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      All Polymer Dielectric Films for Achieving High Energy Density Film Capacitors by Blending Poly(Vinylidene Fluoride-Trifluoroethylene-Chlorofluoroethylene) with Aromatic Polythiourea

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          Abstract

          Construct dielectric films with high energy density and efficiency are the key factor to fabricate high-performance dielectric film capacitors. In this paper, an all organic composite film was constructed based on high dielectric polymer and linear dielectric polymer. After the optimized polycondensation reaction of a linear dielectric polymer aromatic polythiourea (ArPTU), the proper molecular weight ArPTU was obtained, which was introduced into poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (PVDF-TrFE-CFE) terpolymer for a composite dielectrics. The results indicate that the addition of ArPTU molecules reduces the dielectric loss and improves the breakdown field strength of the PVDF-TrFE-CFE effectively. For the PVDF-TrFE-CFE/ArPTU (90/10) composite film, the maximum energy density about 22.06 J/cm 3 at 407.57 MV/m was achieved, and high discharge efficiency about 72% was presented. This composite material can be casted on flexible substrate easily, and PVDF-TrFE-CFE/ArPTU organic composite films having high energy density, high breakdown field strength, low dielectric loss, and higher discharge efficiency are obtained. This is an unreported exploration about high energy density organic dielectric films based on PVDF-TrFE-CFE matrix and linear polymer dielectrics, and the findings of this research can provide a simple and scalable method for producing flexible high energy density materials for energy storage devices.

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          Most cited references36

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          Emerging 3D-Printed Electrochemical Energy Storage Devices: A Critical Review

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            Exploring Strategies for High Dielectric Constant and Low Loss Polymer Dielectrics.

            Lei Zhu (2014)
            Polymer dielectrics having high dielectric constant, high temperature capability, and low loss are attractive for a broad range of applications such as film capacitors, gate dielectrics, artificial muscles, and electrocaloric cooling. Unfortunately, it is generally observed that higher polarization or dielectric constant tends to cause significantly enhanced dielectric loss. It is therefore highly desired that the fundamental physics of all types of polarization and loss mechanisms be thoroughly understood for dielectric polymers. In this Perspective, we intend to explore advantages and disadvantages for different types of polarization. Among a number of approaches, dipolar polarization is promising for high dielectric constant and low loss polymer dielectrics, if the dipolar relaxation peak can be pushed to above the gigahertz range. In particular, dipolar glass, paraelectric, and relaxor ferroelectric polymers are discussed for the dipolar polarization approach.
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              High energy and power density capacitors from solution-processed ternary ferroelectric polymer nanocomposites.

              Concurrent improvements in dielectric constant and breakdown strength are attained in a solution-processed ternary ferroelectric polymer nanocomposite incorporated with two-dimensional boron nitride nanosheets and zero-dimensional barium titanate nanoparticles that synergistically interact to enable a remarkable energy-storage capability, including large discharged energy density, high charge-discharge efficiency, and great power density.
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                Author and article information

                Contributors
                384342978@qq.com
                550786016@qq.com
                yang0220@163.com
                1195642779@qq.com
                1196158968@qq.com
                1297429609@qq.com
                jj_eagle@163.com
                Journal
                Nanoscale Res Lett
                Nanoscale Res Lett
                Nanoscale Research Letters
                Springer US (New York )
                1931-7573
                1556-276X
                6 February 2020
                6 February 2020
                2020
                : 15
                : 36
                Affiliations
                [1 ]ISNI 0000 0004 0369 4060, GRID grid.54549.39, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, , University of Electronic Science and Technology of China, ; Chengdu, 610054 People’s Republic of China
                [2 ]ISNI 0000 0004 1762 504X, GRID grid.449955.0, Chongqing Engineering Research Center of New Energy Storage Devices and Applications, , Chongqing University of Arts and Sciences, ; Chongqing, 402160 People’s Republic of China
                Author information
                http://orcid.org/0000-0003-3127-3995
                Article
                3270
                10.1186/s11671-020-3270-x
                7005242
                32030580
                46e2e16f-e76b-4a3d-a915-bcc15c0476c7
                © The Author(s). 2020

                Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

                History
                : 26 September 2019
                : 27 January 2020
                Funding
                Funded by: FundRef http://dx.doi.org/10.13039/100014717, National Outstanding Youth Science Fund Project of National Natural Science Foundation of China;
                Award ID: No. 51477026 & 61471085
                Award Recipient :
                Categories
                Nano Express
                Custom metadata
                © The Author(s) 2020

                Nanomaterials
                aromatic polythiourea,composite films,energy storage density,molecular weight,poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene)

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