A rational design for reconciling high permittivity and breakdown strength in layered PVDF composites from TaB2@Ta2O5 nanofiller induced Schottky barrier effect

2019 ◽  
Vol 7 (32) ◽  
pp. 9975-9983 ◽  
Author(s):  
Qihuang Deng ◽  
Qin Wu ◽  
Yefeng Feng ◽  
Cheng Peng ◽  
Ben Qin ◽  
...  
Keyword(s):  
Energy Density ◽  
Polymer Composites ◽  
Schottky Barrier ◽  
Rational Design ◽  
Breakdown Strength ◽  
High Energy ◽  
High Energy Density ◽  
Barrier Effect ◽  
High Permittivity

A contradiction between high permittivity and breakdown strength has long been problematic for obtaining high energy density in conductor/polymer composites.

Rational Design of High-Energy-Density Polymer Composites by Machine Learning Approach

2021 ◽  
Vol 4 (2) ◽  
pp. 1449-1458
Author(s):  
Ming-Xiao Zhu ◽  
Qiu-Cheng Yu ◽  
Heng-Gao Song ◽  
Ting-Xin Chen ◽  
Ji-Ming Chen
Keyword(s):  
Machine Learning ◽  
Energy Density ◽  
Polymer Composites ◽  
Rational Design ◽  
High Energy ◽  
High Energy Density ◽  
Learning Approach ◽  
Machine Learning Approach

scholarly journals High energy density of BaTiO3@TiO2 nanosheet/polymer composites via ping-pong-like electron area scattering and interface engineering

2022 ◽  
Vol 14 (1) ◽  
Author(s):  
Gang Jian ◽  
Yong Jiao ◽  
Liang Feng ◽  
Qingzhen Meng ◽  
Ning Yang ◽  
...  
Keyword(s):  
Energy Density ◽  
Polymer Composites ◽  
Vinylidene Fluoride ◽  
Breakdown Strength ◽  
High Energy ◽  
High Energy Density ◽  
Core Shell ◽  
Interface Engineering ◽  
Hybrid Strategy ◽  
Ping Pong

AbstractDielectric substances exhibit great potential for high-power capacitors due to their high stability and fast charge–discharge; however, a long-term challenge is to enhance energy density. Here, we propose a poly(vinylidene fluoride) (PVDF) composite utilizing BaTiO3 nanoparticle@TiO2 nanosheet (BT@TO ns) 2D nanohybrids as fillers, aiming at combining the interfacial strategy of using a core–shell filler and the electron scattering of a 2D filler to improve the energy density. With 4 wt% filler, the composite possesses the largest breakdown strength (Eb) of 561.2 MV m−1, which is significantly enhanced from the 407.6 MV m−1 of PVDF, and permittivity of 12.6 at 1 kHz, which is a 23% increase from that of PVDF. A superhigh energy density of 21.3 J cm−3 with an efficiency of 61% is obtained at 550 MV m−1. The 2D BT@TO ns-filled composite exhibits a higher energy density than composites filled with core–shell 1D BT@TO nws or non-core–shell 0D BT, 1D TO, or 2D TO particles. The Eb and energy density improvements are attributed to the buffer layer-based interface engineering and enhanced area scattering of electrons caused by the 2D hybrids, an effect similar to that of a ping-pong paddle to scatter electric field-induced charge migrations in composites. Thus, an effective hybrid strategy is presented for achieving high-performance polymer composites that can be used in energy storage devices.

scholarly journals Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2942
Author(s):  
Bhausaheb V. Tawade ◽  
Ikeoluwa E. Apata ◽  
Nihar Pradhan ◽  
Alamgir Karim ◽  
Dharmaraj Raghavan
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Breakdown Strength ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
Polymer Chains ◽  
High Energy Density ◽  
Grafted Nanoparticles ◽  
Grafting From

The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

Enhanced dielectric properties and thermostability in polyimide composites with core-shell structured polyimide@BaTiO3 nanoparticles

2021 ◽  
pp. 095400832199352
Author(s):  
Wei Deng ◽  
Guanguan Ren ◽  
Wenqi Wang ◽  
Weiwei Cui ◽  
Wenjun Luo
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Energy Density ◽  
Breakdown Strength ◽  
In Situ Polymerization ◽  
Dielectric Materials ◽  
High Energy ◽  
Amic Acid ◽  
High Energy Density ◽  
Core Shell

