Download or read book Thermoelectric Transport and Energy Conversion Using Novel 2D Materials written by Luke J. Wirth and published by . This book was released on 2016 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials hold great promise for applications in thermal management and thermoelectric power generation. Defects in these are important as they are generally inevitably introduced during fabrication or intentionally engineered to control the properties of the nanomaterials. Here, we investigate how phonon-contributed thermal conductance in narrow graphene, boron nitride (BN), and silicene nanoribbons (NRs), responds to the presence of a vacancy defect and the corresponding geometric distortion, from first principles using the non-equilibrium Green's function method. Analyses are made of the geometries, phonon conductance coefficients, and local densities of states (LDOS) of pristine and defected nanoribbons. It is found that hydrogen absences produce similar reductions in thermal conductance in planar graphene and BN NRs with greater reductions in buckled silicene NRs. Vacancies of larger atoms affect all systems similarly, causing greater reductions than hydrogen absences. Emerging flexible and stiff scattering centers, depending on bond strengths, are shown to cause thermal conductance reduction by changing nearby LDOSs in defected structures relative to pristine ones. This knowledge suggests that inferences on unknown thermal properties of novel defected materials can be made based on understanding how thermal transport behaves in their analogues and how bond characteristics differ between systems under consideration. The thermal conductance contributed by phonons is often a limiting factor to the overall suitability of a material for use in thermoelectric power generation, wherein a voltage is generated in a material by a temperature gradient. The thermoelectric figure of merit (ZT) assesses this suitability, in part based on a ratio of electrical conductance to thermal conductance. These two properties can be decoupled in low-dimensional structures like NRs, with lower thermal conductances generally found in narrower materials. Here, ZT is analyzed in graphene, BN, and silicene nanoribbons of two different widths with engineered edges that are designed to increase the ratio of edge length to NR length. This could conceivably be synthesized by either top-down or bottom-up methods. Analyses are made of how width and material change the maximum ZT attainable by controlling the chemical potential of each system, how these maximum ZTs differ in each system as a result of p- or n- type change to chemical potential, how full-width half-maximum values of ZT peaks behave, and how the different factors of ZT affect its final value in these systems. A very high ZT of 6.26 is reported near the bandgap in the narrow chevron silicene NR at room temperature, and a room temperature ZT greater than 3 is also found in the narrow BN NR, suggesting that edge-engineered NRs offer high promise for thermoelectric applications and may be suitable for emissions-free electricity generation from waste heat sources.

Download or read book Calculation and Design of Two dimensional Thermoelectric and Piezoelectric Materials written by San-Dong Guo and published by Frontiers Media SA. This book was released on 2023-08-25 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fascinating two-dimensional (2D) materials are being unconsciously applied in various fields from science to engineering, which is benefited from the glamorous physical and chemical properties of mechanics, optics, electronics, and magnetism. The representative 2D thermoelectric/piezoelectric materials can directly convert thermal/mechanical energy into electrical energy, which can resolve the energy issues and avoid further environmental deterioration. The thermoelectric or piezoelectric properties of various 2D materials, such as graphene, hexagonal boron nitride, black phosphorus, transition metal dichalcogenides (TMDs), arsenene, metal carbides and nitrides (MXenes), and so on, have been investigated in detail. Although tremendous progress has been achieved in the past few years, these properties still need to be improved for their practical application by designing new 2D materials, strain engineering, chemical functionalization, etc. In addition to this, in 2D materials, there are many other novel physical properties, such as magnetism, topology, valley, and so on. The combination of thermoelectricity/piezoelectricity with other unique properties may lead to novel device applications or scientific breakthroughs in new physics. Overall, the emergence of 2D thermoelectric and piezoelectric materials has expanded energy conversion research dramatically. By combing this new device concept with the novel 2D materials, original devices should have potential applications in energy harvesting.

Download or read book 2d Materials Energy Storage Conversion written by Ganguly PILLAI and published by . This book was released on 2021-07-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Physics of Thermoelectric Energy Conversion written by Julian Goldsmid and published by Morgan & Claypool Publishers. This book was released on 2017-05-02 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book outlines the principles of thermoelectric generation and refrigeration from the discovery of the Seebeck and Peltier effects in the nineteenth century through the introduction of semiconductor thermoelements in the mid-twentieth century to the more recent development of nanostructured materials. It is shown that the efficiency of a thermoelectric generator and the coefficient of performance of a thermoelectric refrigerator can be related to a quantity known as the figure of merit. The figure of merit depends on the Seebeck coefficient and the ratio of the electrical to thermal conductivity. It is shown that expressions for these parameters can be derived from the band theory of solids. The conditions for favourable electronic properties are discussed. The methods for selecting materials with a low lattice thermal conductivity are outlined and the ways in which the scattering of phonons can be enhanced are described. The application of these principles is demonstrated for specific materials including the bismuth telluride alloys, bismuth antimony, alloys based on lead telluride, silicon-germanium and materials described as phonon-glass electron-crystals. It is shown that there can be advantages in using the less familiar transverse thermoelectric effects and the transverse thermomagnetic effects. Finally, practical aspects of thermoelectric generation and refrigeration are discussed. The book is aimed at readers who do not have a specialised knowledge of solid state physics.

