Besides the improvement of thermoelectric materials, device optimization is a crucial factor for efficient heattoelectric power conversion and one of the key challenges is how to create a large temperature across a thermoelectric generator especially in the case of a dilute incident heat flux. Highthermoelectric performance of nanostructured bismuth. Sep 19, 2012 northwestern university scientists have developed a thermoelectric material that is the best in the world at converting waste heat to electricity. In this paper, we identified the relationship between the asymmetrical thermoelectric performance and the weighted mobility ratio, a correlation that can help. Highperformance thermoelectrics from cellular nanostructured. In this work, we demonstrate the use of high performance nanostructured pbtebased materials in high conversion efficiency thermoelectric modules. High thermoelectric cooling performance of ntype mg3bi2. Published 12 may 2008 iop publishing ltd nanotechnology, volume 19, number 24. Convergence of electronic bands for high performance bulk thermoelectrics. To achieve the peak zt, nanostructured thermoelectric materials require high doping concentration. The microstructural and thermoelectric te properties were investigated with a special emphasis on. The nondimensional figureofmerit zt is defined as zt s 2. The structures can be combined into multichip devices to provide additional thermoelectric performance. High thermoelectric performance by resonant dopant indium in.
Thus, a high performance thermoelectric material requires high electrical conductivity, seebeck coefficient, and low thermal conductivity. Towards high performance nanostructured thermoelectric materials. Thermoelectric materials have been widely investigated and have shown great promise as a sustainable source of energy. Conversion efficiency and effective properties of particulatereinforced thermoelectric composites. Mar, 2009 the combined effect of in and ce doping results in high performance skutterudite materials. Highperformance nanostructured thermoelectric generators. Highefficiency thermoelectric materials are an important material system for power generation devices that convert waste heat into electrical energy. Nanostructuring is definitely one of the effective approaches to improving thermoelectric figure of merit. In this paper, we identified the relationship between the asymmetrical thermoelectric performance and the weighted mobility ratio, a correlation that can. Based thermoelectric materials, chemphyschem on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Thermoelectric performance enhancement is realized in most.
High performance graphene nanoribbon thermoelectric. High electrical conductivity corresponding to low joule heating, a large seebeck coefficient corresponding to large potential difference and low thermal. High performance nanostructured thermoelectric materials jingfeng li1, weishu liu 1,2, lidong zhao1,2 and min zhou1,3 tsinghua university, china thermoelectric eff ects enable direct conversion between thermal and electrical energy and provide an alternative route for power generation and refrigeration. Therefore, the potential of developing highefficiency thermoelectric materials for. Nanostructured thermoelectric materials with improved performance for energy conversion. In one embodiment, the invention provides a method of forming a photovoltaic material, the method comprising. Ecofriendly highperformance silicide thermoelectric materials. Of various types of thermoelectric materials, nanostructured materials have shown the. Last two decades have witnessed significant progress in thermoelectric research, to which materials processing has crucial contributions. This thesis aims to develop high efficiency thermoelectric nanostructured materials from the bottomup assembly of ncs. Understanding the asymmetrical thermoelectric performance for. The efficiency of a thermoelectric material is defined by the dimensionless figure of merit zt s 2.
Nanostructured thermoelectric materials with improved. Cooling devices that use these materials have produced hightemperature differences of 86, 106, and 119c with hotside temperatures set at 50, 100, and 150c, respectively. Thermoelectric material is worlds best at converting heat. Improved thermoelectric performances of srtio 3 ceramic. Nanostructured materials and thermoelectrics have been the subject of signi cant research in recent years 5, and it is a challenging topic combining materials science, nanoscience and physics. Nanostructured thermoelectric materials and devices download pdf info. Mar, 2009 ntype skutterudites inxceyco4sb12 with in situ forming nanostructured insb phase have been prepared by a meltquenchannealspark plasma sintering method. We fabricated the samples of pbte2% mgte doped with 4% na and pbte doped with 0. Highperformance nanostructured thermoelectric materials jingfeng li1, weishu liu 1,2, lidong zhao1,2 and min zhou1,3 tsinghua university, china thermoelectric eff ects enable direct conversion between thermal and electrical energy and provide an alternative route for. Compared with traditional zonemelting method used for fabricating bismuth telluride alloys, new powderbased processes have more freedom for manipulating nanostructures and nanocomposites. Over the past ten years, the exploration of high performance thermoelectric materials has attracted great attention from both an academic research perspective and with a view to industrial. Of various types of thermoelectric materials, nanostructured materials have shown the most promise for commercial use because of their extraordinary thermoelectric performances. Towards high performance nanostructured thermoelectric.
This paper presents experiments on the power and efficiency characteristics of lowand midtemperature. Thermoelectric te materials facilitate direct heattoelectricity conversion. High values of thermoelectric figures of merit zt, ranging from zt1. Us6605772b2 nanostructured thermoelectric materials and. S h yang 1, t j zhu 1, t sun 2, j he 3, s n zhang 1 and x b zhao 1. Doping with pbcl2, excess pb, and bi gives ntype behavior without significantly perturbing the cation sublattice. Thus, despite the great extent of dissolution of pbs in pbse, the transport properties in this system, such as carrier mobilities and. Thermoelectric modules, consisting of multiple pairs of n and ptype legs, enable converting heat into electricity and vice versa.
