Enhanced energy density of polymer nanocomposites at a low electric field through aligned BaTiO3 nanowires

2017 ◽  
Vol 5 (13) ◽  
pp. 6070-6078 ◽  
Author(s):  
Bing Xie ◽  
Haibo Zhang ◽  
Qi Zhang ◽  
Jiadong Zang ◽  
Chao Yang ◽  
...  
Keyword(s):  
Energy Density ◽  
Electric Field ◽  
Polymer Nanocomposites ◽  
Polymer Matrix ◽  
Casting Method

Significantly enhanced energy density is obtained at a low electric field by embedding aligned BaTiO3 nanowires in a polymer matrix via a new physical-assisted casting method.

High energy density of polymer nanocomposites at a low electric field induced by modulation of their topological-structure

2016 ◽  
Vol 4 (21) ◽  
pp. 8359-8365 ◽  
Author(s):  
Yang Shen ◽  
Dashan Shen ◽  
Xin Zhang ◽  
Jianyong Jiang ◽  
Zhenkang Dan ◽  
...  
Keyword(s):  
Energy Density ◽  
Electric Field ◽  
Polymer Nanocomposites ◽  
Topological Structure ◽  
High Energy ◽  
High Energy Density

High energy density at low electric field is achieved for polymer nanocomposites by modulating topological structure.

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.

Microstructure-Based Simulation of the Dielectric Properties of Polymer-Ceramic Composites for Capacitor Applications

2006 ◽  
Vol 949 ◽  
Author(s):  
Jeffrey P. Calame
Keyword(s):  
Electric Field ◽  
Polymer Matrix ◽  
Matrix Material ◽  
Realistic Model ◽  
Ceramic Composites ◽  
Internal Electric Field ◽  
Large Particles ◽  
Different Types ◽  
Model Spaces ◽  
Electrostatic Modeling

ABSTRACTResearch on the microstructure-based modeling of composite dielectrics for capacitor applications is described. Methods for predicting the composite dielectric permittivity and internal electric field distributions within the microstructure using finite difference quasi-electrostatic modeling are described, along with methods of generating realistic model spaces of particulate microstructures. An existing algorithm for generating random, monosized spheres-in-a-dielectric matrix model spaces is modified to allow the treatment of bimodal composites in which small particles are deliberately segregated into the spaces between large particles. Such composites can have substantially higher total volumetric filling fractions of particles, leading to higher composite permittivity. The variations in permittivity with the filling fractions of bimodal inclusions are studied with the new model, with cases covering three different types of polymer matrix material. The effect of the small particle additions on the electric field statistics within the polymer matrix is also explored.

scholarly journals Interface and Interphase in Polymer Nanocomposites with Bare and Core-Shell Gold Nanoparticles

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 541 ◽  
Author(s):  
Albert J. Power ◽  
Ioannis N. Remediakis ◽  
Vagelis Harmandaris
Keyword(s):  
Polymer Nanocomposites ◽  
Polymer Matrix ◽  
Md Simulations ◽  
Polymer Chains ◽  
Core Shell ◽  
Wulff Construction ◽  
Density Profiles ◽  
Au Nps ◽  
Polymeric Chains ◽  
Terminal Dynamics

Metal nanoparticles are used to modify/enhance the properties of a polymer matrix for a broad range of applications in bio-nanotechnology. Here, we study the properties of polymer/gold nanoparticle (NP) nanocomposites through atomistic molecular dynamics, MD, simulations. We probe the structural, conformational and dynamical properties of polymer chains at the vicinity of a gold (Au) NP and a functionalized (core/shell) Au NP, and compare them against the behavior of bulk polyethylene (PE). The bare Au NPs were constructed via a systematic methodology starting from ab-initio calculations and an atomistic Wulff construction algorithm resulting in the crystal shape with the minimum surface energy. For the functionalized NPs the interactions between gold atoms and chemically adsorbed functional groups change their shape. As a model polymer matrix we consider polyethylene of different molecular lengths, from the oligomer to unentangled Rouse like systems. The PE/Au interaction is parametrized via DFT calculations. By computing the different properties the concept of the interface, and the interphase as well, in polymer nanocomposites with metal NPs are critically examined. Results concerning polymer density profiles, bond order parameter, segmental and terminal dynamics show clearly that the size of the interface/interphase, depends on the actual property under study. In addition, the anchored polymeric chains change the behavior/properties, and especially the chain density profile and the dynamics, of the polymer chain at the vicinity of the Au NP.

High-Energy-Density Polymer Nanocomposites Composed of Newly Structured One-Dimensional BaTiO3@Al2O3 Nanofibers

2017 ◽  
Vol 9 (4) ◽  
pp. 4024-4033 ◽  
Author(s):  
Zhongbin Pan ◽  
Lingmin Yao ◽  
Jiwei Zhai ◽  
Dezhou Fu ◽  
Bo Shen ◽  
...  
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Energy ◽  
High Energy Density ◽  
One Dimensional

scholarly journals Size and temperature effects on dielectric breakdown of ferroelectric films

2020 ◽  
Author(s):  
Sheng Tong
Keyword(s):  
Energy Density ◽  
Electric Field ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Operating Temperature ◽  
Electric Energy ◽  
Ferroelectric Films ◽  
Lead Lanthanum Zirconate Titanate ◽  
Dimensional Parameters ◽  
Electric Energy Density

Abstract The paper introduces a model of dielectric breakdown strength. The model integrated thermal breakdown and defect models, representing the relationship between the electric field of ferroelectric films and dimensional parameters and operating temperature. This model is verified with experimental results of the lead lanthanum zirconate titanate (PLZT) films of various film thickness (d = 0.8 – 3 mm), electrode area (A = 0.0020 – 25 mm2) tested under a range of operating temperature (T = 300 – 400 K) with satisfying fitting results. Also learned is a relationship that the recoverable electric energy density is directly proportional to the square of breakdown electric field. This relationship is found viable in predicting the electric energy density in terms of variables of d, A, and T for the PLZT films.

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