June 16, 2021

Download Ebook Free Dielectric Polymer Materials For High-Density Energy Storage

Dielectric Polymer Materials for High-Density Energy Storage

Dielectric Polymer Materials for High-Density Energy Storage
Author : Zhi-Min Dang
Publisher : William Andrew
Release Date : 2018-06-13
Category : Technology & Engineering
Total pages :500
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Dielectric Polymer Materials for High-Density Energy Storage begins by introducing the fundamentals and basic theories on the dielectric behavior of material. It then discusses key issues on the design and preparation of dielectric polymer materials with strong energy storage properties, including their characterization, properties and manipulation. The latest methods, techniques and applications are explained in detail regarding this rapidly developing area. The book will support the work of academic researchers and graduate students, as well as engineers and materials scientists working in industrial research and development. In addition, it will be highly valuable to those directly involved in the fabrication of capacitors in industry, and to researchers across the areas of materials science, polymer science, materials chemistry, and nanomaterials. Focuses on how to design and prepare dielectric polymer materials with strong energy storage properties Includes new techniques for adjusting the properties of dielectric polymer materials Presents a thorough review of the state-of-the-art in the field of dielectric polymer materials, providing valuable insights into potential avenues of development

Polymers and Multicomponent Polymeric Systems

Polymers and Multicomponent Polymeric Systems
Author : Jose James,Pramoda Kumari Pallathadka,Sabu Thomas
Publisher : CRC Press
Release Date : 2019-12-06
Category : Science
Total pages :312
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In recent years, multicomponent polymers have generated much interest due to their excellent properties, unique morphology and high-end applications. Book focusses on thermal, thermo-mechanical and dielectric analysis of polymers and multicomponent polymeric systems like blends, interpenetrating polymeric networks (IPNs), gels, polymer composites, nanocomposites. Through these analyses, it provides an insight into the stability of polymer systems as a function of time, processing and usage. Aimed at polymer chemists, physicists and engineers, it also covers ASTM /ISO and other standards of various measurement techniques for systematic analysis in materials science.

Smart Structures and Materials 2004

Smart Structures and Materials 2004
Author : Yoseph Bar-Cohen
Publisher : Society of Photo Optical
Release Date : 2004
Category : Technology & Engineering
Total pages :556
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Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.

High Energy Density, and Low Loss Polymer Dielectrics for Energy Storage Capacitors and Organic Electronics

