Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing supercapacitors based on three-dimensional porous graphene composites

A technology of supercapacitors and composite materials, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, graphene, etc., can solve problems such as high cost and harsh conditions

Inactive Publication Date: 2017-08-04
FUJIAN NORMAL UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Graphitization is the orderly conversion of thermodynamically unstable carbon atoms from a disordered layer structure to a graphite crystal structure by thermal activation. During the graphitization process, high-temperature heat treatment (above 2000°C) is used to provide energy for atomic rearrangement and structural transformation , so the conditions are harsh and the cost is high

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
  • A method for preparing supercapacitors based on three-dimensional porous graphene composites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of three-dimensional porous graphene composites

[0033] (1) Prepare 0.3MZn (Cl) respectively 2 1L of aqueous solution, 0.1M Co (Cl ) 3 1L of aqueous solution is solution A and B;

[0034] (2) Take 0.03 mol of sodium succinate and pre-disperse it in 100 ml of distilled water, then add an aqueous solution containing 0.25 mol of NaOH under strong stirring to fully react, and then add an appropriate amount of distilled water to prepare a mixed slurry C;

[0035] (3) Under the condition of continuously stirring the mixed slurry C, add the aqueous solution A and the aqueous solution B dropwise to the mixed slurry C at the same time;

[0036] (4) After the dropwise addition, adjust the pH value to 9.0 with a NaOH solution with a mass ratio of 30% to obtain a sample; place the sample at 80°C for 12 hours;

[0037] (5) Wash the aged sample with deionized water until the final filtrate pH = 7, filter, and vacuum-dry the obtained filter cake at a temperature range ...

Embodiment 2

[0046] Preparation of three-dimensional porous graphene composites

[0047] (1) Prepare 0.8M Cu (NO 3 ) 2 1L of aqueous solution, 0.48M Fe (NO 3 ) 3 1L of aqueous solution is solution A and B;

[0048] (2) Take 1.7mol of sodium dodecylbenzenesulfonate and fully disperse it in 100ml of distilled water, which is solution C;

[0049] (3) Under the condition of constantly stirring the solution C, add the aqueous solution A and the aqueous solution B dropwise to the solution C at the same time;

[0050] (4) After the dropwise addition, adjust the pH value to 8.0 with a NaOH solution with a mass ratio of 30% to obtain a sample; place the sample at 70°C for 16 hours;

[0051] (5) Wash the aged sample with deionized water until the final filtrate pH = 7, filter, and vacuum-dry the obtained filter cake at a temperature range of 60°C for 8 hours to obtain dodecylbenzenesulfonate intercalated hydrotalcite ;

[0052] (6) Put the dodecylbenzenesulfonate intercalated hydrotalcite in ...

Embodiment 3

[0059] Preparation of three-dimensional porous graphene composites

[0060] (1) Prepare 0.3M Ni (Cl) respectively 2 Aqueous solution 1L, 0.12M V (Cl ) 3 1L of aqueous solution is solution A and B;

[0061] (2) Take 0.01mol of extra-grade pure rosin and fully disperse it in 100ml of absolute ethanol, this is solution C;

[0062] (3) Under the condition of constantly stirring the solution C, add the aqueous solution A and the aqueous solution B dropwise to the solution C at the same time;

[0063] (4) After the dropwise addition, the sample was obtained by adjusting the pH value to 11.0 with a NaOH solution with a mass ratio of 30%; the sample was aged at 90°C for 10 hours;

[0064] (5) Wash the aged sample with deionized water until the final filtrate pH = 8, filter, and vacuum-dry the obtained filter cake at a temperature range of 100°C for 3 hours to obtain rosin acid radical intercalated hydrotalcite;

[0065] (6) Put the abietic acid root-intercalated hydrotalcite in a ...

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a supercapacitor based on a three-dimensional porous graphene composite material, comprising: combining the three-dimensional porous graphene composite material with acetylene black and a polytetrafluoroethylene emulsion with a mass fraction of 15% in a weight ratio of (76-84 ): (12-18): (5-8) ratio grinding and mixing into electrode slurry, and evenly dispersed in a small amount of absolute ethanol to form a paste liquid and coated on the surface of nickel foam to make a thin sheet to obtain an electrode sheet; A polypropylene porous film is used as a diaphragm and soaked in an aqueous electrolyte solution, the soaked diaphragm is placed between two electrode sheets, and a supercapacitor with two electrodes is packaged. The present invention is based on the three-dimensional porous graphene composite material, and when the packaged current density is 0.1A / g, the specific capacity can reach between 236-160F / g.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a method for preparing a supercapacitor based on a three-dimensional porous graphene composite material. [0002] technical background [0003] Supercapacitor (supercapacitor) is a new type of energy storage device between secondary batteries and traditional capacitors. It has the advantages of high power density, fast charge and discharge, high safety, long cycle life, and environmental protection. characteristics, and has the power characteristics of capacitors, is considered to be a revolution in the field of energy storage, and has shown great application value in many fields such as hybrid vehicles, communications, national defense, and consumer electronics. The interior of a supercapacitor is mainly composed of electrodes, electrolytes and diaphragms, where the electrodes determine the main performance indicators of the supercapacitor, and the electrodes ar...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/36C01B32/184
CPCY02E60/13
Inventor 凌启淡陈鸿章文贡肖厚文
Owner FUJIAN NORMAL UNIV