Graphene/ceramics composite dielectric film applied to capacitor and preparation method for graphene/ceramics composite dielectric film

A technology of dielectric film and graphene, which is applied in the direction of fixed capacitor dielectric and fixed capacitor parts, etc., can solve the problems of large dielectric loss, difficult processing of composite materials, high ceramic filling volume, etc., and achieve high dielectric constant, The effect of high energy density and simple process

Inactive Publication Date: 2019-05-07
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Polyvinylidene fluoride (PVDF) is widely used as a dielectric material in the field of electronics and power engineering technology. At present, it is more conventional to fill PVDF with ceramic particles with high dielectric constant to prepare ceramic / polyvinylidene fluoride. Composite dielectric film is used to improve the dielectric constant of polyvinylidene fluoride, but the high filling amount of ceramics makes the processing of composite materials difficult and the dielectric loss is large

Method used

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  • Graphene/ceramics composite dielectric film applied to capacitor and preparation method for graphene/ceramics composite dielectric film
  • Graphene/ceramics composite dielectric film applied to capacitor and preparation method for graphene/ceramics composite dielectric film

Examples

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Embodiment 1

[0046] Preparation of CCTO@GO: Add CCTO to the graphene oxide dispersion, ultrasonically disperse for 30 minutes, stir for 2 hours, add 10% ammonium chloride aqueous solution drop by drop while stirring, continue stirring for 2 hours after the dropwise addition, and then clean , suction filtration, and repeated cleaning 3 times to obtain flocs, put them in an oven and dry at 100°C for 1 hour, and prepare copper calcium titanate (CCTO@GO) coated with graphene oxide on the surface;

[0047] Preparation of CCTO@rGO: Copper calcium titanate (CCTO@GO) coated with graphene oxide was put into a tube furnace and calcined at 600 °C for 3 h under the protection of nitrogen atmosphere to prepare graphene-coated titanium copper calcium oxide (CCTO@rGO).

[0048] Silane-modified CCTO@rGO: Add copper calcium titanate (CCTO@rGO) coated with graphene into the γ-aminopropyltriethoxysilane solution, mix and stir for 3 hours, wash with deionized water and ethanol, Suction filtration, repeated c...

Embodiment 2-5

[0052] Its preparation process is the same as that of Example 1, the only difference being the different feed ratio, calcination temperature and calcination time. Specifically, the experimental conditions during the preparation of Examples 1-5 are shown in the table below.

[0053] Table 1 Example 1-5 experimental condition list

[0054]

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Abstract

The invention provides a graphene / ceramics composite dielectric film applied to a capacitor and a preparation method for the graphene / ceramics composite dielectric film. The preparation method comprises the steps: adding calcium copper titanate in a graphene oxide dispersion solution, then, adding a flocculant solution, carrying out cleaning, suction filtration and baking, and carrying out calcination, so as to obtain a graphene coated calcium copper titanate material; and subjecting the surface of the graphene coated calcium copper titanate material to modification with a silane coupler, mixing the modified graphene coated calcium copper titanate material with a polyvinylidene fluoride solution, and carrying out film forming and drying, thereby preparing the composite dielectric film. Thecomposite dielectric film prepared by the method has the advantages of high dielectric constant, low loss, high strength, high thermal stability, and the like and can be extensively applied to capacitors and the like. Moreover, the process is simple, the cost is low, and thus, large-scale production is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of dielectric materials, in particular to a graphene / copper calcium titanate composite dielectric film, its preparation method and application. Background technique [0002] With the rapid development of electronic technology, the demand for miniaturized and high-performance energy storage capacitors is becoming more and more urgent. In order to obtain high-performance energy storage capacitors, many researchers focus on the preparation of high energy storage density dielectric materials. In order to meet the needs of energy storage capacitors with light weight and high energy storage density, it is necessary to develop dielectric films with thin thickness, high dielectric constant and high withstand voltage. [0003] Polyvinylidene fluoride (PVDF) is widely used as a dielectric material in the field of electronics and power engineering technology. At present, it is more conventional to fill PVDF with ceram...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K9/10C08K3/24C08J5/18H01G4/20
Inventor 陈远强张易宁李伟陈素晶张祥昕王维刘永川苗小飞林俊鸿
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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