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Application of a composite film material as an energy storage material and its preparation method

A composite film and polymer technology, applied in the direction of thin film/thick film capacitors, fixed capacitance parts, laminated capacitors, etc., can solve the problem of low energy storage efficiency, achieve high energy storage efficiency, high temperature resistance, Effect of low dielectric loss

Active Publication Date: 2022-03-29
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its energy storage efficiency is low, about 50-60%

Method used

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  • Application of a composite film material as an energy storage material and its preparation method
  • Application of a composite film material as an energy storage material and its preparation method
  • Application of a composite film material as an energy storage material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A high-temperature-resistant composite film material based on submicron ceramic fillers includes a base polymer and a ceramic filler doped in the base polymer; the ceramic filler adopts barium titanate ceramic particles with a particle size of 500nm. The ceramic filler is surface modified to enhance the compatibility of the ceramic filler and the polymer matrix. The base polymer adopts PMMA. The mass fraction of the ceramic filler in the composite film material is 3%.

[0037] The surface modification of barium titanate ceramic particles with a particle size of 500nm enhances the compatibility between the ceramic filler and the polymer matrix; after dissolving the PMMA as the base polymer with a polar solvent, adding a certain amount of titanium Put the barium acid ceramic particles into the PMMA solution to prepare a composite solution, cast the composite film material by casting method, dry it at 150-250°C to obtain the composite material, and obtain the PMMA / DBT (50...

Embodiment 2

[0047] The aforementioned preparation method based on submicron ceramic filler high temperature resistant composite film material (i.e. PMMA / DBT (500nm) composite material) comprises the following processing steps:

[0048] (1) Add a certain amount of base polymer into the polar solution, place it at 40-80°C and stir it for 6-12 hours until it is completely dissolved to form a clear and transparent polymer solution; the material of base polymer and polar solution The liquid ratio is 3-100g / L. The base polymer adopts PMMA.

[0049] (2) Adding a certain amount of surface-modified ceramic filler into the polymer solution obtained in step (1), fully stirring, ultrasonically vibrating, and so on for 2 to 5 times to form a stable suspension. The ceramic filler adopts barium titanate particles with a particle size of 500nm; the solid-liquid ratio of the ceramic filler to the polymer solution is 1-100g / L.

[0050] (3) Apply the suspension obtained in step (2) evenly to a glass sheet...

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Abstract

The invention discloses a high-temperature-resistant composite film material based on submicron ceramic fillers and a preparation method thereof. Film capacitors are used in the field of electronic information, and there will be a lot of heat dissipation, and they need to withstand a certain temperature, such as working at 70°C for a long time. The present invention is a high-temperature-resistant composite film material based on submicron ceramic fillers, which includes a base polymer and ceramic fillers doped in the base polymer; the ceramic fillers use barium titanate ceramic particles with a particle size of 60-900 nm , the ceramic particles are modified with surfactants. The base polymer is PMMA. Compared with the PVDF polymer, the present invention has stronger energy storage performance stability in a high-temperature environment of 70° C., and still has higher energy storage density and energy storage efficiency. In the invention, the 500nm barium titanate ceramic filler is added in the linear dielectric PMMA, so that the breakdown strength of the composite material increases the most, and simultaneously improves the energy storage density and energy storage efficiency.

Description

technical field [0001] The invention belongs to the technical field of preparation of electronic functional materials, and in particular relates to a preparation method of a high-energy-storage density and high-efficiency composite film material based on submicron ceramic fillers capable of resisting high temperatures. Background technique [0002] With the development of information technology, film capacitors are crucial in the fields of electronic equipment and microelectronics, such as inverters, pulse power devices, etc. With the rapid reduction in the size of capacitors on printed circuit boards, the study of new thin and high dielectric materials has become a frontier topic in the field of information functional materials and microelectronics. [0003] Common capacitor materials include polymer materials and ceramic materials. Polymers have high Young's modulus and high dielectric field strength. The breakdown field strength of polymers is close to 400MV / m, but the di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08K9/06C08K9/04C08K3/24C08J5/18C08J7/00H01G4/06H01G4/33
CPCC08J5/18C08J7/08H01G4/06H01G4/33C08J2333/12C08K9/06C08K9/04C08K3/24C08K2201/011
Inventor 李丽丽徐鑫鑫楼旱雨吴薇王高峰
Owner HANGZHOU DIANZI UNIV
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