Method for directly preparing co-doping three-dimensional graphene electrode material through biomass carbon sources

A technology of graphene electrode and biomass carbon source, which is applied in the field of electrode materials, can solve the problems that graphene preparation is difficult to control, cannot be mass-produced, and limits the application of graphene, so as to achieve good cycle stability, stable product quality, and improved The effect of practical performance

Active Publication Date: 2016-02-10
YANSHAN UNIV
View PDF3 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the prior art makes the preparation process relatively complicated, the production cost is expensive, and the equipment requirement...

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
  • Method for directly preparing co-doping three-dimensional graphene electrode material through biomass carbon sources
  • Method for directly preparing co-doping three-dimensional graphene electrode material through biomass carbon sources
  • Method for directly preparing co-doping three-dimensional graphene electrode material through biomass carbon sources

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Clean the Artemia egg shells, dry them at 120°C, ball mill them for 3 hours, wash them with hydrochloric acid in turn, wash them with deionized water until pH = 7, and finally dry them; take 0.25g of the above-mentioned treated Artemia egg shells and add Add 100ml of nickel acetate solution with a concentration of 0.01mol / L, stir for 0.5h, add 10ml of potassium hydroxide solution with a concentration of 0.89mol / L, then add 0.083g of red phosphorus, then heat the above solution to 80°C and stir at a high speed Evaporate to a paste. Put the obtained pasty substance into an oven for drying at 80°C, then grind it into fine powder and put it into a tube furnace, control the heating rate at 2°C / min, calcinate at 700°C and keep it warm for 2 hours; pickle the obtained product, wash it with water, Adjust pH=7, filter and dry to obtain doped hierarchical pore structure graphene with high degree of graphitization.

[0028] Grind the obtained graphene into powder, respectively ta...

Embodiment 2

[0031] Clean the Artemia egg shells, dry them at 120°C, ball mill for 5 hours, wash them with hydrochloric acid in turn, wash them with deionized water until pH = 7, and finally dry them; take 2.76g of the above-mentioned treated Artemia egg shells and add Add 100ml of nickel acetate solution with a concentration of 0.05mol / L, stir for 1.5h, add 40ml of potassium hydroxide solution with a concentration of 3mol / L, and then add 1.92g of red phosphorus, then heat the above solution to 120°C, and evaporate it to mushy. Put the obtained pasty substance into an oven for drying at 80°C, then grind it into a fine powder and put it into a tube furnace, control the heating rate at 2°C / min, calcinate at 800°C and keep it warm for 3 hours; pickle the obtained product, wash it with water, Adjust pH=7, filter and dry to obtain doped hierarchical pore structure graphene with higher degree of graphitization.

[0032] Grind the obtained graphene into powder, respectively take 85 mg of graphen...

Embodiment 3

[0035] Clean the Artemia egg shells, dry them at 120°C, ball mill them for 6 hours, wash them with hydrochloric acid, wash them with deionized water until pH=7, and finally dry them; take 5.32g of the above-mentioned treated Artemia egg shells Add it to 80ml of nickel acetate solution with a concentration of 0.05mol / L, stir for 2 hours, add 60ml of potassium hydroxide solution with a concentration of 4mol / L, and then add 11.26g of red phosphorus, then heat the above solution to 150°C, and quickly stir and evaporate until mushy. Put the obtained pasty substance into an oven for drying at 80°C, then grind it into a fine powder and put it into a tube furnace, control the heating rate at 2°C / min, calcinate at 800°C and keep it warm for 4 hours, pickle the product, wash it with water, and adjust the pH = 7, filtered and dried to obtain graphene with a higher degree of graphitization doped hierarchical pore structure.

[0036] Grind the obtained graphene into powder, respectively t...

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
Concentrationaaaaaaaaaa
Specific capacitanceaaaaaaaaaa
Specific capacitanceaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for directly preparing a co-doping three-dimensional graphene electrode material through biomass carbon sources. The method mainly includes the steps that biomass such as eggshells of artemia cysts, bean pulp and shrimp shells are used as the carbon sources, red phosphorus or boric acid is added to serve as a stripping agent, metal nickel salt is added to serve as a catalyst, and oxygen-nitrogen-phosphor multi-atom co-doping three-dimensional porous graphene is synthesized in a roasted mode at the temperature of 700 DEG C to 900 DEG C under argon atmosphere; the obtained graphene is ground into powder, the graphene, acetylene black and PTFE are ultrasonically dispersed into absolute ethyl alcohol in the mass ratio of 85:10:5, the mixture is dried at the temperature of 80 DEG C to be pasty, 0.5 mg to 5 mg of the mixture is taken and evenly smeared on 1*1-cm foam nickel, vacuum drying is carried out at the temperature of 120 DEG C for 12 h, plate pressing is carried out at the pressure of 12 MPa, and an electrode plate is obtained. According to the method, the source of the required raw materials is wide, the price is low, devices are simple, repeatability is good, and low-cost large-scale industrial production can be achieved easily; the prepared graphene electrode material has the advantages of being good in electrochemical activity, large in specific area, not prone to repeated accumulation and the like; the broad application prospects are achieved in the aspects such as electrode materials and catalyst carriers of supercapacitors and lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, in particular to a preparation method of graphene electrode materials. technical background [0002] Graphene is a carbon atom with sp 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. The special structure of graphene makes it exhibit excellent properties, such as high strength, high electron mobility, high thermal conductivity, high specific surface area, high chemical and electrochemical stability, and can be applied to composite materials, semiconductor materials, storage Energy materials, catalysts and catalyst supports and other fields. It is an effective way to change the electronic structure and chemical properties of graphene through effective doping. The incorporation of heteroatoms into the lattice of graphene can not only effectively introduce a band gap, but also increase...

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): C01B31/04
Inventor 赵玉峰黄士飞张智
Owner YANSHAN UNIV
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