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A core-shell structure nanofiber/polyvinylidene fluoride based high energy storage film and its preparation method

A technology of polyvinylidene fluoride and core-shell structure, which is applied in fiber processing, filament/wire forming, fixed capacitor parts, etc., and can solve the problems of unreachable application level, low energy storage density, limited promotion and application, etc. problem, to achieve the effect of simple process and required equipment, improved breakdown field strength, and low cost

Inactive Publication Date: 2019-09-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because dielectric capacitors have many advantages such as high power density, fast charging and discharging, long cycle, simple structure, and no pollution, they have made great progress in the field of energy storage, but their low energy storage density limits their wider promotion. and application
Polyvinylidene fluoride (PVDF) is a polymer with a stable chemical structure and has good electrical insulation and dielectric properties. It is often used as a dielectric energy storage material, but due to its low energy storage density, it cannot be used alone Unable to reach application level

Method used

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  • A core-shell structure nanofiber/polyvinylidene fluoride based high energy storage film and its preparation method
  • A core-shell structure nanofiber/polyvinylidene fluoride based high energy storage film and its preparation method
  • A core-shell structure nanofiber/polyvinylidene fluoride based high energy storage film and its preparation method

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Embodiment 1

[0036] A core-shell structure nanofiber / polyvinylidene fluoride-based high-energy storage film, the core-shell structure nanofiber / polyvinylidene fluoride-based high-energy storage film contains a certain volume of crystallized copper calcium titanate@alumina nano Fiber, the copper calcium titanate@alumina nanofiber has a core-shell structure, the core layer is copper calcium titanate, and the shell layer is alumina.

[0037] A method for preparing a core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film is as follows:

[0038] step one:

[0039]Calcium nitrate tetrahydrate, copper acetate monohydrate, n-tetrabutyl titanate and acetic acid are prepared in a certain molar ratio, polyvinylpyrrolidone and dehydrated alcohol are prepared according to a certain mass volume ratio; the prepared dehydrated alcohol and acetic acid are mixed and mixed After stirring evenly, add copper acetate monohydrate and make it completely dissolved, then add calcium ...

Embodiment 2

[0049] A core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film, the core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film contains Crystallized copper calcium titanate@alumina nanofibers with a volume of 2-6% of the energy storage film, the copper calcium titanate@alumina nanofibers have a core-shell structure, the core layer is copper calcium titanate, and the shell layer is oxide aluminum.

[0050] A method for preparing a core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film, characterized in that the steps of the preparation method are as follows:

[0051] step one:

[0052] Prepare calcium nitrate tetrahydrate, copper acetate monohydrate, n-tetrabutyl titanate and acetic acid at a molar ratio of 1:3:4:7.94, prepare polyvinylpyrrolidone and absolute ethanol at a mass-volume ratio of 1g:20mL; prepare After mixing absolute ethanol with acetic acid and stirring evenly, add copper...

Embodiment 3

[0062] A core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film, the core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film contains Crystallized copper calcium titanate@alumina nanofibers with 2% volume of the energy storage film, the copper calcium titanate@alumina nanofibers have a core-shell structure, the core layer is copper calcium titanate, and the shell layer is alumina.

[0063] A method for preparing a core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film, characterized in that the steps of the preparation method are as follows:

[0064] step one:

[0065] Weigh 0.208g calcium nitrate tetrahydrate and 0.527g copper acetate monohydrate at a molar ratio of 1:3:4:7.94, measure 1.2ml n-tetrabutyl titanate and 0.4ml acetic acid, and measure 1g according to the mass-volume ratio of 1g:20mL Polyvinylpyrrolidone and 20ml of absolute ethanol; after mixing absolute ethanol and aceti...

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Abstract

The invention belongs to the field of dielectric capacitors, and particularly relates to a core-shell structure nanofiber / polyvinylidene fluoride high-energy-storage film and a preparation method thereof. The preparation method comprises the following steps: firstly, through a coaxial electrostatic spinning technology and a muffle furnace calcination technology, preparing a crystalized copper calcium titanate@aluminium oxide nanofiber with a core-shell structure; through a fusion blending method, evenly dispersing the copper calcium titanate@aluminium oxide nanofiber of a certain volume into apolyvinylidene fluoride matrix; then, through a film coating and quenching technology, obtaining the core-shell structure nanofiber / polyvinylidene fluoride high-energy-storage film. The high-energy-storage film prepared by the preparation method has higher relative dielectric constant, breakdown field strength and energy storage and lower electrical conductivity and loss, and the technical problem of lower energy storage density of a dielectric medium capacitor is solved. The preparation method and technology and required equipment have the advantages of simpleness, low cost and easiness in implementation.

Description

technical field [0001] The invention belongs to the field of dielectric capacitors, in particular to a core-shell structure nanofiber / polyvinylidene fluoride-based high energy storage film and a preparation method thereof. Background technique [0002] With the continuous increase of energy demand and the continuous consumption of traditional energy, the problems of improving the utilization efficiency of traditional energy and expanding the practical scope of energy have become increasingly prominent. Energy storage and the integration of energy into the grid are important foundations for the mass production of electric vehicles and the continued development of portable electronic devices. Because dielectric capacitors have many advantages such as high power density, fast charging and discharging, long cycle, simple structure, and no pollution, they have made great progress in the field of energy storage, but their low energy storage density limits their wider promotion. a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K7/08C08J5/18D01F9/08D01D5/34H01G4/20
Inventor 张天栋王绪彬迟庆国张昌海陈庆国王暄赵洪
Owner HARBIN UNIV OF SCI & TECH
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