Embodiments of the invention provide methods of forming photovoltaic or thermoelectric materials, including photovoltaic or thermoelectric films. Ecofriendly highperformance silicide thermoelectric. Thermoelectric materials can be used as refrigerators, called thermoelectric coolers, or peltier coolers after the peltier effect that controls their operation. Recent developments in nanostructured materials for high. Zeming henanostructured thermoelectric materials with improved performance for energy conversion. High performance halfheusler thermoelectric materials with refined grains and nanoscale precipitates volume 27 issue 19 cui yu, hanhui xie, chenguang fu, tiejun zhu, xinbing zhao.
Method of producing high performance photovoltaic and thermoelectric nanostructured bulk and thin films method of producing high performance photovoltaic and thermoelectric nanostructured bulk and thin films. Highperformance nanostructured thermoelectric generators for. Metallic 1t phase mos2 nanosheets for highperformance. High performance thermoelectric materials in a wide range of temperatures are essential to broaden the application spectrum of thermoelectric devices. Computational strategies for design and discovery of. Apr 12, 2016 more and more attentions have been paid to the bulk nanostructured thermoelectric materials due to their high thermoelectric performances 15. Understanding the asymmetrical thermoelectric performance. Rationally designing highperformance bulk thermoelectric. However, the thermoelectric performance is often asymmetrical, in that one type outperforms the other. Thermoelectric energy conversion using nanostructured materials.
High performance halfheusler thermoelectric materials. This rigorous study provides a conclusive answer for the design of defective nanostructured te materials to achieve a high te performance and a guide for the application in midtohigh temperature power generating devices. Thermoelectric conversion technology is receiving increasing attention due to the worldwide energy and environment problems, and great progress has been made in the development of high performance thermoelectric materials. Over the past ten years, the exploration of highperformance thermoelectric materials has attracted great attention from both an academic research perspective and with a view to industrial. Recent developments of highperformance nanostructured thermoelectric te materials show that these materials have much higher conversion efficiencies than the stateoftheart sota thermoelectrics. A teg is fabricated using highefficiency nanostructured thermoelectric materials. Improved thermoelectric performances of srtio 3 ceramic doped. Recent developments in nanostructured materials for highperformance thermoelectrics article accepted version vaqueiro, p. Thermoelectric power generation modules assembled using the tifsbased high performance n and p type materials show the largest thermoelectric conversion efficiency of 5. Professor zhifeng ren abstract solidstate cooling and power generation based on thermoelectric effects are attractive for a wide range of applications in power generation, waste heat recovery, airconditioning, and refrigeration.
Although graphene exhibits advantage as a highperformance thermoelectric material, more efforts in simulations and experiments need to be. Thermoelectric properties of ptype nanostructured bismuth antimony tellurium alloyed bulk materials by yi ma advisor. Recent progress in nanostructured thermoelectric materials. Thermoelectric materials that can generate electricity from waste heat will play an important role in the global sustainable energy solution. We begin with the fundamental stratagem of achieving the greatest thermoelectric figure of merit zt of a. Thermoelectric materials have drawn tremendous attention in the past two decades because they can enable devices that can harvest waste heat and convert it to electrical power thereby promising to improve the efficiency of fuel utilization. The thermoelectric performance can be further enhanced by a cellular nanostructure with ultrathin si2te3 nanosheets covering the sb2si2te6 grains. They built a device that could generate a temperature difference of up to 90 kelvin when coupled with a commercially available ptype material. Nanostructured thermoelectric materials springerlink. Pdf energy transport in nanostructures differs significantly from macrostructures because of classical and. In this work, we studied the thermoelectric properties of nanostructured snte with different dopants, and found indiumdoped snte showed extraordinarily large seebeck.
Bismuth sulfide bi 2 s 3 polycrystalline bulks with a high relative density 90% were fabricated by combining mechanical alloying ma and spark plasma sintering sps. Toward highperformance nanostructured thermoelectric materials. The nanostructured insb phase has a strong influence on phonon scattering and leads to a notable suppression of the lattice thermal conductivity of inxceyco4sb12. Toward highperformance nanostructured thermoelectric. Another challenge in the preparation of bulk nanostructured materials is to obtain a dense solid. To achieve this, i have developed different approaches with the purpose to enhance the transport properties of the materials and to. High performance halfheusler thermoelectric materials with. High performance inxceyco4sb12 thermoelectric materials with in situ forming nanostructured insb phase. Quantumdot superlattice qlsl structures having improved thermoelectric properties are described. This article focuses on the potential of the new thermoelectric materials with extraordinary performance in being implemented in thermoelectric modules specifically for power generation organic materials and their devices fall out of scope because efficiencies are still too low.
