A kind of high energy storage density dielectric composite multilayer film and its preparation method

A high energy storage density, multi-layer film technology, applied in the direction of coating, can solve the problem of unsatisfactory effect and other problems, and achieve the effect of remarkable thermal oxidation stability, small dielectric, and good thermal conductivity
CN110862683BActive Publication Date: 2021-02-09HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2021-02-09

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Abstract

The invention belongs to the field of film materials, and discloses a dielectric composite multilayer film with high energy storage density and a preparation method thereof. The composite multilayer film comprises a top layer, a middle layer and a bottom layer, wherein the top layer and the bottom layer are both made of PEI; the middle layer is made of PVDF, the middle layer is filled with Ag-coated nano BaTiO3 particles, the maximum energy storage performance of the composite multilayer film reaches 20.6-21.3 J / cm<3> under the electric field intensity of 500-650 MV / m, and the maximum energy storage efficiency reaches 80-82%. Meanwhile, the invention also discloses a preparation method of the composite multilayer film. According to the invention, the energy storage density, the energy storage efficiency, the breakdown field intensity and the temperature stability of the dielectric material are effectively improved.
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Description

technical field

[0001] The invention belongs to the field of film materials, and more specifically relates to a high energy storage density dielectric composite multilayer film and a preparation method thereof. Background technique

[0002] In order to meet the increasing demand for electrical energy, the development of energy storage devices has received extensive attention. Among the existing electrical energy storage devices, dielectric capacitors are the only electrical energy storage devices that simultaneously possess the advantages of ultrafast charge and discharge capability, high operating voltage, and ultrahigh power density. Therefore, developing high-efficiency dielectric capacitors has become a goal of modern electronic devices or power systems, such as high-frequency inverters, medical equipment, pulse power generation, power factor correction, and hybrid vehicles.

[0003] However, the average low energy density of dielectric capacitors compared with batterie...

Claims

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