Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of shell-like mesoporous carbon material for super capacitors

A supercapacitor, shell-like technology, applied in the field of carbon material preparation, can solve the problems of low specific surface area of ​​hard carbon materials, low specific surface area of ​​porous carbon, large average pore size, etc., and achieve good rate performance, cycle stability, and rate performance. , the effect of high specific capacity

Inactive Publication Date: 2015-05-06
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above literature that using mesophase pitch as the carbon source and silica as the template agent requires hydrofluoric acid to remove the template. The operation is more complicated and the pollution is serious; The specific surface area of ​​the material is low, and the average pore size is large; coal tar pitch is used as the carbon source, and magnesium oxide is used as the template. Although the preparation of porous carbon materials by microwave heating is time-saving, the operation is more complicated, and the specific surface area of ​​the obtained porous carbon is low.

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
  • Preparation method of shell-like mesoporous carbon material for super capacitors
  • Preparation method of shell-like mesoporous carbon material for super capacitors
  • Preparation method of shell-like mesoporous carbon material for super capacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: shell-like mesoporous carbon SMPC 2-19-6-850 The specific preparation process is as follows:

[0025] (1) Pretreatment of reactants: Weigh 2g of petroleum pitch and put it into a mortar, add 19g of nano-zinc oxide (particle size between 100-150nm), and then add 6g of potassium hydroxide, and the mixture of the three obtained is ground evenly get reactants.

[0026] (2) Preparation of shell-shaped mesoporous carbon material: put the reactant obtained in step (1) into a porcelain boat, then place the porcelain boat in a tube furnace, and feed argon gas into the tube furnace Exhaust the air, keep the argon gas rate at 60mL / min, heat the tube furnace to 200°C at a heating rate of 5°C / min, keep the temperature for 30min, and continue to heat the tube furnace to 850 at a heating rate of 5°C / min After ℃, keep the temperature for 60min, and cool down to room temperature naturally. Grind the obtained product and put it into a beaker, add a certain amount of 2mol / L ...

Embodiment 2

[0027] Example 2: shell-like mesoporous carbon SMPC 3-18-6-800 The specific preparation process is as follows:

[0028] (1) Pretreatment of reactant: implement according to the same method as step (1) in Example 1, the difference is that the petroleum pitch taken by weighing is 3g, and nano-zinc oxide is 18g.

[0029] (2) Carry out the same method as step (2) in Example 1, except that the tube furnace is heated to 800°C. The resulting shell-like mesoporous carbon is labeled as SMPC 3-18-6-800 . SMPC3-18-6-800 As a supercapacitor electrode material, its specific volume reaches 237F / g at a current density of 0.05A / g in a 6mol / L KOH electrolyte.

Embodiment 3

[0030] Example 3: shell-like mesoporous carbon SMPC 3-18-6-850 The specific preparation process is as follows:

[0031] (1) Pretreatment of reactant: implement according to the same method as step (1) in Example 1, the difference is that the petroleum pitch taken by weighing is 3g, and nano-zinc oxide is 18g.

[0032] (2) Carry out in the same manner as step (2) in Example 1. The resulting shell-like mesoporous carbon material is marked as SMPC 3-18-6-850 . SMPC 3-18-6-850 As a supercapacitor electrode material, its specific volume reaches 263F / g at a current density of 0.05A / g in a 6mol / L KOH electrolyte.

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
pore sizeaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of shell-like mesoporous carbon material for super capacitors, belonging to the technical field of carbon material preparation. The method comprises the following steps of: grinding and uniformly mixing petroleum asphalt serving as carbon source, nano zinc oxide serving as a template and potassium hydroxide serving as an activator together and putting the mixture into a porcelain boat, placing the porcelain boat in a tube furnace and heating in an argon atmosphere, thus obtaining the shell-like mesoporous carbon material. The specific area of the shell-like mesoporous carbon material is in a range of 1766-2646m<2> / g, and mean pore size of the shell-like mesoporous carbon material is in a range of 2.05-2.25nm; when used as super capacitor electrode material, in 6mol / L KOH electrolyte, the shell-like mesoporous carbon material has the specific capacity high up to 296F / g under the condition of 0.05A / g current density. In the preparation method provided by the invention, cheap petroleum asphalt is used as carbon source, so that high value-added utilization of petroleum asphalt is realized. The obtained shell-like mesoporous carbon material is used as a super capacitor electrode material, has the advantages of good rate capability, high specific capacity, good cycling stability, and so on.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a method for preparing a shell-shaped mesoporous carbon material for supercapacitors. Background technique [0002] Supercapacitor is a new type of energy storage element, which has the advantages of fast charge and discharge rate, good rate performance, and long service life. It has broad application prospects in industrial power supplies, electronic communications, and military affairs. The electrochemical performance of supercapacitors largely depends on the electrode materials, so it is of great significance to develop high-performance electrode materials. Mesoporous carbon has become the most widely used electrode material for supercapacitors due to its high specific surface area and good electrochemical stability. The raw materials for preparing mesoporous carbon mainly include coal, petroleum and biomass. Petroleum asphalt is the residue a...

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 Applications(China)
IPC IPC(8): C01B31/12
Inventor 何孝军刘自得王晓婷方道来赵志刚凌强余谟鑫张永亮
Owner ANHUI UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com