High Energy Density, and Low Loss Polymer Dielectrics for Energy Storage Capacitors and Organic Electronics
Author : Shan Wu
Publisher : Unknown
Release Date : 2014
Category :
Total pages :129
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Electrical energy storage devices are among the most important components for a broad range of applications in modern electronics and electrical power systems such as hybrid electric vehicles (HEV), medical defibrillators, filters, and switched-mode power supplies. Due to these applications, electrical energy storage devices have been growing rapidly in recent years. Desired properties of the dielectrics for energy storage include high electric energy density, high charge-discharge efficiency, high electric breakdown, and high operation temperature. Compared with ceramic capacitors, polymer thin film capacitors are inexpensive, possess high dielectric strength, high energy density and low dielectric loss, and fail gracefully. The continuous miniaturization and increased functionality in modern electronics and electric power systems demand further increases in energy and power density of dielectric materials since these capacitors contribute significant (>30%) volume and weight to systems. One major challenge in developing dielectric polymers is realizing high energy density while maintaining low dielectric loss, even when high electric fields are applied. The traditional dielectric polymers have a relatively low dielectric constant around 2-3, and the energy density is limited to below 5 J/cm3. Recently, PVDF (polyvinylidene fluoride) based dielectric polymers such as P(VDF-CTFE) (CTFE: chlorotrifluoroethylene) and P(VDF-HFP) (HFP: hexafluoropropylene) have been studied and demonstrated to achieve very high energy densities (>25 J/cm3). Unfortunately, it is still a challenge to reduce the ferroelectric loss in PVDF based polymers by the strongly coupled dipoles and the high electric field conduction loss. Two approaches are introduced in this dissertation on how to develop the next generation polymer dielectrics with high energy density, low loss, high breakdown strength, and high temperature stability. The first approach is modification of high K polymer dielectrics to reduce the ferroelectric loss and conduction loss. The second approach is start from intrinsically low loss materials, then enhance the dielectric properties by increasing the dipole moment and dipole density.A polar-fluoropolymer blend consisting of a high energy density P(VDF-CTFE) and a low dielectric loss poly(ethylene-chlorotrifluoroethylene) (ECTFE) was developed. Both the blend and crosslinked blend films exhibit a dielectric constant of 7 and low loss (1%), as expected from the classical composite theory. Moreover, introducing crosslinking can lead to a marked reduction of losses in blend films at high electric fields while maintaining a high energy density. At 250 MV/m, a loss of 3% can be achieved in the crosslinked blend compared with 7% loss in pure blend, which is already much below that of pure P(VDF-CTFE) (35%). Furthermore, uniaxially stretch can improve the dielectric breakdown strength and mechanical properties.The promise of aromatic, amorphous, and polar polymers containing high dipolar moments with very low defect levels is demonstrated for future dielectric materials with ultrahigh electric-energy density, low loss at high applied fields, and ultrahigh breakdown strengths. Specifically, an amorphous, polar, and glass-phase dielectric polymer aromatic polythiourea (ArPTU) features extremely high dielectric breakdown strength (>1.1 GV/m), low loss at high electric fields (10% at 1.1 GV/m), and a high maximum electrical energy density (>24 J/cm3). This dissertation presents a study of the structure-property relationships and electrical properties study in ArPTU, and offers a phenomenological explanation for the experimentally observed high-field loss characteristics which facilitate the excellent energy storage properties.Besides the aromatic polythiourea, meta-aromatic polyurea (meta-PU) was developed and investigated for energy storage capacitors. Modifications to the molecular structure can tune the dipolar density and dipole moment in the polyurea systems to improve the dielectric properties. The meta-PU has an enhanced dielectric constant from the higher volume dipolar density, higher energy density, and a high electrical breakdown. A high storage electrical energy density of 13 J/cm3 with energy storage efficiency of 91% can be achieved at 670 MV/m electric field. Other polyureas, polythioureas based dielectrics with tunable dielectric properties are also summarized.Polymer dielectrics possessing high dielectric constant, low loss are not only of great importance for energy storage capacitors, but also attractive as gate dielectrics in organic thin film field effect transistors (OTFTs). In this work, solution processable PVDF based polymers, with tunable dielectric constant from 7 to more than 50 as well as ferroelectricity, were used as the gate insulator in bottom gated OTFTs with a pentacene semiconductor layer. Due to the high dielectric constant of P(VDF-TrFE-CFE), a large capacitive coupling between the gate and channel can be achieved which causes a high charge concentration at the interface of the semiconductor and dielectric layers. In devices with the P(VDF-TrFE-CFE) dielectric layer, high performances and a low minimum operation gate voltage (5-10 V) were attained. Also, the ferroelectric thin film transistor with the P(VDF-TrFE) dielectric has a high remnant polarization, which is desired for memory applications.

Electroactive Polymers (EAP): Volume 600

Electroactive Polymers (EAP): Volume 600
Author : Q. M. Zhang,Takeo Furukawa,Yoseph Bar-Cohen,J. Scheinbeim
Publisher : Materials Research Society
Release Date : 2000-07-17
Category : Science
Total pages :336
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The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.

Progress in Materials Science and Engineering: ICMSE 2013

Progress in Materials Science and Engineering: ICMSE 2013
Author : Qing Zhou Xu
Publisher : Trans Tech Publications Ltd
Release Date : 2013-10-07
Category : Technology & Engineering
Total pages :958
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Collection of selected, peer reviewed papers from the 2013 International Conference on Material Science and Engineering (ICMSE2013), October 4-6, 2013, Guilin, Guangxi, China. Chapter 1: Metal Materials; Chapter 2: Electronic and Magnetic Materials; Chapter 3: Optical Materials; Chapter 4: Structural Materials; Chapter 5: Biomaterials and Healthcare; Chapter 6: Energy and Environment Materials; Chapter 7: Nano-Scale and Amorphous Materials; Chapter 8: Functional Materials; Chapter 9: Technologies, Engineering and Processing Materials.

Polymer-based Smart Materials--processes, Properties and Application

Polymer-based Smart Materials--processes, Properties and Application
Author : Anonim
Publisher : Unknown
Release Date : 2009
Category : Polymers
Total pages :281
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Digest of Technical Papers

Digest of Technical Papers
Author : Anonim
Publisher : Unknown
Release Date : 1987
Category : Electric switchgear
Total pages :791
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Polymer Nanocomposite Materials with High Dielectric Permittivity and Low Dielectric Loss Properties

