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Preparation method of composite carbon-based film electrode for broadband decoupling supercapacitor

A technology for supercapacitors and thin-film electrodes, which is applied in the field of preparation of composite carbon-based thin-film electrodes, can solve problems such as difficulty in dealing with high-frequency electrical noise decoupling, poor frequency response performance, and slow ion mobility, and achieve good electrical noise decoupling. performance, stable decoupling capability, effect of stable electrical noise decoupling performance

Active Publication Date: 2022-04-29
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, activated carbon has a large specific surface area and can provide a large specific capacity, but its pore structure is narrow and complex, the ion migration rate is slow, and the frequency response performance is poor, so it is difficult to cope with the decoupling of high-frequency electrical noise.
In addition, although the reported vertical graphene and vertically aligned carbon nanotubes have good frequency characteristics, a large number of literatures have reported that the edge structure of graphene has anomalous magnetism, which will highlight the effect of its parasitic inductance on frequency at high frequencies. However, the preparation process of vertically oriented carbon nanotubes is relatively complicated, and the synthesis is difficult, and there are graphite edges at the interface between carbon nanotubes and catalyst nanoparticles, which will also bring abnormal magnetism and parasitic inductance

Method used

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  • Preparation method of composite carbon-based film electrode for broadband decoupling supercapacitor
  • Preparation method of composite carbon-based film electrode for broadband decoupling supercapacitor
  • Preparation method of composite carbon-based film electrode for broadband decoupling supercapacitor

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preparation example Construction

[0063] The present invention is a kind of preparation method (abbreviation method) of the composite carbon-based film electrode that is used for broadband decoupling supercapacitor, comprises the following steps:

[0064] Step 1. Put 2mmol of nickel chloride hexahydrate, 4mmol of ferric chloride hexahydrate and 16mmol of sodium oleate as reactants and mix them evenly in a beaker; add 10mL of deionized water, 10mL of ethanol and 20mL of n-hexane into the beaker as solvents , heating and refluxing at a temperature of 40-80°C for 2-6 hours to fully react the reactant and the solvent to obtain a suspension of iron-nickel oleate;

[0065] Clean the iron-nickel oleate suspension, dry the cleaned iron-nickel oleate suspension at a temperature of 80-160°C for 4-12 hours, and remove the moisture in the iron-nickel oleate suspension , to obtain iron nickel oleate precursor;

[0066] Step 2. Put the iron-nickel oleate precursor obtained in step 1 into a reaction vessel, add 1-octadecene...

Embodiment 1

[0077] The preparation method of the composite carbon-based thin film electrode for broadband decoupling supercapacitor of this embodiment specifically includes the following steps:

[0078] Step 1. Preparation of iron-nickel oleate precursor: 2mmol nickel chloride hexahydrate, 4mmol ferric chloride hexahydrate and 16mmol sodium oleate were used as reactants, and mixed evenly in a beaker; 10mL deionized water, 10mL ethanol Add 20mL of n-hexane as a solvent into the beaker, and heat to reflux at 60°C for 4 hours to fully react the reactant with the solvent to obtain a suspension of iron-nickel oleate;

[0079] Clean the iron-nickel oleate suspension, that is, add 20 mL of deionized water to the iron-nickel oleate suspension, let it stand for 5 minutes, layer the iron-nickel oleate suspension and separate the supernatant; Add 20mL deionized water to the beaker again, separate the supernatant after standing, and obtain the iron-nickel oleate suspension after cleaning;

[0080] D...

Embodiment 2

[0091] The difference between this embodiment and Example 1 is that the volume of the nickel ferrite nanoparticle dispersion added dropwise in step 4 is 800 μL, and the volume of the n-hexane dispersion of activated carbon added dropwise in step 5 is 40 uL, that is, nickel ferrite The ratio of nanoparticle dispersion to activated carbon n-hexane dispersion is 20:1.

[0092] Fig. 1 (a), (b) are the transmission electron micrograph and the scanning electron micrograph of the composite carbon-based thin film that the present embodiment makes respectively; Between the carbon nano-onion and the nickel sheet, be connected by graphene film, activated carbon nano-particle and The graphene film is also connected with the carbon nano-onion to form a whole.

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Abstract

The invention relates to a preparation method of a composite carbon-based film electrode for a broadband decoupling supercapacitor, which comprises the following steps: firstly, preparing an iron nickel oleate precursor, and preparing a nickel ferrite nanoparticle solution by using the iron nickel oleate precursor; then, adding normal hexane into the nickel ferrite nanoparticle solution to obtain a nickel ferrite nanoparticle dispersion liquid, self-assembling the nickel ferrite nanoparticle dispersion liquid to form a nickel ferrite nanoparticle film, and depositing the nickel ferrite nanoparticle film on the surface of a nickel sheet; and finally, dropwise adding the prepared normal hexane dispersion liquid of the activated carbon onto the nickel ferrite nanoparticle film to form a mixed film on the surface of the nickel sheet, and performing catalytic reduction and chemical vapor deposition growth on the nickel sheet coated with the mixed film to form a composite carbon-based film on the surface of the nickel sheet, namely the composite carbon-based film electrode. The composite carbon-based thin film is of an interconnection structure formed by carbon nano onions, activated carbon nano particles and a graphene thin film, and the supercapacitor based on the composite carbon-based thin film electrode has good decoupling performance.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode preparation, and in particular relates to a method for preparing a composite carbon-based film electrode. The supercapacitor prepared based on the composite carbon-based film electrode has an 5 It has good decoupling performance in Hz wide frequency range. Background technique [0002] With the development of science and technology and the improvement of human needs, electronic products tend to be highly integrated and miniaturized. Electrical noise is ubiquitous in electronic circuits, and the frequency of electrical noise is not constant and uncontrollable, which will seriously affect the working stability of electronic components. Decoupling capacitors are commonly used to decouple electrical noise at a constant voltage, so decoupling capacitors play an important role in electronic circuits. In a digital integrated circuit, the output electrical signal is directly related to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/36H01G11/34H01G11/28
CPCH01G11/86H01G11/24H01G11/30H01G11/36H01G11/34H01G11/28Y02E60/13
Inventor 张晨光赵青松
Owner TIANJIN UNIVERSITY OF TECHNOLOGY