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Preparation method for preparing electrode of graphene super capacitor via screen printing method

A technology of supercapacitor and screen printing method, which is applied in the preparation of graphene electrodes, the preparation of electronic components, and the field of graphene, which can solve the problems of affecting the conductivity of electrodes, difficulty in mass production, and internal resistance of electrodes, so as to avoid reduction Insufficient effect

Inactive Publication Date: 2018-03-23
NANJING XUYURUI MATERIAL TECH CO LTD
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Problems solved by technology

The disadvantage of this method is that the prepared thin film material is greatly affected by the laser power and the oxidation degree of graphene oxide during the laser engraving process, which leads to non-repeatable electrode production and is difficult to achieve mass production.
At the same time, in order to improve the efficiency of laser reduction, chemical reducing agents are often added for auxiliary reduction in production, and such chemical reducing agents remain in the graphene electrode, which greatly affects the conductivity of the electrode.
[0005] The present invention proposes a method for preparing graphene interdigitated electrodes, which can solve the problem of electrode internal resistance and realize mass production

Method used

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  • Preparation method for preparing electrode of graphene super capacitor via screen printing method

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Embodiment 1

[0023] First, react 1g of graphite with 23ml of concentrated sulfuric acid and 0.4g of sodium nitrate for 8 hours at a temperature of 4°C, add 4g of potassium permanganate to the reactant, react at 80°C for 3 hours, add 40ml of water, and add 5ml of hydrogen peroxide to prepare oxidised graphite;

[0024] Sodium hydroxide was added to the obtained graphite oxide solution, the pH was adjusted to 8, the ultrasonic wave was added for 30 minutes, and the reducing agent vitamin C was added. The mass ratio of vitamin C to graphite oxide was 1:3 to obtain a reduced graphene solution.

[0025] Next, the graphene solution is centrifuged, filtered, and dried to obtain graphene powder. ,

[0026] The graphene powder is mixed with the active material and PVDF, and dissolved in an organic solvent, wherein the mass fraction of the graphene powder is 30%, and the mass ratio of the active material to PVDF is 9:2, and the electrode slurry is prepared.

[0027] Using a screen printer, print i...

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Abstract

The invention discloses a preparation method for preparing an electrode of a graphene super capacitor via a screen printing method. The preparation method comprises the following steps that 1) oxidized graphite is prepared; b) the oxidized graphite is reduced to obtain graphene powder; c) the graphene powder is configured into a slurry; and d) the slurry is printed at the target substrate surfacein the screen printing method to obtain a graphene electrode.

Description

technical field [0001] The invention relates to the field of preparation of electronic components, in particular to the technical field of preparation of graphene and graphene electrodes. Background technique [0002] In recent years, supercapacitors have played an increasingly important role in energy storage materials due to their advantages of high energy, fast charge and discharge, high power density, and long cycle life. In consideration of environmental protection and the design and development of the power system of electric vehicles, a single battery cannot meet the requirements of the power system, and a hybrid power supply obtained by connecting high-power density electrochemical capacitors and high-density batteries in parallel can meet the needs of high power density. And energy recovery can be realized. [0003] The most critical component of a supercapacitor is the electrode material. Due to the characteristics of graphene such as high conductivity, high to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36
CPCY02E60/13H01G11/86H01G11/36
Inventor 朱洋邵蓉
Owner NANJING XUYURUI MATERIAL TECH CO LTD
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