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Preparation and energy storage performance optimization method of all-organic composite dielectric

A technology of composite dielectric and optimization method, which is applied in the direction of fixed capacitor dielectric and components of fixed capacitor, etc., can solve the problems of low energy storage density and low breakdown strength of the medium, so as to improve the dielectric constant, improve the breakdown strength, The effect of excellent mechanical properties

Pending Publication Date: 2021-09-17
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of low dielectric energy storage density and low breakdown strength, and to provide a method for preparing an all-organic composite dielectric and optimizing its energy storage performance

Method used

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  • Preparation and energy storage performance optimization method of all-organic composite dielectric
  • Preparation and energy storage performance optimization method of all-organic composite dielectric
  • Preparation and energy storage performance optimization method of all-organic composite dielectric

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Embodiment 1

[0032] A method for preparing an all-organic composite dielectric and optimizing its energy storage performance, characterized in that the method utilizes polyvinylidene fluoride and is respectively blended with organic polymers such as PI, PESU, CR-C, and CR-S to prepare Complete organic dielectrics.

[0033] The steps of an all-organic composite dielectric preparation and energy storage performance optimization method are as follows:

[0034] step one:

[0035] The PI, PESU, CR-C and CR-S were placed in a blast drying oven for heat treatment at a temperature of 60 °C for 6 h. After that, use a digital balance to weigh five parts of 1-2g polyvinylidene fluoride powder in turn and place them in a beaker, use a pipette to weigh 10-20ml of DMF solution and add them to the beaker, and put the dried 0.1-0.5g PI into the beaker. , 0.1~0.5g PESU, 0.1~0.5g CR-C, 0.1~0.5g CR-S were added to DMF in turn and stirred at room temperature until completely dissolved, and stirred at room t...

Embodiment 2

[0045] A method for preparing an all-organic composite dielectric and optimizing its energy storage performance, characterized in that the method utilizes polyvinylidene fluoride and is respectively blended with organic polymers such as PI, PESU, CR-C, and CR-S to prepare Complete organic dielectrics.

[0046] The steps of an all-organic composite dielectric preparation and energy storage performance optimization method are as follows:

[0047] step one:

[0048] The PI, PESU, CR-C and CR-S were placed in a blast drying oven for heat treatment at a temperature of 60 °C for 6 h. After that, five parts of 1.9g polyvinylidene fluoride powder were weighed in turn with a digital balance and placed in a beaker, and 20ml of DMF solution was weighed into the beaker with a pipette. The dried 0.1g PI, 0.1g PESU, 0.1g CR-C and 0.1g CR-S were added to DMF in turn and stirred at room temperature until completely dissolved, and stirred at room temperature for 12h until the solution was un...

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Abstract

The invention discloses a preparation and energy storage performance optimization method of an all-organic composite dielectric, and relates to a dielectric material with high energy storage density and relatively high breakdown. The invention aims to solve the problems of high dielectric loss and low energy storage density of a dielectric capacitor material at the present stage. The experimental method comprises the following steps: preparing a polyvinylidene fluoride (PVDF)-based all-organic composite dielectric film by adopting a solution method and a blade coating process, and selecting organic polymers such as linear dielectric materials including polyimide (PI), polyether sulfone (PESU), cyanoethyl cellulose (CR-C), cyanoethyl amylopectin (CR-S) and the like as a filling phase which accounts for a relatively small amount in a composite dielectric, wherein the linear dielectric material generally has good high-temperature stability, relatively high insulating strength and relatively low dielectric loss. In order to obtain a compact PVDF-based composite dielectric film and promote the combination of PVDF molecules with PI, PESU, CR-C and CR-S molecules to be more stable, the PVDF-based dielectric film is subjected to high-temperature hot pressing and quenching treatment. The preparation process is simple and convenient, the researched and developed all-organic composite film medium has good breakdown strength and relatively high energy storage density, and meanwhile, the excellent electrical insulation and mechanical properties of the polymer are maintained. The invention belongs to the field of energy storage medium preparation and energy storage application.

Description

technical field [0001] The invention belongs to the field of dielectric capacitors, and in particular relates to a method for preparing an all-organic composite dielectric film with uniform and stable structure and optimizing the energy storage performance. Background technique [0002] All-organic composite media based on polyvinylidene fluoride (PVDF) blended with organic media have the advantages of good compatibility, good toughness, simple molding, and high breakdown strength, and have broad application prospects in the field of dielectric energy storage. Since PVDF, as a ferroelectric polymer dielectric material, has high polarization and dielectric constant, the corresponding dielectric loss is also relatively high. Therefore, how to improve the energy storage density of the composite medium based on polyvinylidene fluoride and reduce its dielectric loss has become the focus and difficulty of obtaining composite materials with excellent performance. Organic polymers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L79/08C08L81/06C08L1/28C08L3/08H01G4/18
CPCC08J5/18H01G4/18C08J2379/08C08J2381/06C08J2301/28C08J2303/08
Inventor 张月李森迟庆国张昌海王暄
Owner HARBIN UNIV OF SCI & TECH