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
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 utili

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] This embodiment provides a method for preparing a three-dimensional porous graphene supercapacitor electrode material. The process of the method is as follows figure 1 As shown, the specific steps are as follows:

[0032] Step 1: Take commercial three-dimensional nickel foam as a substrate after being cleaned with deionized water and ethanol in sequence, placed in a CVD device, and vacuum the process chamber and purged with argon;

[0033] Step two, extract the residual gas to a pressure within 10 Pa;

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

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

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

Example Embodiment

[0039] Example 2

[0040] This embodiment provides a method for preparing a three-dimensional porous graphene supercapacitor electrode material. The process of the method is as follows figure 1 As shown, the specific steps are as follows:

[0041] Step 1: Take commercial three-dimensional copper foam as a substrate after being washed with deionized water and ethanol in sequence, placed in a CVD device, and vacuum the process chamber and purged with argon;

[0042] Step two, extract the residual gas to a pressure within 10 Pa;

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

[0044] Step four, heating the three-dimensional foamed copper substrate by induction heating, and the heating temperature is 1050°C. Start the deposition and growth of three-dimensional porous graphene, and the deposition reaction time is 5 minutes;

[0045] Step five, repeat steps two to f...

Example Embodiment

[0048] Example 3

[0049] This example 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 1000 Pa. An electrochemical workstation was used to test the electrochemical performance of the three-dimensional porous graphene supercapacitor electrode material of Example 3 in 5M KOH electrolyte. The test results show that when the charge and discharge current density is 1A / g, the specific capacitance of the electrode is 116F / g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Specific capacitanceaaaaaaaaaa
Specific capacitanceaaaaaaaaaa
Specific capacitanceaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap