Graphene electrode sheet and manufacturing method, and method for manufacturing supercapacitor by using graphene electrode sheet

A technology for graphene electrodes and supercapacitors, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of large liquid absorption, low solid content of slurry, and low density of graphene materials, and achieve improved Excellent content, specific surface area, low dosage effect

Inactive Publication Date: 2018-08-31
NINGBO CRRC NEW ENERGY TECH CO LTD
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene materials have low density, large liquid absorption, and low solid content of slurry, which pose challenge

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
  • Graphene electrode sheet and manufacturing method, and method for manufacturing supercapacitor by using graphene electrode sheet
  • Graphene electrode sheet and manufacturing method, and method for manufacturing supercapacitor by using graphene electrode sheet
  • Graphene electrode sheet and manufacturing method, and method for manufacturing supercapacitor by using graphene electrode sheet

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example 1

[0046] The graphene and the conductive agent are subjected to super-strong shearing at a mass percentage of 88:6 to obtain a premix; the premix is ​​put into a kneader, an appropriate amount of water emulsion of the binder is added, and stirred for 30 minutes to obtain a dough-shaped electrode slurry pre-finished product. Among them, the specific surface area of ​​graphene is 1000-1500m 2 / g, the tap density is 0.2-0.5g / cm 3 , the pore size is 2-10nm, the particle size is 7-10μm, the carbon content is greater than 99.8%, the oxygen-containing functional group content is less than 0.35meq / g, the water content is less than 0.40%, and the total metal content is less than 100ppm. figure 1 shown; the current collector is a foamed aluminum current collector with a three-dimensional porous structure, and its microscopic morphology is as follows figure 2 As shown, the thickness of the foamed aluminum current collector is 200-1500 μm, the average pore size is 50-2...

Example Embodiment

[0050] Example 2

[0051] The graphene and the conductive agent are subjected to super shearing at a mass percentage of 90:4 to obtain a premix; the premix is ​​put into a kneader, an appropriate amount of the aqueous emulsion of the binder is added, and stirred for 35 minutes to obtain a dough-shaped electrode slurry pre-finished product. Among them, the specific surface area of ​​graphene is 1000-1500m 2 / g, the tap density is 0.2-0.5g / cm 3 , the pore size is 2-10nm, the particle size is 7-10μm, the carbon content is more than 99.8%, the oxygen-containing functional group content is less than 0.35meq / g, the water content is less than 0.40%, and the total metal content is less than 100ppm; the current collector is a foam with a three-dimensional porous structure Aluminum current collector, the thickness of the foamed aluminum current collector is 200-1500μm, the average pore size is 50-200μm, and the porosity is 85-95%; the conductive agent is carbon black, carbon nanotubes ...

Example Embodiment

[0055] Example 3

[0056] The graphene and the conductive agent are subjected to super shearing at a mass percentage (80:8) to obtain a premix; the premix is ​​put into a kneader, an aqueous emulsion of an appropriate amount of binder is added, and stirred for 25min to obtain a dough-shaped electrode slurry pre-finished product . Among them, the specific surface area of ​​graphene is 1000-1500m 2 / g, the tap density is 0.2-0.5g / cm 3 , the pore size is 2-10nm, the particle size is 7-10μm, the carbon content is more than 99.8%, the oxygen-containing functional group content is less than 0.35meq / g, the water content is less than 0.40%, and the total metal content is less than 100ppm; the current collector is a foam with a three-dimensional porous structure Aluminum current collector, the thickness of foamed aluminum current collector is 200-1500μm, the average pore size is 50-200μm, and the porosity is 85-95%; the conductive agent is carbon black, carbon nanotubes and graphene i...

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 surface areaaaaaaaaaaa
Tap densityaaaaaaaaaa
Apertureaaaaaaaaaa
Login to view more

Abstract

The invention relates to a graphene electrode sheet and a manufacturing method, and a method for manufacturing a high specific-energy and ultra-high-power graphene supercapacitor by using the grapheneelectrode sheet and belongs to the new energy storage device technology field. The graphene electrode sheet comprises a current collector and a graphene electrode slurry. The graphene electrode slurry comprises, by weight, 75-93% of graphene, 2-10% of conductive agent, and 5-15% binder. The current collector is a foamed aluminum current collector. The specific surface area of graphene is 1000 to1500 m<2>/g, a tap density is 0.2 to 0.5 g/cm<3>, an aperture is 2 to 10 nm, a particle size is 7 to 10 micron, and a carbon content is greater than 99.8%. The content of an oxygen-containing functional group is less than 0.35 meq/g, a water content is less than 0.40%, and a total metal content is less than 100 ppm. The energy density of the graphene supercapacitor manufactured by the electrode sheet is 12 Wh/kg and a power density is 30.14 kW/kg.

Description

technical field [0001] The invention relates to a graphene electrode sheet, a preparation method thereof, and a method for preparing a graphene supercapacitor with high specific energy and ultra-high power, and belongs to the technical field of new energy storage devices. Background technique [0002] Supercapacitors have extremely high safety, million-cycle life, super-high power characteristics, good low-temperature performance, and environmental friendliness, and are a powerful choice to replace batteries. The United States "Discovery" listed it as one of the world's seven major scientific and technological discoveries in 2006. It is a national strategic emerging industry, a core key energy storage device for the core components of new energy vehicles and the field of high efficiency and energy saving. However, the current commercial supercapacitors have small capacity and low energy density. The energy density of traditional activated carbon-based electric double layer ...

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): H01G11/36H01G11/86
CPCH01G11/36H01G11/86Y02E60/13
Inventor 阮殿波郑超潘国林陈雪丹李林艳周洲
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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