Exploring nanostructured thermoelectric materials is not only useful searching for the next generation of thermoelectric materials exceeding zt2. High performance inxceyco4sb12 thermoelectric materials with. Kimdesign and preparation of highperformance bulk thermoelectric. More and more attentions have been paid to the bulk nanostructured thermoelectric materials due to their high thermoelectric performances 15. Highperformance nanostructured thermoelectric materials. Thermoelectric energy conversion technique has been used as the power supply for the deepspace exploring missions, now showing notable advantages to harvest the widely distributed waste heat and convert the abundant solar energy into electricity. The production of suitable thermoelectric te materials require high seebeck coefficient s and electrical. Thermoelectric energy conversion using nanostructured. Hua ge shenzhen key laboratory of thermoelectric materials, department of physics, south university of science and technology of china, shenzhen, 518055 china.
Critical role of atomicscale defect disorders for high. The main advantages of a peltier cooler compared to a vaporcompression refrigerator are its lack of moving parts or. Recent advances in highperformance bulk thermoelectric materials. From an environmental perspective, leadfree snte would be preferable for solidstate waste heat recovery if its thermoelectric figureofmerit could be brought close to that of the leadcontaining chalcogenides. The production of suitable thermoelectric te materials require high seebeck coefficient s and. Dyckc and clemens burdaa received 20th april 2011, accepted 11th july 2011 doi. Performance thermoelectricity in nanostructured earth. Northwestern university scientists have developed a thermoelectric material that is the best in the world at converting waste heat to electricity. Currently available thermoelectric devices for cooling rely on expensive bismuth telluride. Dyckc and clemens burdaa received 20th april 2011, accepted 11th july 2011. High performance inxceyco4sb12 thermoelectric materials.
Aug, 20 good thermoelectric te materials should not only have high figureofmerit z, but also be environmentally friendly and costeffective 1. Similarly, bulk nanostructured materials and nanoscale complex materials exhibited enhanced thermoelectric performance 9,10. Novel nanostructured highperformance thermoelectric. In case of nanostructured thermoelectric materials, lattice thermal conductivity is mainly reduced by the phononelectron scattering mechanism which promotes the scattering of long wavelength heatcarrying phonons. Thermoelectric te energy conversion, which can achieve the direct and reversible conversion between heat and electricity, provides for a wide range of applications in the area of wasteheat recovery, refrigeration and high precision temperature control 1,2. Critical role of atomicscale defect disorders for highperformance nanostructured halfheusler thermoelectric alloys and. Nanostructures in highperformance gete x agsbte 2 100. We report promising thermoelectric properties of the rock salt pbsepbs system which consists of chemical elements with high natural abundance. Of various types of thermoelectric materials, nanostructured materials have shown the most. Highperformance nanostructured thermoelectric materials jingfeng li1, weishu liu 1,2, lidong zhao1,2 and min zhou1,3 tsinghua university, china thermoelectric eff ects enable direct conversion between thermal and electrical energy and provide an alternative route for power generation and refrigeration.
This quest has been mainly fueled by the introduction of new designs and the synthesis of new materials. Graphene nanoribbon gnr, a quasionedimensional system, which has proven to have many interesting properties such as bandgap opening 11, is a potential candidate for nanoscale thermoelectronics. The devices built from thermoelectric materials exhibit high reliability but no noise or vibration as there is none. Environmental and economic concerns have significantly spurred the search for novel, highperformance thermoelectric materials for energy conversion in smallscale power generation and refrigeration devices. Recent developments of highperformance nano structured thermoelectric te materials show that these materials have much higher conversion efficiencies than the.
Of the various types of nanostructured materials, bulk nanostructured materials haveshown the most promise for commercial use because,unlike manyother nanostructured materials, they can be fabricated in large quantities and in a form that is compatible with existing thermoelectric device con. Nanostructured thermoelectric materials and devices download pdf. Sb2si2te6, a 2d material, exhibits an intrinsically high thermoelectric figure of merit zt of. The combined effect of in and ce doping results in high performance skutterudite materials. Low dimensional materials open new routes to high performance thermoelectric properties due to their unique density of states with confined electrons and holes. There has been a renaissance of interest in exploring highly efficient thermoelectric materials as a possible route to address the worldwide energy generation, utilization, and management. Recent progress of twodimensional thermoelectric materials. This paper presents experiments on the power and efficiency characteristics of lowand midtemperature thermoelectric materials.
High thermoelectric performance by resonant dopant indium. Shenzhen key laboratory of thermoelectric materials, department of physics, south university of science and technology of china, shenzhen, 518055 china. In one embodiment, pbse x te 1x pbte qdsls are provided having enhanced values of seebeck coefficient and thermoelectric figure of merit zt relative to bulk values. Tellurium alloyed materials nanostructured bismuth. The use of nanofibers in thermoelectric devices can be potentially useful in achievement of a higher. Download fulltext pdf download fulltext pdf nanostructured highentropy materials article pdf available in journal of materials research march 2020 with 119 reads. The si2te3 acts as a holetransmitting electronblocking filter and, at the same time, causes extra phonon scattering that leads to.
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