Nanoparticles with rationally designed isoelectronic traps as fillers significantly enhance breakdown strength and electrostatic energy density of polymer composites

2020 ◽  
Vol 195 ◽  
pp. 108201 ◽  
Author(s):  
Junyi Yu ◽  
Shanjun Ding ◽  
Shuhui Yu ◽  
Yu-Chen Lu ◽  
Pengpeng Xu ◽  
...  
Keyword(s):  
Energy Density ◽  
Polymer Composites ◽  
Breakdown Strength ◽  
Electrostatic Energy

Non-intuitive concomitant enhancement of dielectric permittivity, breakdown strength and energy density in percolative polymer nanocomposites by trace Ag nanodots

2019 ◽  
Vol 7 (25) ◽  
pp. 15198-15206 ◽  
Author(s):  
Xin Huang ◽  
Xin Zhang ◽  
Guang-Kun Ren ◽  
Jianyong Jiang ◽  
Zhenkang Dan ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Dielectric Permittivity ◽  
Polymer Nanocomposites ◽  
Breakdown Strength ◽  
Electrostatic Energy

In situ synthesized Ag nanodots enhances electrostatic energy storage by tuning dipoles.

scholarly journals Designing polymer nanocomposites with high energy density using machine learning

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Zhong-Hui Shen ◽  
Zhi-Wei Bao ◽  
Xiao-Xing Cheng ◽  
Bao-Wen Li ◽  
Han-Xing Liu ◽  
...  
Keyword(s):  
Machine Learning ◽  
Energy Storage ◽  
Energy Density ◽  
Polymer Nanocomposites ◽  
Breakdown Strength ◽  
Phase Field Model ◽  
High Energy ◽  
High Energy Density ◽  
Electrostatic Energy ◽  
Wide Range

AbstractAddressing microstructure-property relations of polymer nanocomposites is vital for designing advanced dielectrics for electrostatic energy storage. Here, we develop an integrated phase-field model to simulate the dielectric response, charge transport, and breakdown process of polymer nanocomposites. Subsequently, based on 6615 high-throughput calculation results, a machine learning strategy is schemed to evaluate the capability of energy storage. We find that parallel perovskite nanosheets prefer to block and then drive charges to migrate along with the interfaces in x-y plane, which could significantly improve the breakdown strength of polymer nanocomposites. To verify our predictions, we fabricate a polymer nanocomposite P(VDF-HFP)/Ca2Nb3O10, whose highest discharged energy density almost doubles to 35.9 J cm−3 compared with the pristine polymer, mainly benefit from the improved breakdown strength of 853 MV m−1. This work opens a horizon to exploit the great potential of 2D perovskite nanosheets for a wide range of applications of flexible dielectrics with the requirement of high voltage endurance.

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.

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.

Excellent comprehensive energy storage capabilities achieved in linear polymer composites via inserting acrylic rubber dielectric elastomers

2021 ◽  
Author(s):  
Jie Chen ◽  
Yifei Wang ◽  
Weixing Chen
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Polymer Composites ◽  
Linear Polymer ◽  
Dielectric Elastomers ◽  
Organic Film ◽  
Available Energy ◽  
Multilayer Composites ◽  
Potential Applications

Multilayer composites have the potential applications in organic film capacitors due to their excellent dielectric and breakdown characteristic. However, poor efficiency (η) and limited available energy density (Ue) of the...

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