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Porous three-dimensional graphene supercapacitor electrode material and preparation method thereof

A supercapacitor electrode, three-dimensional porous technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc. Problems such as low material utilization rate, to achieve the effect of improving electrical conductivity, reducing process time, and reducing energy consumption

Active Publication Date: 2018-08-31
河南格拉芬新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the specific surface area of ​​the existing electrode material is too small, the commonly used method of preparing the current collector to coat the active material has a low utilization rate of the active material, and the prepared electrode has a large internal resistance, so it cannot meet the large capacity of the supercapacitor Energy storage and fast charging and discharging performance issues

Method used

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  • Porous three-dimensional graphene supercapacitor electrode material and preparation method thereof
  • Porous three-dimensional graphene supercapacitor electrode material and preparation method thereof
  • Porous three-dimensional graphene supercapacitor electrode material and preparation method thereof

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Embodiment 1

[0031] The present embodiment provides a kind of preparation method of three-dimensional porous graphene supercapacitor electrode material, the flow process of this method is as follows figure 1 As shown, the specific steps are as follows:

[0032] Step 1, the commercial three-dimensional nickel foam is washed with deionized water and ethanol in turn as a substrate, placed in a CVD device, and the process chamber is vacuumed and purged with argon;

[0033] Step 2, pumping out the residual gas to a pressure within 10Pa;

[0034] Step 3, feed hydrogen and methane, the flow rate of hydrogen is 100 sccm, the flow rate of methane is 50 sccm, and the pressure of the cavity is controlled at 5000 Pa;

[0035] Step 4, heating the three-dimensional nickel foam substrate by induction heating, the heating temperature is 1000°C, and starting to deposit and grow three-dimensional porous graphene, and the deposition reaction time is 20 seconds;

[0036] Step five, repeat steps two to four,...

Embodiment 2

[0040] The present embodiment provides a kind of preparation method of three-dimensional porous graphene supercapacitor electrode material, the flow process of this method is as follows figure 1 As shown, the specific steps are as follows:

[0041] Step 1, the commercial three-dimensional copper foam is washed with deionized water and ethanol in turn as a substrate, placed in a CVD device, and the process chamber is vacuumed and purged with argon;

[0042] Step 2, pumping out the residual gas to a pressure within 10Pa;

[0043] Step 3, feed hydrogen and ethylene, the flow rate of hydrogen is 50 sccm, the flow rate of ethylene is 10 sccm, and the pressure of the chamber is controlled at 1000 Pa;

[0044] In step four, the three-dimensional copper foam substrate is heated by induction heating, and the heating temperature is 1050°C. Start to deposit and grow three-dimensional porous graphene, and the deposition reaction time is 5 minutes;

[0045] Step 5, repeat steps 2 to 4, ...

Embodiment 3

[0049] This embodiment is to investigate the influence of process pressure on the specific capacitance performance of the prepared three-dimensional porous graphene supercapacitor electrode material. Other conditions are the same as in Example 1, except that the cavity pressure is controlled at 1000Pa. The electrochemical performance test of the three-dimensional porous graphene supercapacitor electrode material of Example 3 in a 5M KOH electrolyte was carried out using an electrochemical workstation. The test results show that when the charge and discharge current density is 1A / g, the specific capacitance of the electrode is 116F / g.

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Abstract

The invention relates to the field of supercapacitor technology, in particular to a porous three-dimensional graphene supercapacitor electrode material comprising a foam metal part; and graphene is deposited on the surface of the foam metal part and the inner hole wall surface of the foam metal part. The invention provides a porous three-dimensional graphene supercapacitor electrode material and apreparation method thereof. The method is an improved one based on the existing CVD method for preparing a porous three-dimensional graphene material, so that a thick porous three-dimensional graphene material grows quickly. Moreover, the process is simple, the production is efficient, the cost is low, the environment protection effect is good, and the industrialization is realized conveniently.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a porous three-dimensional graphene supercapacitor electrode material and a preparation method thereof. Background technique [0002] Supercapacitors are also called electrochemical capacitors, which have excellent fast pulse charge and discharge performance and large capacity energy storage performance. A new type of energy storage device, which can be widely used as a high-efficiency clean power source, has received extensive attention from researchers and the energy industry in recent years. [0003] Electrode materials, as the key materials of supercapacitors, are required to have high specific surface area and good conductivity. Graphene is a two-dimensional honeycomb material composed of sp2 hybridization of carbon atoms, which has high electron mobility and high electrical conductivity. The entire surface of the graphene powder material can form an electric doubl...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 蒋健伟孙志鹏
Owner 河南格拉芬新材料科技有限公司
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