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High-breakdown and high-energy-storage FPE and P (VDF-HFP)-based multilayer structure composite film and preparation method thereof

A VDF-HFP, composite film technology, applied in chemical instruments and methods, hybrid/electric double layer capacitor manufacturing, layered products, etc., can solve the problem of not having both high dielectric constant and high breakdown strength, and achieve Excellent breakdown strength, low leakage current, the effect of improving breakdown performance

Active Publication Date: 2022-05-31
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high breakdown and high energy storage FPE and P (VDF-HFP) based multilayer in order to solve the problem

Method used

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  • High-breakdown and high-energy-storage FPE and P (VDF-HFP)-based multilayer structure composite film and preparation method thereof
  • High-breakdown and high-energy-storage FPE and P (VDF-HFP)-based multilayer structure composite film and preparation method thereof
  • High-breakdown and high-energy-storage FPE and P (VDF-HFP)-based multilayer structure composite film and preparation method thereof

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specific Embodiment approach 1

[0021] Specific Embodiment 1: In this embodiment, a high breakdown and high energy storage FPE and P(VDF-HFP) based multilayer structure composite film is composed of one layer of P(VDF-HFP) film and two layers of FPE film, The P(VDF-HFP) film is arranged between two layers of FPE films, and the P(VDF-HFP) film and the two layers of FPE films are bonded through a hot pressing process.

specific Embodiment approach 2

[0022] Specific embodiment two: the preparation method of a kind of high breakdown and high energy storage FPE and P (VDF-HFP) base multilayer structure composite film of this embodiment, carry out according to the following steps:

[0023] 1. Add fluorene polyester to the methylpyrrolidone solution, and mechanically stir for 4-6 hours at a temperature of 15-25°C to obtain the FPE solution; evenly coat the FPE solution on one surface of the pretreated substrate, Then the substrate is subjected to gradient heating and heat preservation, and after cooling to room temperature, the film on the substrate is peeled off to obtain the FPE film;

[0024] 2. Add P(VDF-HFP) to the dimethylformamide solution, and mechanically stir for 4-6 hours at a temperature of 15-25°C to obtain a P(VDF-HFP) solution; add P(VDF-HFP) The solution is uniformly coated on one surface of the pretreated substrate, then the substrate is heated to 75-80°C, and kept at 75-80°C for 12-15h, and after cooling to r...

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the ratio of the mass of the fluorene polyester to the volume of the methylpyrrolidone solution in step 1 is (0.4-0.5) g: (3.5-4) mL.

[0030] Other steps are the same as in the second embodiment.

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Abstract

The invention discloses a high-breakdown and high-energy-storage FPE and P (VDF-HFP)-based multilayer structure composite film and a preparation method thereof, and relates to the technical field of composite film preparation. The invention aims to solve the problem that the traditional composite material film cannot have high dielectric constant and high breakdown strength at the same time. The method comprises the following steps: placing a P (VDF-HFP) film between two layers of FPE films, carrying out hot pressing process treatment, and finally cooling to obtain the FPE and P (VDF-HFP)-based multilayer structure composite film with high breakdown and high energy storage. The FPE and P (VDF-HFP) based multilayer structure composite film with high breakdown and high energy storage and the preparation method of the FPE and P (VDF-HFP) based multilayer structure composite film can be obtained.

Description

technical field [0001] The invention relates to the technical field of composite film preparation, in particular to an FPE and P(VDF-HFP)-based multilayer structure composite film with high breakdown and high energy storage and a preparation method thereof. Background technique [0002] To meet the increasing demands of modern electronic and power systems, the development of advanced energy storage materials is urgent. Polymer dielectrics are currently the material of choice for high energy density capacitors due to their high breakdown strength and excellent mechanical properties. However, the inherent low dielectric constant of polymer dielectrics limits its energy density. In order to increase the energy density of polymers, a lot of research has been done, such as introducing inorganic fillers with high dielectric constants into the polymer matrix to form polymer composite material. However, the increase in dielectric constant brought about by the introduction of high-...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/30B32B27/36H01G11/00H01G11/84B29D7/01
CPCB32B27/08B32B27/304B32B27/36H01G11/00H01G11/84B29D7/01B32B2307/206B32B2307/20B32B2307/302B32B2307/306B32B2457/16Y02E10/549
Inventor 冯宇管封蒋敏张文超
Owner HARBIN UNIV OF SCI & TECH
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