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

Method for preparing porous activated charcoal by using biological bases and product of method

A porous activated carbon and bio-based technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problem of poor rate performance and cycle stability of carbon materials, poor pore structure of carbon materials, increased electrolyte transmission resistance, etc. problem, to achieve the effect of simple and controllable preparation process, low cost, and reduced production cost

Inactive Publication Date: 2019-12-31
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing porous activated carbon using bio-based, to solve the problem that the pore structure of the carbon material prepared by the existing method is not rich and uncontrollable, and the specific surface area is not large; the technical problem to be solved by the present invention It is to provide a kind of porous activated carbon prepared by the method of preparing porous activated carbon by using bio-based, which solves the problem of poor rate performance and cycle stability of carbon materials; The application of existing carbon materials solves the problems of increased electrolyte transmission resistance, low specific capacitance and reduced cycle life.

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 preparing porous activated charcoal by using biological bases and product of method
  • Method for preparing porous activated charcoal by using biological bases and product of method
  • Method for preparing porous activated charcoal by using biological bases and product of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Utilize sodium alginate to prepare the method for porous activated carbon, the steps are as follows:

[0039] (1) Dissolve 2g sodium alginate in 200mL, 10%wt KHCO with continuous stirring for 1h 3 In the aqueous solution, stir slowly for 2h and add 1wt% BaCl 2 Solution 100mL, form a non-water-soluble gel, filter with suction, wash with water, wash with ethanol, and dry;

[0040] (2) Under nitrogen atmosphere at 2°C·min -1 The heating rate was increased to 700°C, and then kept for 1h.

[0041] (3) wash the sample of step (2) with dilute hydrochloric acid (8%), hot water and ethanol, and dry to prepare porous activated carbon, which is designated as PAC2.

[0042] figure 1 For the X-ray powder diffraction pattern of the honeycomb porous activated carbon PAC2 prepared in embodiment 1, from figure 1 It can be seen that the prepared carbon material shows (002) and (100) characteristic diffraction peaks of carbon, and the surface has a certain degree of graphitization.

...

Embodiment 2

[0045] Utilize sodium alginate to prepare the method for porous activated carbon, the steps are as follows:

[0046] (1) Dissolve 2g sodium alginate in 100mL, 20%wt KHCO with continuous stirring for 1h 3 After being in the aqueous solution, stir slowly for 2h and add 1wt% BaCl 2 Solution 100mL, form a non-water-soluble gel, filter with suction, wash with water, wash with ethanol, and dry;

[0047] (2) Under nitrogen atmosphere at 6°C·min -1 The heating rate was increased to 900°C, and then kept for 2h.

[0048] (3) Wash the sample in step (2) with dilute hydrochloric acid (8%), hot water, and ethanol, and dry to prepare porous activated carbon, which is designated as PAC6.

[0049] Electrochemical performance test of PAC6:

[0050] The electrochemical performance of the materials was tested using an electrochemical workstation produced by French Bio-Logic Company. Electrochemical tests were performed using a three-electrode system with Hg / HgO as the reference electrode an...

Embodiment 3

[0054] Utilize sodium alginate to prepare the method for porous activated carbon, the steps are as follows:

[0055] (1) Dissolve 2g sodium alginate in 200mL, 10%wt KHCO with continuous stirring for 1h 3 After being in the aqueous solution, stir slowly for 2h and add 0.5wt% BaCl 2 Solution 100mL, form a non-water-soluble gel, filter with suction, wash with water, wash with ethanol, and dry;

[0056] (2) Under nitrogen atmosphere at 10°C·min -1 The heating rate was increased to 800°C, and then kept for 1h.

[0057] (3) Wash the sample in step (2) with dilute hydrochloric acid (8%), hot water, and ethanol, and dry to prepare porous activated carbon, which is designated as PAC10.

[0058] Sodium alginate solution is stable between pH=5.0 and 11.0, so KHCO 3 The solution is weakly alkaline, so that sodium alginate remains stable during the reaction process, which is conducive to the formation of stable products; at the same time, there are a large number of hydrophilic groups ...

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

No PUM Login to View More

Abstract

The invention discloses a method for preparing porous activated charcoal by using biological bases and a product of the method and belongs to the technical field of pole materials of supercapacitors.The method comprises the steps of subjecting sodium alginate, a BaCl2 solution and a KHCO3 aqueous solution, which serve as raw materials, to a reaction so as to obtain water-insoluble gel, and then,carrying out high-temperature roasting charring, thereby preparing the PAC, wherein a temperature rises to 700 DEG C to 900 DEG C at a heating rate of 2 DEG C / min to 10 DEG C / min during high-temperature roasting. The synthesis method is simple, the process is environmentally friendly and is easy to achieve, and the prepared porous activated charcoal has good electrochemical properties. According to the method and the product thereof, the porous activated charcoal is prepared by adopting the sodium alginate, the raw materials are readily available and pollution-free and are low in cost, the preparation process is simple and controllable, and the method is environmentally friendly and is sustainable in production.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for supercapacitors, and in particular relates to a method for preparing porous activated carbon by using bio-based materials and a product thereof. Background technique [0002] Sodium alginate is a by-product of extracting iodine and mannitol from brown algae kelp or sargassum, and its molecules are composed of β-D-mannuronic acid (β-D-mannuronic, M) and α-L-gulo Uronic acid (α-L-guluronic, G) is a natural polysaccharide linked by (1→4) bonds. As a marine resource with abundant reserves, sodium alginate has the stability required for pharmaceutical preparations , solubility, viscosity and safety. Sodium alginate has been widely used in food industry and medicine. [0003] Based on the purpose of saving energy and protecting the environment, the new energy electric vehicle industry has developed rapidly in recent years. Among them, the electrochemical energy storage device is the c...

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): C01B32/318C01B32/348H01G11/24H01G11/34H01G11/44
CPCC01B32/318C01B32/348H01G11/24H01G11/34H01G11/44Y02E60/13
Inventor 孙康吴迪超李继辉候兴隆
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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