Toward highperformance nanostructured thermoelectric materials. To date the dramatic enhancements in figure of merit in bulk nanostructured materials come from very. Recent advances in highperformance bulk thermoelectric materials. The goal of this project is to investigate the inpile performance of high efficiency nanostructured thermoelectric materials, and develop high performance and irradiationresistant thermoelectric devices for inpile power harvesting and sensing. 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. Highperformance flatpanel solar thermoelectric generators. Introduction to a great extent, the development of civilization has evolved with the technological advent of energy production, storage, delivery, and use. Novel nanostructured highperformance thermoelectric materials and devices. Thermoelectric materials promise to create additional ef. Another challenge in the preparation of bulk nanostructured materials is to obtain a dense solid. These metrics are regularly updated to reflect usage leading up to the last few days. 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 program uses unique highperformance nanostructured te materials based on halfheusler alloys, which have superior mechanical strength and durability compared to competing materials e.
This highlight discusses recent trends in the search for new high efficiency thermoelectric materials. We introduce 2d sb 2si 2te 6 as a promising new highperformance thermoelectric material. Highthermoelectric performance of nanostructured bismuth. The fundamental problem in designing new materials for thermoelectric applications lies in the interdependence of the three key properties figure 3 that determine the figureofmerit and hence performance. Thermoelectric materials promise to create additional efficiencies in energy management by harvesting the energy of waste heat and converting it to electricity. High performance ptype halfheusler thermoelectric materials junjie yu, kaiyang xia, xinbing zhao and tiejun zhu state key laboratory of silicon materials and school of materials science and engineering, zhejiang university, hangzhou 310027, peoples republic of china email. High performance halfheusler thermoelectric materials. High thermoelectric performance by resonant dopant indium in. Effect of hf concentration on thermoelectric properties of nanostructured ntype halfheusler materials hfxzr1xnisn0. These nanocrystalline bulk materials were made by hot pressing nanopowders that were ballmilled.
We report promising thermoelectric properties of the rock salt pbsepbs system which consists of chemical elements with high natural abundance. 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. The process of consolidation of the ncs into a dense solid is crucial to obtain a bulk nanomaterial with high thermoelectric properties, because the porosity strongly affects the transport properties. L arises from enhanced phonon scattering by interfaces in a nanoscale system. The seebeck coefficient is an intrinsic property of the materials related to their electronic properties and independent of their geometry.
Thermoelectric te materials facilitate direct heattoelectricity conversion. Good thermoelectric materials show a low thermal conductivity of 23 w m k. This discovery sets the stage for use of a new nanocomposite approach in developing highperformance lowcost bulk thermoelectric materials. The thermoelectrics field has seen remarkable progress in improving thermoelectric properties due to the recently gained ability to create nanostructured materials such as superlattices, 14 quantum dots, 15 nanowires, 16,17 and nanocomposites.
Thermoelectric energy conversion using nanostructured. Shenzhen key laboratory of thermoelectric materials, department of physics, south university of science and technology of china, shenzhen, 518055 china. Article highperformance thermoelectrics from cellular nanostructured sb2si2te6 sb 2si 2te 6, a 2d material, exhibits an intrinsically high thermoelectric. Oct 21, 2010 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. Recent developments in nanostructured materials for high. Dyckc and clemens burdaa received 20th april 2011, accepted 11th july 2011 doi. Thermoelectric te materials have the capability of converting heat into electricity, which can improve fuel efficiency, as well as providing robust alternative energy supply in multiple applications by collecting wasted heat, and therefore, assisting in finding new energy solutions. Presently, bi 2 te 3 and pdte are the conventional thermoelectric materials with zt about 1. Recent advances in highperformance bulk thermoelectric. Nanostructured thermoelectric materials springerlink. The main advantages of a peltier cooler compared to a vaporcompression refrigerator are its lack of moving parts or. In one embodiment, the invention provides a method of forming a photovoltaic material, the method comprising.
Mar, 2009 ntype skutterudites inxceyco4sb12 with in situ forming nanostructured insb phase have been prepared by a meltquenchannealspark plasma sintering method. Thus, despite the great extent of dissolution of pbs in pbse, the transport properties in this system, such as carrier mobilities. Materials with low thermal conductivity and high electrical conductivity is required to get high zt or higher efficiency of the material. 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. Hua ge shenzhen key laboratory of thermoelectric materials, department of physics, south university of science and technology of china, shenzhen, 518055 china. Computational strategies for design and discovery of. Aug, 20 good thermoelectric te materials should not only have high figureofmerit z, but also be environmentally friendly and costeffective 1. Nanostructured chalcogenide materials for high performance thermoelectrics tem seebeck coefficient electrical conductivity power factor gixrd 200 nm 100 nm100 nm morphology thermoelectric characteristics p type material properties with sub stoichiometric ag concentrations. Thermoelectric materials can be used as refrigerators, called thermoelectric coolers, or peltier coolers after the peltier effect that controls their operation.
Towards high performance nanostructured thermoelectric. Nanostructured thermoelectric materials are materials that contain nanoscale constituents and exhibit enhanced thermoelectric performance due to nanoscale phenomena. High performance thermoelectric materials in a wide range of temperatures are essential to broaden the application spectrum of thermoelectric devices. Exploring nanostructured thermoelectric materials is not only useful searching for the next generation of thermoelectric materials exceeding zt2. Composite thermoelectric materials with embedded nanoparticles. It can also be defined as the electric potential difference or the generated thermovoltage created by a.