Polymer composites with high dielectric constant and thermal stability have shown great potential applications in the fields relating to the energy storage. Herein, core-shell structured polyimide@BaTiO3 (PI@BT) nanoparticles were fabricated via in-situ polymerization of poly(amic acid) (PAA) and the following thermal imidization, then utilized as fillers to prepare PI composites. Increased dielectric constant with suppressed dielectric loss, and enhanced energy density as well as heat resistance were simultaneously realized due to the presence of PI shell between BT nanoparticles and PI matrix. The dielectric constant of PI@BT/PI composites with 55 wt% fillers increased to 15.0 at 100 Hz, while the dielectric loss kept at low value of 0.0034, companied by a high energy density of 1.32 J·cm−3, which was 2.09 times higher than the pristine PI. Moreover, the temperature at 10 wt% weight loss reached 619°C, demonstrating the excellent thermostability of PI@BT/PI composites. In addition, PI@BT/PI composites exhibited improved breakdown strength and toughness as compared with the BT/PI composites due to the well dispersion of PI@BT nanofillers and the improved interfacial interactions between nanofillers and polymer matrix. These results provide useful information for the structural design of high-temperature dielectric materials.

scholarly journals Significantly Enhanced Energy Storage Density by Modulating the Aspect Ratio of BaTiO3 Nanofibers

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Dou Zhang ◽  
Xuefan Zhou ◽  
James Roscow ◽  
Kechao Zhou ◽  
Lu Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Aspect Ratio ◽  
Volume Fraction ◽  
Breakdown Strength ◽  
Electric Displacement ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Density ◽  
Storage Density

Abstract There is a growing need for high energy density capacitors in modern electric power supplies. The creation of nanocomposite systems based on one-dimensional nanofibers has shown great potential in achieving a high energy density since they can optimize the energy density by exploiting both the high permittivity of ceramic fillers and the high breakdown strength of the polymer matrix. In this paper, BaTiO3 nanofibers (NFs) with different aspect ratio were synthesized by a two-step hydrothermal method and the permittivity and energy storage of the P(VDF-HFP) nanocomposites were investigated. It is found that as the BaTiO3 NF aspect ratio and volume fraction increased the permittivity and maximum electric displacement of the nanocomposites increased, while the breakdown strength decreased. The nanocomposites with the highest aspect ratio BaTiO3 NFs exhibited the highest energy storage density at the same electric field. However, the nanocomposites with the lowest aspect ratio BaTiO3 NFs achieved the maximal energy storage density of 15.48 J/cm3 due to its higher breakdown strength. This contribution provides a potential route to prepare and tailor the properties of high energy density capacitor nanocomposites.

Rational design of Na(Li1/3Mn1/2Cr1/6)O2 exhibiting cation–anion-coupled redox reactions with superior electrochemical, thermodynamic, atomic, and chemomechanical properties for advanced sodium-ion batteries

2018 ◽  
Vol 6 (37) ◽  
pp. 18036-18043 ◽  
Author(s):  
Duho Kim ◽  
Maenghyo Cho ◽  
Kyeongjae Cho
Keyword(s):  
Energy Density ◽  
Redox Reactions ◽  
Rational Design ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density ◽  
Sodium Ion Batteries

Based on a cation–anion-coupled redox paradigm, Na(Li1/3Mn1/2Cr1/6)O2 is systematically designed to use rational anion redox reactions (O2−/O−) for high energy density cathodes in sodium-ion batteries.

High-field antiferroelectric-like behavior in uniaxially stretched poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene)-grafted-poly(methyl methacrylate) films with high energy density

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1589-1599 ◽  
Author(s):  
Honghong Gong ◽  
Bei Miao ◽  
Xiao Zhang ◽  
Junyong Lu ◽  
Zhicheng Zhang
Keyword(s):  
Energy Density ◽  
Methyl Methacrylate ◽  
High Field ◽  
Vinylidene Fluoride ◽  
Breakdown Strength ◽  
High Energy ◽  
High Energy Density ◽  
Poly Methyl Methacrylate ◽  
Poly Vinylidene Fluoride ◽  
Discharged Energy Density

The antiferroelectric-like behavior could be retained up to 675 MV m−1 with a discharged energy density of 23.3 J cm−3 because of the confinement of rigid PMMA segment onto the ferroelectric relaxation of P(VDF-TrFE-CTFE) and the high breakdown strength.

Multilayered ferroelectric polymer composites with high energy density at elevated temperature

2021 ◽  
Vol 202 ◽  
pp. 108594
Author(s):  
Yushu Li ◽  
Sang Cheng ◽  
Shaojie Wang ◽  
Chao Yuan ◽  
Zhen Luo ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Energy Density ◽  
Polymer Composites ◽  
High Energy ◽  
High Energy Density ◽  
Ferroelectric Polymer
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