Biomass porous carbon material, preparation method thereof and supercapacitor

A technology of porous carbon materials and biomass, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of difficult doping of carbon materials, poor doping effect, and high doping cost. The effect of high purity, excellent electrochemical performance and high specific surface area

Pending Publication Date: 2022-07-15
SHENZHEN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the embodiments of the present invention is to provide a biomass porous carbon material, which aims to solve the problems of difficult doping of carbon materials, poor doping effect and high doping cost.

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
  • Biomass porous carbon material, preparation method thereof and supercapacitor
  • Biomass porous carbon material, preparation method thereof and supercapacitor
  • Biomass porous carbon material, preparation method thereof and supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] An embodiment of the present invention provides a method for preparing a biomass porous carbon material, comprising the following steps:

[0044] (1) Carbonizing treatment of goldenrod chrysanthemum to obtain crude carbon material.

[0045] In step (1), the golden silk chrysanthemum contains flavonoids, various amino acids, vitamins and trace elements, and carbonization is performed on it. In the obtained crude carbon material, nitrogen, oxygen and trace elements are distributed in situ. Before the carbonization treatment of the golden golden chrysanthemum, the golden golden chrysanthemum is cleaned, or the clean golden golden chrysanthemum is used for the carbonization treatment, so as to exclude the influence of other impurities on the properties of the prepared biomass porous carbon material. Deionized water, ethanol, etc. can be used to wash the golden silk chrysanthemum first, and then dried in a blast drying oven at a drying temperature of 50°C to 80°C. Influence...

Embodiment 1

[0055] A preparation method of biomass porous carbon material, the steps are as follows:

[0056] (1) The goldenseal chrysanthemum was washed with deionized water, then transferred to a blast drying oven, and dried at 60°C.

[0057] (2) Place the golden silk chrysanthemum obtained in step (1) in a tube furnace, feed nitrogen, and under nitrogen atmosphere, heat up to 800°C at a heating rate of 5°C / min, and keep the temperature at 800°C for 3.0 h, followed by natural cooling to room temperature to obtain a crude carbon material.

[0058] (3) fully grind 0.5g of the crude carbon material obtained in step (2) and 1.5g of potassium hydroxide, so that the crude carbon material and potassium hydroxide are mixed uniformly to obtain a mixture, and then the mixture is transferred to a tube furnace , introduce nitrogen, in a nitrogen atmosphere, heat up to 400 °C at a heating rate of 5 °C / min, keep at 400 °C for 0.5 h, and then heat up to 800 °C at a heating rate of 5 °C / min, and at 80...

Embodiment 2

[0061] A preparation method of biomass porous carbon material, the steps are as follows:

[0062] (1) The goldenseal chrysanthemum was washed with deionized water, then transferred to a blast drying oven, and dried at 80°C.

[0063] (2) placing the golden silk chrysanthemum obtained in step (1) in a tube furnace, feeding nitrogen, under nitrogen atmosphere, heating up to 850°C at a heating rate of 1°C / min, and keeping the temperature at 850°C for 4.0 h, followed by natural cooling to room temperature to obtain a crude carbon material.

[0064] (3) 0.5g of the crude carbon material obtained in step (2) is fully ground with 2.0g of potassium hydroxide, so that the crude carbon material and potassium hydroxide are mixed uniformly to obtain a mixture, and then the mixture is transferred to a tube furnace , introduce nitrogen, in a nitrogen atmosphere, heat up to 400°C at a heating rate of 2°C / min, keep at 400°C for 0.5 h, and then heat up to 800°C at a heating rate of 10°C / min, 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
Average pore sizeaaaaaaaaaa
Pore volumeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of supercapacitor materials, and particularly discloses a biomass porous carbon material, a preparation method thereof and a supercapacitor. The porous carbon material is prepared from gold imperial chrysanthemum and comprises carbon and doping elements, the specific surface area ranges from 1580 m < 2 > / g to 2100 m < 2 > / g, the average pore size ranges from 2.70 nm to 3.40 nm, and the pore volume ranges from 0.80 cm < 3 > / g to 1.10 cm < 3 > / g. The doping elements in the biomass porous carbon material are doped in the carbon material in situ, so that the biomass porous carbon material has the characteristic of uniform distribution of the doping elements, a stable porous structure is formed, and the biomass porous carbon material has a relatively large specific surface area, so that the biomass porous carbon material shows relatively excellent capacitive performance.

Description

technical field [0001] The invention relates to the technical field of supercapacitor materials, in particular to a biomass porous carbon material, a preparation method thereof, and a supercapacitor. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, have a series of advantages such as high power density, fast charging and discharging speed, and long cycle life, so they have broad application prospects in the field of energy storage. Carbon materials such as activated carbon, graphene, carbon nanotubes, and carbon aerogels are used as electrode materials for supercapacitors due to their good electrical conductivity and large specific surface area. By doping other elements, the capacitive properties of carbon materials can be effectively improved. However, the existing carbon materials have difficulties in doping with hetero elements, uneven distribution of doping elements, poor doping effect, and high cost. SUMMARY OF THE INVENTION ...

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): H01G11/26H01G11/86
CPCH01G11/26H01G11/86
Inventor 邹继兆徐景友吴亚琴张永刚张帆赵封林董皓宇郑敏海邓飞
Owner SHENZHEN 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