermoelectric (TE) materials have attracted considerable attention due to their wide application prospects in direct thermal‐to‐electrical energy conversion and solid‐state refrigeration due to without hazardous liquids, moving parts, and greenhouse emissions . Bismuth telluride‐based alloys are the best commercial TE material with maximum non‐dimensional figure of merit (ZT values) of 1.0 near room temperature, which are typically produced by Bridgman or zone‐melting techniques .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Porosity and Milling Induced Defects on the Thermoelectric Properties of p‐Type Bi₂Te₃‐Based Bulks

Zhang

Fan

et al. 2016

Adv Eng Mater

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The p-type (Bi,Sb) 2 Te 3 bulks are prepared from ball-milling powders by resistance pressure sintering method and their thermoelectric properties are investigated as a function of ball milling time. Prolonging milling time would introduce more anti-site defects, interaction of vacancies and antisite defect, grain-boundaries and interface defects, leading to lower carrier concentration and mobility. The peak value of ZT ¼ 1.0 is achieved at 300 K for the 5 h sample. When the testing temperature is over 323 K, the ZT value of the 0 h sample is higher than that of the 5 h sample. The effect of porosity on the thermoelectric properties is also investigated by effective medium theory. As the porosity increased, the electrical resistivity increases and the thermal conductivity decrease.

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Microstructure tailoring in nanostructured thermoelectric materials

Cited by 25 publications

References 95 publications

Energy Harvesting Research: The Road from Single Source to Multisource

Energy Harvesting Research: The Road from Single Source to Multisource

Changing the Band Gaps by Controlling the Distribution of Initial Particle Size to Improve the Power Factor of N‐Type Bi₂Te₃ Based Polycrystalline Bulks

The Effect of Porosity and Milling Induced Defects on the Thermoelectric Properties of p‐Type Bi₂Te₃‐Based Bulks

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Microstructure tailoring in nanostructured thermoelectric materials

Cited by 25 publications

References 95 publications

Energy Harvesting Research: The Road from Single Source to Multisource

Energy Harvesting Research: The Road from Single Source to Multisource

Changing the Band Gaps by Controlling the Distribution of Initial Particle Size to Improve the Power Factor of N‐Type Bi2Te3 Based Polycrystalline Bulks

The Effect of Porosity and Milling Induced Defects on the Thermoelectric Properties of p‐Type Bi2Te3‐Based Bulks

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Changing the Band Gaps by Controlling the Distribution of Initial Particle Size to Improve the Power Factor of N‐Type Bi₂Te₃ Based Polycrystalline Bulks

The Effect of Porosity and Milling Induced Defects on the Thermoelectric Properties of p‐Type Bi₂Te₃‐Based Bulks