Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for improving breakdown strength and energy storage density of dielectric composite material

A technology of composite materials and breakdown strength, which is applied in the field of improving the breakdown strength and energy storage density of dielectric composite materials, can solve the problems of deterioration of electrical breakdown performance of composite films, improve interfacial compatibility, and improve dispersion controllability And the effect of stability and high energy storage density

Active Publication Date: 2017-09-15
UNIV OF SCI & TECH BEIJING
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface modifier coats the inorganic nanofiller to form an organic shell, which improves the interfacial compatibility between the inorganic nanofiller and the polymer matrix, reduces the interface defects between the filler and the polymer matrix, and effectively improves the compounding process. The problem that the electrical breakdown performance of the film deteriorates with the increase of the filler increases the energy storage density accordingly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving breakdown strength and energy storage density of dielectric composite material
  • Method for improving breakdown strength and energy storage density of dielectric composite material
  • Method for improving breakdown strength and energy storage density of dielectric composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] BaTiO 3 Hydroxylation: Weigh 3g of dried BaTiO 3 Put it into a three-necked round-bottomed flask, add 70ml of hydrogen peroxide, and ultrasonically disperse for half an hour. The reaction system is magnetically stirred in an oil bath at 106°C, and heated to reflux for 6h. After the reaction, cool to room temperature and centrifuge with a low-speed centrifuge (3000r, 10min). Then, it was centrifuged and washed twice with deionized water, and the obtained product was dried at 80° C. for 12 hours. Grinding to get BaTiO 3 -OH;

[0069] TC-2 surface coating modification: weigh 1g of BaTiO 3 -OH powder was placed in a three-necked round bottom flask, dissolved in 80ml of isopropanol, and stirred for 30min while ultrasonically to promote its dissolution. Then, 0.1ml of TC-2 was added dropwise with magnetic stirring and refluxed in an oil bath at 70°C for 2h. After the reaction was completed, it was cooled to The product was obtained by centrifugation at room temperature at...

Embodiment 2

[0072] BaTiO 3 Hydroxylation: Weigh 3g of dried BaTiO 3 Put it into a three-necked round-bottomed flask, add 70ml of hydrogen peroxide, and ultrasonically disperse for half an hour. The reaction system is magnetically stirred in an oil bath at 106°C, and heated to reflux for 6h. After the reaction, cool to room temperature and centrifuge with a low-speed centrifuge (3000r, 10min). Then, it was centrifuged and washed twice with deionized water, and the obtained product was dried at 80° C. for 12 hours. Grinding to get BaTiO 3 -OH;

[0073] TC-2 surface coating modification: weigh 1g of BaTiO 3 -OH powder was placed in a three-necked round bottom flask, dissolved in 80ml of isopropanol, and stirred for 30min while ultrasonically to promote its dissolution. Then, 0.1ml of TC-2 was added dropwise with magnetic stirring and refluxed in an oil bath at 70°C for 2h. After the reaction was completed, it was cooled to The product was obtained by centrifugation at room temperature at...

Embodiment 3

[0080] Weigh 0.01204g of unmodified BT nanoparticles, add it to 4ml DMF and ultrasonically disperse until the nanofiller forms a stable suspension in the solvent; add 0.5g PVDF to the above suspension while stirring, then place it at 30°C overnight Stir to dissolve completely. After stirring evenly, cast the film on a dry and clean glass plate. The composite film cast by solution is placed in an oven, and dried under the condition of 60-80° C., so that the solvent is completely volatilized. A composite thin film BT / PVDF with a filler content of 2vol% was obtained.

[0081] The BT-PVDF composite films with filling amounts of 2%, 4%, 6%, 8%, and 10% were prepared by changing the amount of BT particles added.

[0082] Scanning electron microscope observation of the composite film, such as Figure 4 As shown in (a), it was found that BT particles were seriously agglomerated in the PVDF matrix. The electrical breakdown performance and energy storage density of the composite film...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Energy storage densityaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for improving the breakdown strength and the energy storage density of a dielectric composite material, and belongs to the technical field of dielectric energy storage materials. A composite dielectric film is produced through filler pretreatment and coating of a nano-filler with a surface modifier, the dielectric composite material is composed of a modified inorganic nano-filler and a polymer matrix, and the inorganic nano-filler is coated with the surface modifier to form an organic shell layer, so the interface compatibility of the inorganic nano-filler and the polymer matrix is improved, the interface defects between the filler and the polymer matrix are reduced, the problem of deterioration of the electric breakdown performance of the composite film with the increase of the filler is effectively solved, and the energy storage density is correspondingly improved.

Description

technical field [0001] The invention relates to the technical field of dielectric energy storage materials, in particular to a method for improving the breakdown strength and energy storage density of dielectric composite materials. Background technique [0002] With the development of the electronics industry, people pay more and more attention to dielectric materials with high energy storage density. One of the two parameters that restricts the material energy storage density is the dielectric constant (ε), and the other is the electrical breakdown strength (E b ). Inorganic dielectric materials usually have a high dielectric constant, but their processing performance is poor and their application range is limited; although polymer materials have good processing performance, their dielectric constant is low. Therefore, it is possible to combine the polymer matrix with the inorganic dielectric filler to prepare a composite material with a higher energy storage density to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08K9/10C08K9/02C08K9/04C08K3/24C08L27/16C08J5/18
CPCC08J5/18C08J2327/16C08K3/24C08K9/02C08K9/04C08K9/10C08K2201/011C08L2203/16C08L2203/20C08L27/16
Inventor 胡澎浩张洋洋高胜敏王鹏
Owner UNIV OF SCI & TECH BEIJING
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com