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A kind of preparation method of film capacitor based on graphene composite film

A film capacitor and graphene composite technology, applied in the direction of film/thick film capacitors, laminated capacitors, fixed capacitor electrodes, etc., can solve the problems of not being able to use AC circuits, large capacitance, and high resistance of supercapacitors, and achieve compactness Good performance, high power density, and the effect of ensuring dielectric strength

Active Publication Date: 2017-10-10
HUBEI LONGCHEN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Micro-graphene supercapacitors have attracted worldwide attention because of their supercapacitor effects, but there is a big difference in the structure of this kind of micro-graphene supercapacitors and film capacitors. Supercapacitors are supercapacitors based on electrochemical principles, and generally need to cooperate with electrolysis The supercapacitor stores energy in the separated charge, the larger the area used to store the charge, the denser the separated charge, the greater its capacitance; due to the large internal resistance of the supercapacitor, it is often not used in AC circuits

Method used

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  • A kind of preparation method of film capacitor based on graphene composite film
  • A kind of preparation method of film capacitor based on graphene composite film
  • A kind of preparation method of film capacitor based on graphene composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as image 3 As shown, 1000ml mass concentration of 0.1mg / ml graphene oxide aqueous solution is poured into the coating tank, the production speed of the coating machine is controlled at 3m / s, and the feeding material 1 is a film for capacitors, which is transported by No. 2 and No. 3 conveying rollers. The graphene oxide aqueous solution is evenly coated on the film. In order to ensure that the coating thickness is controllable and the coating is uniform, the thickness of the graphene oxide layer is corrected by adjusting the angle and height of the 4 scrapers, and the thickness of the coating layer is controlled at The pressure roller 5 is adjusted to a suitable pressure of 3 bar to complete the stable adhesion of graphene oxide to the film, and then the tension leveling device 6 is used to maintain the composite film to have a good flattening effect for drying and curing. It is equipped with a drying device and the temperature is controlled at 100°C. The shearin...

Embodiment 2

[0034] Such as image 3As shown, 2000ml of graphene oxide aqueous solution with a mass concentration of 100mg / ml is poured into the coating tank, the production speed of the coating machine is controlled at 30m / s, the feeding material 1 is a film for capacitors, and the oxidized The graphene aqueous solution is evenly coated on the film. In order to ensure that the coating thickness is controllable and the coating is uniform, the thickness of the graphene oxide layer is corrected by adjusting the angle and height of the 4 scrapers, and the thickness of the coating layer is controlled at The pressure roller 5 is adjusted to a suitable pressure of 4 bar to complete the stable adhesion of graphene oxide to the film, and then the tension leveling device 6 is used to maintain the composite film to have a good flattening effect for drying and curing. It is equipped with a drying device and the temperature is controlled at 110°C. Be that the shearing roller 7# of 2.5bar and 8# reali...

Embodiment 3

[0037] Such as image 3 As shown, 2000ml of graphene oxide aqueous solution with a mass concentration of 50mg / ml is poured into the coating tank, the production speed of the coating machine is controlled at 15m / s, the feeding material 1 is a film for capacitors, and the oxidized The graphene aqueous solution is evenly coated on the film. In order to ensure that the coating thickness is controllable and the coating is uniform, the thickness of the graphene oxide layer is corrected by adjusting the angle and height of the 4 scrapers, and the thickness of the coating layer is controlled at The pressure roller 5 is adjusted to a suitable pressure of 3.5 bar to complete the stable adhesion of the graphene oxide to the film, and then the tension leveling device 6 is used to maintain a good flattening effect of the composite film for drying and curing, and is equipped with a drying device, and the temperature is controlled at 105°C , be sent to pressure by guide roller and be that t...

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Abstract

The invention discloses a method for preparing a thin film capacitor based on a graphene composite film. Not less than a coating layer; then, the film is sent into an oven with a temperature of 30-120 ° C for drying and curing; then, the film is mixed with a hydroiodic acid solution with a mass concentration of 1% to 50% in a flat state reaction; the reaction time is 5 to 90 minutes; then, the film is dried in an oven at a temperature of 30 to 120°C to obtain a composite film of graphene / insulating film; the composite film of graphene / insulating film is reserved for screen The tape is then cut, wound, and finally formed into a film capacitor. The obtained film capacitor based on the graphene composite film has high energy density and power density, can further reduce the volume of the capacitor, increase the capacitance, and reduce the cost.

Description

technical field [0001] The invention belongs to the field of film capacitors, and more specifically relates to a production technology of graphene composite film capacitors. Background technique [0002] Existing film capacitors use metallized composite films to make capacitors, that is, aluminum, zinc or other metals are heated and melted by a vacuum coating machine, and the surface layer of the substrate film is metallized under vacuum evaporation conditions to form capacitor electrodes. layer. The base material of traditional film capacitors is generally polypropylene and polyester film, and the thickness of the base material is thin; in order to obtain a large capacitance, the material needs to be rolled to a sufficient length, and the obtained film capacitor can be used in AC and DC circuits. The disadvantages of the film capacitor and its preparation method are that the structure of the metal coating is not dense and the impurity content is large, and the metal film l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/33H01G4/008
Inventor 潘旭祥宋华斌童慧明
Owner HUBEI LONGCHEN TECH CO LTD