A5004436005- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Ferroelectric and Piezoelectric Materials
- Electromagnetic wave absorption materials
- High voltage insulation and dielectric phenomena
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Synthesis and properties of polymers
- Polyoxometalates: Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Vanadium and Halogenation Chemistry
- Advanced Battery Materials and Technologies
- Multiferroics and related materials
- Polymer Nanocomposites and Properties
- Metamaterials and Metasurfaces Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Conducting polymers and applications
- Advanced Antenna and Metasurface Technologies
- Dielectric properties of ceramics
- Blood disorders and treatments
- Gas Sensing Nanomaterials and Sensors
- Microbial infections and disease research
- Schizophrenia research and treatment
- Herpesvirus Infections and Treatments
- Genetic factors in colorectal cancer
Southern University of Science and Technology
2018-2024
Xi'an Jiaotong University
2012-2020
Qingdao University
2020
Affiliated Hospital of Qingdao University
2020
Novel (United States)
2019
China XD Group (China)
2015-2017
Ministry of Education of the People's Republic of China
2009-2015
Shandong Agricultural University
2014
Northwest University
2009-2012
Sandwich-structured BaTiO3 /poly(vinylidene fluoride) (PVDF) nanocomposites are successfully prepared by the solution-casting method layer layer. They possess both high breakdown strength and large dielectric polarization simultaneously. An ultra-high energy-storage density of 18.8 J cm(-3) can be achieved adjusting volume fraction ceramic fillers: this is almost three times larger than that pure PVDF.
A sandwich-structured ceramic/polymer dielectric nanocomposite with significantly enhanced breakdown strength and restrained conductive loss was obtained by tailoring filler contents.
In this work, homogeneous ceramics-polymer nanocomposites consisting of surface treated BaTiO3 (BT) particles as fillers and poly(vinylidene fluoride) polymer matrix have been prepared using a solution casting process. The exhibit enhanced dielectric permittivity reduced loss tangent. frequency temperature dependencies the tangent suggest that introduced BT phase interface areas contribute to improvement responses. Meanwhile, X-ray diffraction patterns Differential Scanning Calorimetry (DSC)...
The design of gradient layer-structured BaTiO<sub>3</sub>/PVDF nanocomposites gives rise to highly enhanced breakdown strength and discharged energy density.
Recent progress in multilayered hierarchical polymer composites for advanced dielectric energy storage are reviewed.
Abstract High‐temperature dielectric materials for capacitive energy storage are in urgent demand modern power electronic and electrical systems. However, the drastically degraded capabilities owing to inevitable conduction loss severely limit utility of polymers at elevated temperatures. Herein, a new approach based on situ preparation oxides onto polyimide (PI) films high‐temperature laminated polymer dielectrics is described. As confirmed by computational simulations, charge injection...
High-temperature polymer dielectrics have broad application prospects in next-generation microelectronics and electrical power systems. However, the capacitive energy densities of dielectric polymers at elevated temperatures are severely limited by carrier excitation transport. Herein, a molecular engineering strategy is presented to regulate bulk-limited conduction bonding amino polyhedral oligomeric silsesquioxane (NH2 -POSS) with chain ends polyimide (PI). Experimental studies density...
Polymer film capacitors have been widely used in electronics and electrical power systems due to their advantages of high densities, fast charge-discharge speed, great stability. However, the exponential increase conduction with temperature applied electric field substantially degrades capacitive performance dielectric polymers at elevated temperatures. Here, first example controlling energy level charge traps all-organic crosslinked by tailoring molecular structures that significantly...
We report nanocomposites of increased dielectric permittivity, enhanced electric breakdown strength and high‐energy density based on surface‐modified BaTiO 3 ( BT ) nanoparticles filled poly(vinylidene fluoride) polymer. Polyvinylprrolidone PVP is used as the surface modification agent homogeneous nanocomposite films have been prepared by solution casting processing. The permittivity with treated higher than those untreated reaches maximum value 77 (1 kHz) at concentration 55 vol%. greatly...
Homogeneous ceramics-polymer nanocomposites comprising core-shell structured BaTiO3/SiO2 nanoparticles and a poly(vinylidene fluoride) polymer matrix have been prepared. The nanocomposite of 2 vol. % exhibits 46% reduced energy loss compared to that BaTiO3 nanoparticles, an density 6.28 J/cm3, under applied electric field 340 MV/m. Coating SiO2 layers on the surface significantly reduces high via reducing Maxwell–Wagner–Sillars interfacial polarization space charge polarization.
Surface modification on ceramic fillers is of interest to help improve their compatibility in ceramic/polymer nanocomposites and, if possible, control the influence modifiers performance nanocomposites. In this paper, four kinds small-molecule were chosen treat surface BT nanoparticles, and PVDF-based filled with modified nanoparticles prepared. The influences compatibility, permittivity, breakdown strength polarization have been systematically investigated order identify optimal modifier...
A sandwich-structured film is capable of an ultra-high efficiency 89% with energy density 11.8 J cm<sup>−3</sup> at a low field 300 MV m<sup>−1</sup>.
Abstract Polymer capacitors are essential components of advanced electronic and power systems. However, the deficient high‐temperature capacitive performance polymer dielectrics fails to meet demand for harsh condition applications, due mutually restrictive relationships in permittivity ( ε r ), glass transition temperature (T g bandgap E ). Here, a modularized molecular engineering strategy is reported enhance dielectrics. First, potential influences multiple structural units on , T...
A kind of polymer based composites was prepared by embedding the fillers core-shell Ag@SiO2 nanoparticles into polyimide (PI) matrix. The obtained Ag@SiO2/PI (50% vf fillers) show remarkably improved high thermal conductivity and low relative permittivity. maximum value is 7.88 W/(mK) permittivity dielectric loss are about 11.7 0.015 at 1 MHz, respectively. Compared with self-passivated nanometer Al* particles composites, nano-composite beneficial to increase reduce composites. mechanism...
Ceramic-polymer composites have attracted extensive attention in electrical applications due to their high permittivity and low loss. In this work, we report the studies on preparation properties of barium titanate (BT)/ poly(vinylidenefluoride) (PVDF) composite thin films. The film was prepared by a modified process rather than conventional method. adopted ballmilling technique instead stirring method disperse BT nanoparticles into PVDF solution. Scanning electron microscopy images obtained...
We report improved electric breakdown strength, high energy density, and low dielectric loss of nanocomposites using surface modified BaTiO3 (BT) nanoparticles filling in poly(vinylidene fluoride) polymer matrix. Dielectric properties the have been investigated as a function BT content. The strength 285 MV/m has achieved at nanocomposite with 10 vol. % nanoparticles. results indicate that functionalized produced passivation layers on ceramic fillers can improve homogeneity nanocomposites,...
A multilayered film is capable of an ultra-high energy density 20.9 J cm<sup>−3</sup> with efficiency 72%, outperforming the current ferroelectric polymers.
Nanocomposites exhibit promising performance in the application of dielectric capacitors due to their excellent properties. However, nanoparticles are easy aggregate and difficult be compatible with polymer matrices, thus requiring surface modification organic ligands. Surface has been proposed as a useful method for regulating properties over long history. In this Review, we have outlined some modifiers characteristics, including reactive mode each modifier effect, well its characteristic...
The PC-Au nanodots-PC heterojunction film with merely 0.0035 vol% of Au nanodots exhibited a superior U e (6.25 J cm −3 ) and η (86.6%) at 150 °C, far surpassing those the reported advanced polymers nanocomposite dielectrics.