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Preparation method of graphene electrode material

A graphene electrode and graphene technology, which is applied in hybrid capacitor electrodes, metal material coating technology, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of low specific capacity of electrode materials, so as to improve specific capacitance value and energy Density, strong operability, and the effect of improving energy storage performance

Inactive Publication Date: 2020-01-17
常江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a two-dimensional monolayer material, graphene has high specific surface area and electrical conductivity, but due to the influence of ionic liquid in the electrolyte on the electrode material's infiltration, the specific capacity of the electrode material is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A kind of preparation method of graphene electrode material of the present invention is in, concretely implement according to the following steps:

[0020] Step 1. Prepare graphene oxide, press it into a tablet under a pressure condition of 15-18MPa by a tablet press after grinding, and obtain a graphene oxide target;

[0021] Step 2. Soak the nickel foam in dilute hydrochloric acid for 15-20 minutes, remove the surface oxide, rinse it with deionized water, and place it together with the graphene oxide target in a plasma-enhanced chemical vapor deposition vacuum device for deposition for 70- 80min, the temperature in the plasma-enhanced chemical vapor deposition vacuum device is 850°C-900°C, the pressure is 1000Pa, the radio frequency power is 100W-260W, and the gas flow rate of the protective gas is 150sccm, and the deposited graphene oxide target and Nickel foam substrate;

[0022] Step 3. Use a pulsed laser to focus the laser beam onto the deposited graphene oxide t...

Embodiment 1

[0025] The present embodiment provides a kind of preparation method of graphene electrode material, specifically implement according to the following steps:

[0026] Step 1. Prepare graphene oxide, and after grinding, press it into a tablet under a pressure condition of 15MPa by a tablet press to obtain a graphene oxide target;

[0027] Step 2. Soak the nickel foam in dilute hydrochloric acid for 15 minutes to remove the surface oxide, then rinse it with deionized water, and place it together with the graphene oxide target in a plasma-enhanced chemical vapor deposition vacuum device for 70 minutes after drying. The temperature in the enhanced chemical vapor deposition vacuum device is 850°C, the pressure is 1000Pa, the radio frequency power is 100W, and the gas flow rate of the protective gas is 150sccm, and the deposited graphene oxide target and foamed nickel substrate are obtained;

[0028] Step 3. Use a pulsed laser to focus the laser beam onto the deposited graphene oxide...

Embodiment 2

[0031] The present embodiment provides a kind of preparation method of graphene electrode material, specifically implement according to the following steps:

[0032] Step 1. Prepare graphene oxide, and after grinding, press it into a tablet under the pressure condition of 18MPa by a tablet press to obtain a graphene oxide target;

[0033] Step 2. Soak the nickel foam in dilute hydrochloric acid for 20 minutes to remove the surface oxide, then rinse it with deionized water, and after drying, place it together with the graphene oxide target in a plasma-enhanced chemical vapor deposition vacuum device for deposition for 80 minutes. The temperature in the enhanced chemical vapor deposition vacuum device is 900°C, the pressure is 1000Pa, the radio frequency power is 260W, and the gas flow rate of the protective gas is 150sccm, and the deposited graphene oxide target and foamed nickel substrate are obtained;

[0034] Step 3. Use a pulsed laser to focus the laser beam onto the deposi...

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Abstract

The invention discloses a preparation method of a graphene electrode material. The preparation method comprises the following steps of preparing a graphene oxide target material, depositing the graphene oxide target material, focusing a laser beam to the graphene oxide target material, depositing again to obtain a primary graphene electrode material, grinding and sieving the primary graphene electrode material, then uniformly mixing the primary graphene electrode material with an organic carbon source and a catalyst, and then performing heat treatment, and cooling to room temperature to finally obtain the graphene electrode material. According to the present invention, the energy storage performance of the graphene electrode material is improved, the specific capacitance value and the energy density of the graphene electrode material are further improved, and the preparation method has the wide application value.

Description

technical field [0001] The invention belongs to the technical field of electrochemical capacitors, and in particular relates to a preparation method of a graphene electrode material. Background technique [0002] Among carbon materials, graphene with high specific surface area and excellent conductivity is an ideal supercapacitor electrode material, which can improve the power density and energy density of supercapacitors, and is expected to become a new generation of supercapacitor electrode materials with low price and superior performance. As a two-dimensional monolayer material, graphene has high specific surface area and electrical conductivity, but due to the influence of ionic liquid in the electrolyte on the electrode material's infiltration, the specific capacity of the electrode material is low. Contents of the invention [0003] The purpose of this invention is to provide a kind of preparation method of graphene electrode material, has improved the specific capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86C23C14/06C23C14/28C23C16/26C23C16/513
CPCC23C14/0605C23C14/28C23C16/26C23C16/513H01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 常江
Owner 常江