Download or read book Thermoelectric Materials and Devices written by Lidong Chen and published by Elsevier. This book was released on 2020-09-25 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoelectric Materials and Devices summarizes the latest research achievements over the past 20 years of thermoelectric material and devices, most notably including new theory and strategies of thermoelectric materials design and the new technology of device integration. The book's author has provided a bridge between the knowledge of basic physical/chemical principles and the fabrication technology of thermoelectric materials and devices, providing readers with research and development strategies for high performance thermoelectric materials and devices. It will be a vital resource for graduate students, researchers and technologists working in the field of energy conversion and the development of thermoelectric devices. Discusses the new theory and methods of thermoelectric materials design Combines scientific principles, along with synthesis and fabrication technologies in thermoelectric materials Presents the design optimization and interface technology for thermoelectric devices Introduces thermoelectric polymers and organic-inorganic thermoelectric composites

Download or read book Thermoelectric Energy Conversion written by Ryoji Funahashi and published by Woodhead Publishing. This book was released on 2021-02-05 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoelectric Energy Conversion: Theories and Mechanisms, Materials, Devices, and Applications provides readers with foundational knowledge on key aspects of thermoelectric conversion and reviews future prospects. Sections cover the basic theories and mechanisms of thermoelectric physics, the chemical and physical aspects of classical to brand-new materials, measurement techniques of thermoelectric conversion properties from the materials to modules and current research, including the physics, crystallography and chemistry aspects of processing to produce thermoelectric devices. Finally, the book discusses thermoelectric conversion applications, including cooling, generation, energy harvesting, space, sensor and other emerging areas of applications. Reviews key applications of thermoelectric energy conversion, including cooling, power generation, energy harvesting, and applications for space and sensing Discusses a wide range of materials, including skutterudites, heusler materials, chalcogenides, oxides, low dimensional materials, and organic materials Provides the fundamentals of thermoelectric energy conversion, including the physics, phonon conduction, electronic correlation, magneto-seebeck theories, topological insulators and thermionics

Download or read book 2D Materials for Energy Storage and Conversion written by Suresh C. Pillai and published by IOP Publishing Limited. This book was released on 2021-11-28 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference text provides a comprehensive overview of the latest developments in 2D materials for energy storage and conversion. It covers a wide range of 2D materials and energy applications, including 2D heterostructures for hydrogen storage applications, cathode and anode materials for lithium and sodium-ion batteries, ultrafast lithium and sodium-ion batteries, MXenes for improved electrochemical applications and MXenes as solid-state asymmetric supercapacitors. 2D Materials for Energy Storage and Conversion is an invaluable reference for researchers and graduate students working with 2D materials for energy storage and conversion in the fields of nanotechnology, electrochemistry, materials chemistry, materials engineering and chemical engineering. Key Features: Provides a comprehensive overview of the latest developments in 2D materials for energy storage and conversion technologies Covers the most promising candidates for radically advanced energy storage Covers 2D heterostructures and provides a holistic view of the subject Includes 2D materials beyond graphene, defects engineering, and the main challenges in the field

Download or read book Two dimensional Materials written by Pramoda Kumar Nayak and published by BoD – Books on Demand. This book was released on 2016-08-31 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are only a few discoveries and new technologies in materials science that have the potential to dramatically alter and revolutionize our material world. Discovery of two-dimensional (2D) materials, the thinnest form of materials to ever occur in nature, is one of them. After isolation of graphene from graphite in 2004, a whole other class of atomically thin materials, dominated by surface effects and showing completely unexpected and extraordinary properties, has been created. This book provides a comprehensive view and state-of-the-art knowledge about 2D materials such as graphene, hexagonal boron nitride (h-BN), transition metal dichalcogenides (TMD) and so on. It consists of 11 chapters contributed by a team of experts in this exciting field and provides latest synthesis techniques of 2D materials, characterization and their potential applications in energy conservation, electronics, optoelectronics and biotechnology.

