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A kind of electrical energy storage dielectric ceramic/polymer composite material and preparation method thereof

A technology of composite materials and dielectric ceramics, applied in chemical instruments and methods, synthetic resin layered products, lamination, etc., can solve the problem that the energy storage performance of ceramic/polymer composite materials will not be significantly improved, and achieve improved Dielectric breakdown field strength, high electrical energy storage density, and the effect of avoiding breakdown

Active Publication Date: 2016-08-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This situation leads to no significant improvement in the energy storage performance of ceramic / polymer composites with simple structures, and the energy storage density is usually limited to 10J / cm 3 the following

Method used

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  • A kind of electrical energy storage dielectric ceramic/polymer composite material and preparation method thereof
  • A kind of electrical energy storage dielectric ceramic/polymer composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In this embodiment, polyvinylidene fluoride (PVDF) is used as the matrix, and nano barium titanate (BaTiO 3 ) particles (particle diameter less than 500 nanometers) are fillers. In this embodiment, the volume fraction of the filler in the upper and lower layers of the electrical energy storage medium ceramic / polymer composite is 10%, and the volume fraction of the filler in the middle layer is 1%. The overall thickness of the composite material is 20 microns, wherein the lower layer is 5 microns thick, the middle layer is 10 microns thick, and the upper layer is 5 microns thick.

[0034] The preparation method of the electric energy storage medium ceramic / polymer composite material is as follows:

[0035] 1) Weigh three parts of PVDF and dissolve them in three parts of mixed solvents of acetone and butanone respectively by magnetic stirring to obtain three parts of polymer solutions, wherein the mass ratio of polymer to solvent in each part of polymer solution is 1:10...

Embodiment 2

[0042] In this embodiment, polyvinylidene fluoride (PVDF) is used as the matrix, and nano barium titanate (BaTiO 3 ) particles (particle diameter less than 500 nanometers) are fillers. In this embodiment, the volume fraction of the filler in the upper and lower layers of the electric energy storage medium ceramic / polymer composite material is 20%, and the volume fraction of the filler in the middle layer is 1%. The overall thickness of the composite material is 20 microns, wherein the lower layer is 5 microns thick, the middle layer is 10 microns thick, and the upper layer is 5 microns thick.

[0043] The preparation method of the electric energy storage medium ceramic / polymer composite material is as follows:

[0044] 1) Weigh three parts of PVDF and dissolve them in three parts of mixed solvents of acetone and butanone respectively by magnetic stirring to obtain three parts of polymer solutions, wherein the mass ratio of polymer to solvent in each part of polymer solution i...

Embodiment 3

[0051] In this embodiment, polyimide (PI) is used as the matrix, and nano-titanium dioxide (TiO 2 ) particles (particle diameter less than 500 nanometers) are fillers. In this embodiment, the volume fraction of the filler in the upper and lower layers of the electrical energy storage medium ceramic / polymer composite is 10%, and the volume fraction of the filler in the middle layer is 1%. The overall thickness of the composite material is 20 microns, wherein the lower layer is 5 microns thick, the middle layer is 10 microns thick, and the upper layer is 5 microns thick.

[0052] The preparation method of the electric energy storage medium ceramic / polymer composite material is as follows:

[0053] 1) Weigh three parts of PI, and use magnetic stirring to dissolve it in three parts of dimethylformamide respectively to obtain three parts of polymer solutions, wherein the mass ratio of polymer to solvent in each part of polymer solution is 1: 20. The time for stirring and dissolvi...

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Abstract

The invention provides an electric energy storage dielectric ceramic / polymer composite material and a preparing method thereof. A three-layer structure serves as a design basis, a polymer serves as a basic material, nano ceramic dielectric filler with different volume fractions is added into the three-layer structure to form the ceramic / polymer composite material. The volume fraction of the ceramic filler in the middle layer is relatively low (smaller than 5%), and the volume fraction of the ceramic filler in the upper layer and the volume fraction of the ceramic filler in the lower layer are relatively high (10-50%). By means of the dielectric property difference between different layers, the distribution of an electric field in the composite material can be effectively controlled, so that the dielectric breakdown field strength (300-500 MV / m) of the material is greatly increased, and finally extremely high electric energy storage density (10-20J / cm<3>) is obtained. By means of the good characteristics of the material, the material can be used in the field of novel energy storage devices, wearable electronic devices, pulse power devices, hybrid power vehicles and the like.

Description

technical field [0001] The invention belongs to the field of ceramic / polymer composite materials, and in particular relates to an electric energy storage medium ceramic / polymer composite material and a preparation method thereof. Background technique [0002] With the rapid development of the electronics industry, there is a great demand for the innovation of energy storage power systems, so the research on energy storage materials is imminent. Compared with other energy storage devices, dielectric capacitors have unique advantages in the following aspects: fast charge and discharge characteristics, high power density, etc., but their low energy storage density has become a major bottleneck for their further development. For example, for BOPP (biaxially oriented polypropylene) materials, which are widely used in commerce, the energy storage density is less than 4J / cm 3 . Therefore, polymer matrix composites with high energy storage density have attracted more and more atte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K3/24B32B27/06B32B27/20B32B27/30B32B37/02
Inventor 汪宏王轶飞向锋崔金
Owner XI AN JIAOTONG UNIV
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