GR (graphene)-TiO2-PVDF (polyvinylidene fluoride) nano-composite material used for preparing high energy storage density capacitor and preparation method of GR-TiO2-PVDF nano-composite material

A technology of nanocomposite materials and high energy storage density, which is applied in the manufacture of capacitors, capacitors, laminated capacitors, etc., can solve the problem of failure to effectively increase the energy storage density of film capacitors, the reduction of breakdown field strength of nanocomposite materials, and the problem of nanocomposite thin films. Large thickness and other issues, to achieve the effect of strong flexibility, improved electrical energy storage capacity, and enhanced ability to uniform electric field

Inactive Publication Date: 2019-05-21
FOSHAN UNIVERSITY
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 -Although the dielectric constant of PVDF film capacitors has been greatly improved compared with PVDF film capacitors, it also brings a significant reduction in the breakdown field strength of nanocomposites to 200.0MV / m, and the stability is also lower. Therefore, TiO 2 -The energy storage density of PVDF film capacitors has not been effectively improved
In addition, the thickness of the prepared nanocomposite film is very large, the response time is long and it is not conducive to the miniaturization of the device, which limits its application in some high integrated circuits.

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
  • GR (graphene)-TiO2-PVDF (polyvinylidene fluoride) nano-composite material used for preparing high energy storage density capacitor and preparation method of GR-TiO2-PVDF nano-composite material
  • GR (graphene)-TiO2-PVDF (polyvinylidene fluoride) nano-composite material used for preparing high energy storage density capacitor and preparation method of GR-TiO2-PVDF nano-composite material
  • GR (graphene)-TiO2-PVDF (polyvinylidene fluoride) nano-composite material used for preparing high energy storage density capacitor and preparation method of GR-TiO2-PVDF nano-composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of GR-TiO used to prepare capacitors with high energy storage density 2 -The preparation method of PVDF nanocomposite material, comprises first carrying out nano TiO 2 preparation, and then the prepared nano-TiO 2 For GR-TiO 2 - Preparation of PVDF nanocomposites;

[0036] refer to figure 1 , where the nano-TiO 2 The preparation method is as follows: Take 4.80g of citric acid, dissolve it with deionized water, stir, and slowly drop 8.56ml of tetrabutyl titanate into it; stir for 10min, then perform ultrasonication for 30min, and then seal and stir at 70°C for 3h; open the sealing cover , placed at 150°C for gelation, then dried at 200°C for 60 minutes to form a gel with a porous spatial structure; take out the gel, place it in a muffle furnace, and calcinate it at 600°C for 6 hours, take it out, and perform the first Grinding, the grinding time is 30min; add 20ml of alcohol, put it in a ball mill, and conduct the second grinding, ball milling at 4000rad / s fo...

Embodiment 2

[0047] The only difference between this embodiment and embodiment 1 is that the rotation speed of the spin coating film in this embodiment is different, and the obtained GR-TiO 2 - PVDF nanocomposite films have different thicknesses. The details are shown in Table 3 below:

[0048] Table 3 GR-TiO prepared at different rotational speeds 2 - Thickness of PVDF nanocomposite film

[0049] Speed(rad / s)

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of a GR (graphene)-TiO2-PVDF (polyvinylidene fluoride) nano-composite material used for preparing a high energy storage density capacitor. The dielectric constant of the GR-TiO2-PVDF nano-composite material prepared by dispersing nano-graphene and nano-TiO2 and mixing the dispersed nano-graphene and nano-TiO2 into an organic polymer matrix PVDF is greatly improved. Meanwhile, the invention also discloses the GR-TiO2-PVDF nano-composite material prepared with the preparation method; the material can be used for preparing the high energy storage density capacitor; the dielectric constant of the prepared high energy storage density capacitor is improved to 37, the loss is reduced, the breakdown field strength is improved to 356.0MV / m, the energy storage density is improved to 20.5J.m<3>. The preparation method is simple to operate, high in efficiency and suitable for large-scale production; the prepared GR-TiO2-PVDF nano-composite material is excellent in dielectric property and has the advantages that the energy consumption can be effectively lowered, and the energy-saving performance is improved; the thickness of a dielectric membrane iscontrollable, is capable of being miniaturized and lightened and can be applied in an integrated circuit; the GR-TiO2-PVDF nano-composite material is higher in energy storage density, improved in storage capacity of electric energy and enhanced in capacity of uniformizing an electric field and suitable for application to preparation of the high energy storage density capacitor.

Description

technical field [0001] The invention belongs to the technical field of capacitor application materials, in particular to a GR-TiO used to prepare capacitors with high energy storage density 2 -PVDF nanocomposite material and its preparation method. Background technique [0002] As a very important energy storage device, capacitors are widely used in various fields such as home appliances, transportation, aviation, and aerospace. Today, with the rapid development of electronic integration technology, capacitors are also required to tend to the direction of integration, miniaturization, light weight and high stability. However, the dielectric material is an important part of the capacitor, and its energy storage performance largely determines the performance of the capacitor. Increasing the energy storage density of the dielectric material can effectively improve the capacitor's ability to store charges and uniform electric fields, and Capacitors can be made smaller and ligh...

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): C08L27/16C08K3/04C08K3/22C08J5/18H01G4/18H01G4/33H01G13/00
Inventor许仁俊陈建文王修才朱文博施淞瀚吴徐平叶大贵林浩勃陆江南黄穗龙朱珍
OwnerFOSHAN UNIVERSITY