Download or read book The Physics of Thermoelectric Energy Conversion written by H. J. Goldsmid and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book outlines the principles of thermoelectric generation and refrigeration from the discovery of the Seebeck and Peltier effects in the 19th century through the introduction of semiconductor thermoelements in the mid-20th century to the more recent development of nanostructured materials. The conditions for favourable electronic properties are discussed. The methods for selecting materials with a low lattice thermal conductivity are outlined and the ways in which the scattering of phonons can be enhanced are described. The book is aimed at readers without specialised knowledge.

Download or read book Thermoelectricity and Heat Transport in Graphene and Other 2D Nanomaterials written by Serhii Shafraniuk and published by Elsevier. This book was released on 2017-07-15 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoelectricity and Heat Transport in Graphene and Other 2D Nanomaterials describes thermoelectric phenomena and thermal transport in graphene and other 2-dimentional nanomaterials and devices. Graphene, which is an example of an atomic monolayered material, has become the most important growth area in materials science research, stimulating an interest in other atomic monolayeric materials. The book analyses flow management, measurement of the local temperature at the nanoscale level and thermoelectric transducers, with reference to both graphene and other 2D nanomaterials. The book covers in detail the mechanisms of thermoelectricity, thermal transport, interface phenomena, quantum dots, non-equilibrium states, scattering and dissipation, as well as coherent transport in low-dimensional junctions in graphene and its allotropes, transition metal dichalcogenides and boron nitride. This book aims to show readers how to improve thermoelectric transducer efficiency in graphene and other nanomaterials. The book describes basic ingredients of such activity, allowing readers to gain a greater understanding of fundamental issues related to the heat transport and the thermoelectric phenomena of nanomaterials. It contains a thorough analysis and comparison between theory and experiments, complemented with a variety of practical examples. Shows readers how to improve the efficiency of heat transfer in graphene and other nanomaterials with analysis of different methodologies Includes fundamental information on the thermoelectric properties of graphene and other atomic monolayers, providing a valuable reference source for materials scientists and engineers Covers the important models of thermoelectric phenomena and thermal transport in the 2D nanomaterials and nanodevices, allowing readers to gain a greater understanding of the factors behind the efficiency of heat transport in a variety of nanomaterials

Download or read book Thermoelectricity and Advanced Thermoelectric Materials written by Ranjan Kumar and published by Woodhead Publishing. This book was released on 2021-06-03 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoelectricity and Advanced Thermoelectric Materials reviews emerging thermoelectric materials, including skutterudites, clathrates, and half-Heusler alloys. In addition, the book discusses a number of oxides and silicides that have promising thermoelectric properties. Because 2D materials with high figures of merit have emerged as promising candidates for thermoelectric applications, this book presents an updated introduction to the field of thermoelectric materials, including recent advances in materials synthesis, device modeling, and design. Finally, the book addresses the theoretical difficulties and methodologies of computing the thermoelectric properties of materials that can be used to understand and predict highly efficient thermoelectric materials. This book is a key reference for materials scientists, physicists, and engineers in energy. Reviews the most relevant, emerging thermoelectric materials, including 2D materials, skutterudites, clathrates and half-Heusler alloys Focuses on how electronic structure engineering can lead to improved materials performance for thermoelectric energy conversion applications Includes the latest advances in the synthesis, modeling and design of advanced thermoelectric materials

Download or read book Thermoelectric Materials written by Enrique Macia and published by CRC Press. This book was released on 2015-05-05 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental and economic concerns have significantly spurred the search for novel, high-performance thermoelectric materials for energy conversion in small-scale power generation and refrigeration devices. This quest has been mainly fueled by the introduction of new designs and the synthesis of new materials. In fact, good thermoelectric material

Download or read book Materials for Energy Conversion Devices written by C C Sorrell and published by Elsevier. This book was released on 2005-10-30 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the finite capacity and pollution problems of fossil fuels grow more pressing, new sources of more sustainable energy are being developed. Materials for energy conversion devices summarises the key research on new materials which can be used to generate clean and renewable energy or to help manage problems from existing energy sources.The book discusses the range of materials that can be used to harness and convert solar energy in particular, including the properties of oxide materials and their use in producing hydrogen fuel. It covers thermoelectric materials and devices for power generation, ionic conductors and new types of fuel cell. There are also chapters on the use of such materials in the immobilisation of nuclear waste and as electrochemical gas sensors for emission control.With its distinguished editors and international team of contributors, Materials for energy conversion devices is a standard reference for all those researching and developing a new generation of materials and technologies for our energy need. Detailed coverage of solar energy and thermoelectric conversion Comprehensive survey of new developments in this exciting field Edited by leading experts in the field with contributions from an international team of authors

