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A kind of porous carbon prepared from biomass unburned carbon and its application in supercapacitor

A porous carbon, unburned technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, carbon compounds, etc., can solve problems such as expensive, difficult to concentrate, storage, limited shell resources, etc., to achieve process simplification , low volatile content, optimized pore-forming effect

Active Publication Date: 2021-08-06
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is generally believed that fruit shell is the best raw material for preparing activated carbon, but the resource of fruit shell in my country is very limited, and it is not easy to concentrate and store, and the price is expensive

Method used

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  • A kind of porous carbon prepared from biomass unburned carbon and its application in supercapacitor
  • A kind of porous carbon prepared from biomass unburned carbon and its application in supercapacitor
  • A kind of porous carbon prepared from biomass unburned carbon and its application in supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment relates to a method of preparing unburned carbon extraction and porous carbon, comprising the steps of:

[0063] Step 1, the unburned carbon was placed in a 105 ° C oven drying 24 h.

[0064] Step 2, the dried unburned carbon is sieved with an 80 mesh screen, and the residue is baked on the sieve after the sieration.

[0065] Step three, referring 4 g of the second step, and the KOH solid 14g was weighed according to the carbon base ratio 1: 3.5 and configured to saturate the saturated KOH solution and the product obtained by mixing the product obtained by mixing the product after mixing. The high temperature was impregnated at a high temperature at 80 ° C to impregnate the material.

[0066] Step four, put the immersion material into the muffle in the nitrogen atmosphere (flow rate of 1.5 L / min) to activate from room temperature to warm to 350 ° C from room temperature to 350 ° C for low temperature activation, heat insulation 45min, then the same The tem...

Embodiment 2

[0070] This embodiment relates to a method of preparing unburned carbon extraction and porous carbon, comprising the steps of:

[0071] Step 1, the unburned carbon is placed in a 100 ° C oven drying 22 h.

[0072] Step 2, the dried unburned carbon is sieved with a 70 mesh screen, and the residue is baked on the sieve after the sieration.

[0073] Step three, weighted 4 g of the second step, and the KOH solid 14g was measured according to the carbon base ratio 1: 3.5 and configured to be saturated, and the saturated NaOH solution was mixed with step two, and then put it into the blast drying tank. The high temperature was impregnated at a high temperature at 75 ° C to impregnate the material.

[0074] Step four, put the immersion material into the muffle furnace in a nitrogen atmosphere (flow rate of 1.5 L / min) to activate from room temperature to warm to 300 ° C from room temperature to 300 ° C for low temperature activation, heat insulation 50min, and then the same The temperat...

Embodiment 3

[0077] This embodiment relates to a method of preparing unburned carbon extraction and porous carbon, comprising the steps of:

[0078] Step 1, the unburned carbon is placed in a 100 ° C oven drying 22 h.

[0079] Step 2, the dried unburned carbon is sieved with a 70 mesh screen, and the residue is baked on the sieve after the sieration.

[0080] Step three, weighted 4 g of the second step, and the NaOH solid 14g was weighed according to the carbon base ratio 1: 3.5, and the saturated NaOH solution was mixed with step two, and then put it into the blast drying tank. The high temperature was impregnated at a high temperature at 75 ° C to impregnate the material.

[0081] Step four, put the immersion material into the muffle furnace in a nitrogen atmosphere (flow rate of 1.5 L / min) to activate from room temperature to warm to 300 ° C from room temperature to 300 ° C for low temperature activation, heat insulation 50min, and then the same The temperature rise rate is heated to 850 ...

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Abstract

The disclosure belongs to the field of porous carbon materials, and in particular relates to a porous carbon prepared from biomass unburned carbon and its application in supercapacitors. The disclosure provides a porous carbon material prepared from biomass unburned carbon as a raw material. The preparation method is as follows: pretreat the unburned carbon raw material, and then add the pretreated material to a saturated solution of an activator and soak it for a period of high temperature. The impregnated material is obtained in a short period of time, and then the impregnated material is heated to 300-400°C for low-temperature activation. After a period of low-temperature activation, continue to be heated to 700-900°C for high-temperature activation. After a period of high-temperature activation, the activated material is obtained, and finally the activated material is activated. The treatment is porous carbon. The porous carbon material provided by the disclosure has a larger specific surface area, a higher energy density of a supercapacitor, and obtains excellent electrochemical characteristics.

Description

Technical field [0001] The present disclosure belongs to the field of porous carbon material, and more particularly to a porous carbon material prepared by a biomass unburned carbon as a raw material, and the application of the material in the preparation of supercapacitance. Background technique [0002] The information disclosed in the background is only intended to increase the understanding of the overall background of the present disclosure, and is not necessarily considered to admit or imply that the information has become a prior art known to those of ordinary skill in the art. [0003] Supercapacitor is a new energy storage device between the traditional capacitor and the rechargeable battery, which has the advantages of high energy density, high power density, long cycle life, fast charge and discharge speed, high temperature window and excellent in temperature window. Information technology, electric vehicles, aerospace and national defense technology have an extremely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/342C01B32/348H01G11/24H01G11/34H01G11/44H01G11/86
CPCC01B32/324C01B32/342C01B32/348H01G11/24H01G11/34H01G11/44H01G11/86Y02E60/13
Inventor 韩奎华龙慎伟朱应泉任科吴焕廷陈宪科张运虎李冠兵王永征牛胜利齐建荟
Owner SHANDONG UNIV
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