Polymer Nanocomposite Materials with High Dielectric Permittivity and Low Dielectric Loss Properties
Author : Anju Toor
Publisher : Unknown
Release Date : 2017
Category :
Total pages :83
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Polymer Nanocomposite Materials with High Dielectric Permittivity and Low Dielectric Loss Properties by Anju Toor Doctor of Philosophy in Mechanical Engineering University of California, Berkeley Professor Tarek Zohdi, Co-chair Professor Albert P. Pisano, Co-chair Materials with high dielectric permittivity have drawn increasing interests in recent years for their important applications in capacitors, actuators, and high energy density pulsed power. Particularly, polymer-based dielectrics are excellent candidates, owing to their properties such as high breakdown strength, low dielectric loss, flexibility and easy processing. To enhance the dielectric permittivity of polymer materials, typically, high dielectric constant filler materials are added to the polymer. Previously, ferroelectric and conductive fillers have been mainly used. However, such systems suffered from various limitations. For example, composites based on ferroelectric materials like barium titanate, exhibited high dielectric loss, and poor saturation voltages. Conductive fillers are used in the form of powder aggregates, and they may show 10-100 times enhancement in dielectric constant, however these nanoparticle aggregates cause the dielectric loss to be significant. Also, agglomerates limit the volume fraction of fillers in polymer and hence, the ability to achieve superior dielectric constants. Thus, the aggregation of nanoparticles is a significant challenge to their use to improve the dielectric permittivity. We propose the use of ligand-coated metal nanoparticle fillers to enhance the dielectric properties of the host polymer while minimizing dielectric loss by preventing nanoparticle agglomeration. The focus is on obtaining uniform dispersion of nanoparticles with no agglomeration by utilizing appropriate ligands/surface functionalizations on the gold nanoparticle surface. Use of ligand coated metal nanoparticles will enhance the dielectric constant while minimizing dielectric loss, even with the particles closely packed in the polymer matrix. Novel combinations of materials, which use 5 nm diameter metal nanoparticles embedded inside high breakdown strength polymer materials are evaluated. High breakdown strength polymer materials are chosen to allow further exploration of these materials for energy storage applications. In summary, two novel nanocomposite materials are designed and synthesized, one involving polyvinylidene fluoride (PVDF) as the host polymer for potential applications in energy storage and the other with SU-8 for microelectronic applications. Scanning elec- tron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy and ultramicrotoming techniques were used for the material characterization of the nanocomposite materials. A homogeneous dispersion of gold nanoparticles with low particle agglomeration has been achieved. Fabricated nanoparticle polymer composite films showed the absence of voids and cracks. Also, no evidence of macro-phase separation of nanoparticles from the polymer phase was observed. This is important because nanoparticle agglomeration and phase separation from the polymer usually results in poor processability of films and a high defect density. Dielectric characterization of the nanocomposite materials showed enhancement in the dielectric constant over the base polymer values and low dielectric loss values were observed.

Ferroelectric Materials for Energy Harvesting and Storage

Ferroelectric Materials for Energy Harvesting and Storage
Author : Deepam Maurya,Abhijit Pramanick,Dwight Viehland
Publisher : Woodhead Publishing
Release Date : 2020-10-23
Category : Technology & Engineering
Total pages :372
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The need to more efficiently harvest energy for electronics has spurred investigation into materials that can harvest energy from locally abundant sources. Ferroelectric Materials for Energy Harvesting and Storage is the first book to bring together fundamental mechanisms for harvesting various abundant energy sources using ferroelectric and piezoelectric materials. The authors discuss strategies of designing materials for efficiently harvesting energy sources like solar, wind, wave, temperature fluctuations, mechanical vibrations, biomechanical motion, and stray magnetic fields. In addition, concepts of the high density energy storage using ferroelectric materials is explored. Ferroelectric Materials for Energy Harvesting and Storage is appropriate for those working in materials science and engineering, physics, chemistry and electrical engineering disciplines. Reviews wide range of energy harvesting including solar, wind, biomechanical and more Discusses ferroelectric materials and their application to high energy density capacitors Includes review of fundamental mechanisms of energy harvesting and energy solutions, their design and current applications, and future trends and challenges

Government Reports Announcements & Index

Government Reports Announcements & Index
Author : Anonim
Publisher : Unknown
Release Date : 1989-10
Category : Science
Total pages :129
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The Five-year Outlook: The five-year outlook

The Five-year Outlook: The five-year outlook
Author : National Science Foundation (U.S.).
Publisher : Unknown
Release Date : 1980
Category : Research
Total pages :129
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36th Power Sources Conference

36th Power Sources Conference
Author : Anonim
Publisher : Unknown
Release Date : 1994
Category : Direct energy conversion
Total pages :426
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1998 High-Temperature Electronic Materials, Devices and Sensors Conference

1998 High-Temperature Electronic Materials, Devices and Sensors Conference
Author : IEEE Electron Devices Society
Publisher : Institute of Electrical & Electronics Engineers(IEEE)
Release Date : 1998
Category : Technology & Engineering
Total pages :221
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This volume addresses topics including: SiC materials and devices; novel materials and technologies; SiC and SOI technologies; packaging; and metallization.

Government Reports Annual Index

Government Reports Annual Index
Author : Anonim
Publisher : Unknown
Release Date : 1979
Category : Research
Total pages :129
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Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.