Download or read book 2D Semiconducting Materials for Electronic Photonic and Optoelectronic Devices written by Anuj Kumar and published by CRC Press. This book was released on 2024-11-07 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional semiconducting materials (2D-SCMs) are the subject of intensive study in the fields of photonics and optoelectronics because of their unusual optical, electrical, thermal, and mechanical properties. The main objective of 2D Semiconducting Materials for Electronic, Photonic, and Optoelectronic Devices is to provide current, state-of-the-art knowledge of two-dimensional semiconducting materials for various applications. Two-dimensional semiconducting materials are the basic building blocks for making photodiodes, light-emitting diodes, light-detecting devices, data storage, telecommunications, and energy-storage devices. When it comes to two-dimensional semiconducting materials, electronic, photonic, and optoelectronic applications, as well as future plans for improving performance, no modern book covers as much ground. The planned book will fill such gaps by offering a comprehensive analysis of two-dimensional semiconducting materials. This book covers a range of advanced 2D materials, their fundamentals, and the chemistry for many emerging applications. All the chapters are covered by experts in these areas around the world, making this a suitable textbook for students and providing new guidelines to researchers and industries. • Covers topics such as fundamentals and advanced knowledge of two-dimensional semiconducting materials • Provides details about the recent methods used for the synthesis, characterization, and applications of two-dimensional semiconducting materials • Covers the state-of-the-art development in two-dimensional semiconducting materials and their emerging applications This book provides directions to students, scientists, and researchers in semiconductors and related disciplines to help them better understand the physics, characteristics, and applications of 2D semiconductors.

Download or read book Inorganic Two dimensional Nanomaterials written by Changzheng Wu and published by Royal Society of Chemistry. This book was released on 2017-08-22 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inorganic Two-Dimensional Nanomaterials provides an overview of the development on inorganic two-dimensional nanomaterials from computational simulation and theoretical understanding to applications in energy conversion and storage.

Download or read book Thermal Energy Conversion Utilizing Magnetization Dynamics and Two carrier Effects written by Sarah J. Watzman and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of the world’s energy comes from nonrenewable sources, with over 60% rejected as waste-heat. If waste-heat could be recovered, the effect on humanity would be equivalent to that of adding a renewable energy source, majorly increasing society’s energy conversion efficiency. This can be accomplished through the use of thermoelectric materials, which convert a temperature gradient (like that from waste-heat) into a usable voltage output. Conventional thermoelectric materials have not increased in commercial efficiency in recent years, therefore a different approach is taken in this dissertation. Here, metals are explored as thermoelectric materials despite having a low thermoelectric efficiency. Magnon drag, an advective process utilizing magnetization dynamics in a temperature gradient to pull charge carriers through a crystal lattice, is shown to dominate thermoelectric transport in ferromagnetic transition metals. Experimental comparison with theory offers a pathway for increasing the thermoelectric efficiency in metals by increasing their magnon-drag thermopower. Additionally, novel transport is explored in the recently experimentally-realized class of materials called Weyl semimetals, where tuning the electronic band structure gives unique topological transport signatures. Predicted to have large transverse transport coefficients, NbP is experimentally proven to effectively convert a temperature gradient into a perpendicular output voltage via the Nernst effect. Transverse thermoelectric devices have technological advantages over conventional Peltier or Seebeck longitudinal modules (in which the applied temperature gradient is parallel to the output voltage), but they require an externally applied magnetic field. Further control over the band structure in Weyl semimetals offers a solution, where YbMnBi2 is experimentally predicted to effectively utilize a transverse geometry without the need for an external magnetic field. This effect is predicted to arise from the Berry curvature of the electronic band structure, which functions like an internal magnetic field. The novel and unique signatures of Weyl semimetals indicate their strong potential as candidate materials for thermoelectric energy generation and cooling.

Download or read book Materials Aspect of Thermoelectricity written by Ctirad Uher and published by CRC Press. This book was released on 2016-11-25 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, novel families of materials have been discovered and significant improvements in classical thermoelectric materials have been made. Thermoelectric generators are now being used to harvest industrial heat waste and convert it into electricity. This is being utilized in communal incinerators, large smelters, and cement plants. Leading car and truck companies are developing thermoelectric power generators to collect heat from the exhaust systems of gasoline and diesel engines. Additionally, thermoelectric coolers are being used in a variety of picnic boxes, vessels used to transport transplant organs, and in air-conditioned seats of mid-size cars. Consisting of twenty-one chapters written by top researchers in the field, this book explores the major advancements being made in the material aspects of thermoelectricity and provides a critical assessment in regards to the broadening of application opportunities for thermoelectric energy conversion.