The maximum thermoelectric figureofmerit, zt, is 0. Highperformance nanostructured thermoelectric materials. Chena received 16th december 2008, accepted 5th february 2009 first published as an advance article on the web 27th february 2009 doi. Embodiments of the invention provide methods of forming photovoltaic or thermoelectric materials, including photovoltaic or thermoelectric films. Such applications often require materials manufacturing at large scale and low cost. To model the experimental results, the temperaturedependent properties of the ptype and ntype elements were used. This paper presents experiments on the power and efficiency characteristics of lowand midtemperature thermoelectric.
This paper presents experiments on the power and efficiency characteristics of lowand midtemperature thermoelectric materials. The thermoelectric community is widely targeting zt. Towards high performance nanostructured thermoelectric materials. 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. S h yang 1, t j zhu 1, t sun 2, j he 3, s n zhang 1 and x b zhao 1. Highperformance thermoelectrics from cellular nanostructured. The design and fabrication of nanostructured materials to control both thermal and electrical properties are demonstrated for highperformance thermoelectric conversion. L, over that of the corresponding bulk crystalline phase, is the principal contributor to the enhanced thermoelectric performance of a nanostructured material. Request pdf highperformance nanostructured thermoelectric materials thermoelectric effects enable direct conversion between thermal and electrical energy and provide an alternative route for. The device is surrounded by a glass enclosure maintaining an evacuated environment. High performance thermoelectrics from earthabundant materials.
Toward highperformance nanostructured thermoelectric. High performance inxceyco4sb12 thermoelectric materials with. There is no easy way to increase zt due to the interrelated parameters s. Recent progress in nanostructured thermoelectric materials. To achieve this, i have developed different approaches with the purpose to enhance the transport properties of the materials and to overcome the limitations of solution processed ncs. Request pdf highperformance nanostructured thermoelectric materials thermoelectric effects enable direct conversion between thermal and. Proceedings of the asme 2011 international mechanical engineering congress and exposition. The developed solar thermoelectric generators stegs achieved a peak ef. 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. Good thermoelectric te materials should not only have high figureofmerit z, but also be environmentally friendly and costeffective 1. The nondimensional figureofmerit zt is defined as zt s 2. In the first part of this talk, i will discuss the manufacturing of nanostructured bulk thermoelectric materials at large scale with improved thermoelectric.
The nanostructured insb phase has a strong influence on phonon scattering and. Thermoelectric energy conversion using nanostructured materials. The structures can be combined into multichip devices to provide additional thermoelectric. Highperformance thermoelectric devices based on abundant silicide materials for vehicle waste heat recovery author. Nanostructures in highperformance gete x agsbte 2 100. Quantumdot superlattice qlsl structures having improved thermoelectric properties are described.
Highperformance nanostructured thermoelectric materials free download as pdf file. The dimensionless thermoelectric figure of merit zt in bismuth antimony telluride bisbte bulk alloys has remained around 1 for more than 50 years. Materials or advanced sensors for nuclear applications abstract. High performance halfheusler thermoelectric materials with. Atila herms department of electronics university of barcelona. Nanostructured thermoelectric materials with improved. 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. Jan 15, 2020 thermoelectric materials promise to create additional efficiencies in energy management by harvesting the energy of waste heat and converting it to electricity. The ksbte 2pbte m system represents a family of stable nanostructured thermoelectric materials with very low thermal conductivity, high seebeck coefficient, and a figure of merit of merit zt. Towards high performance nanostructured thermoelectric materials a bottomup approach thesis by doris cadavid in partial fulfilment of the requirements for the degree of doctor of philosophy supervisor prof. Published 12 may 2008 iop publishing ltd nanotechnology, volume 19, number 24. Performance thermoelectricity in nanostructured earth. High performance inxceyco4sb12 thermoelectric materials.
Nanostructure approach for highperformance thermoelectrics, photovoltaics, and biosensing z. Nanostructured hightemperature bulk thermoelectric. High performance ptype halfheusler thermoelectric materials. Doping of in results in a nanostructured insb phase with the grain size of 1080 nm that is evenly distributed on the boundaries of the skutterudite matrix. Highperformance nanostructured thermoelectric materials and. Thermoelectric materials an overview sciencedirect topics. This increase in zt shows the possibility of the preparation of highly efficient thermoelectric materials by chemical synthesis. Novel nanostructured highperformance thermoelectric. For such hotside temperatures, nanostructured bi2te3based materials are excellent candidates. Typical conductivity of thermoelectric materials is 500 s cm. High thermoelectric performance by resonant dopant indium.
Doping with pbcl2, excess pb, and bi gives ntype behavior without significantly perturbing the cation sublattice. As a refrigeration technology, peltier cooling is far less common than vaporcompression refrigeration. The key phenomenon to generate thermoelectric effect is seebeck effect, where electricity generates due to temperature differences. Nanostructure design for drastic reduction of thermal. Thus, despite the great extent of dissolution of pbs in pbse, the transport properties in this system, such as carrier mobilities and. Us6605772b2 nanostructured thermoelectric materials and. Development of high performance nanostructured bi, sb. 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. Thermoelectric materials offer considerable attractions in the pursuit of a more efficient use of existing energy resources, as they may be used to construct powergeneration devices that allow useful elect. We used properties of nanostructured thermoelectric ptype and ntype bi2te3based alloys we reported before in the. The goal of this project is to investigate the inpile performance of highefficiency nanostructured thermoelectric materials, and develop highperformance and irradiationresistant thermoelectric devices for inpile power harvesting and sensing. The performance of a te material is characterised by its figure of merit zt s 2.
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