Activated carbon, preparation method thereof, and application of activated carbon in supercapacitor electrode

A technology of activated carbon and activator, applied in the field of activated carbon, can solve the problems of difficult activation and poor processing performance, and achieve the effects of good reaction and activation, high content of surface functional groups, and favorable regulation.

Inactive Publication Date: 2017-05-24
BTR NEW MATERIAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, plant husks, petroleum coke and polymer resins are hard and have poor processability; and they are dense in structure and difficult to activate

Method used

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  • Activated carbon, preparation method thereof, and application of activated carbon in supercapacitor electrode
  • Activated carbon, preparation method thereof, and application of activated carbon in supercapacitor electrode
  • Activated carbon, preparation method thereof, and application of activated carbon in supercapacitor electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Mix 100g of coconut shell powder raw material that has been mechanically crushed to 30 meshes with the activator sodium hydroxide in a solid phase at a mass ratio of 1:2, put it into a corundum crucible, and place it in a medium-temperature box-type resistance furnace under the protection of a nitrogen atmosphere. Raise the temperature at a rate of 2°C / min to 320°C for melt impregnation of the activator, heat preservation treatment for 2 hours; continue to heat up to 700°C at a speed of 2°C / min for activation, and heat preservation for 1 hour; The body was taken out, purified, ball milled, and sieved. Finally, under the protection of nitrogen atmosphere, in a medium-temperature box-type resistance furnace, the temperature was raised to 870°C at a rate of 2°C / min for high-temperature sintering, and heat treatment was performed for 1 hour. Finally, coconut shell-based activated carbon was obtained. Material.

[0074] figure 1 It is the SEM figure of the coconut shell-bas...

Embodiment 2

[0079] Mix 100 g of petroleum coke raw materials mechanically crushed to 30 mesh with activator sodium hydroxide in a solid phase at a mass ratio of 1:3, put it into a corundum crucible, and place it in a medium-temperature box-type resistance furnace under the protection of a nitrogen atmosphere at a temperature of 2 Heat up to 320°C at a speed of ℃ / min for activator melt impregnation, heat preservation treatment for 2 hours; continue to heat up to 800°C at a speed of 2°C / min for activation, heat preservation for 1 hour; after the box furnace cools down, take out the precursor of the activation material , after purification, ball milling, sieving, and finally under the protection of nitrogen atmosphere, in a medium-temperature box-type resistance furnace, the temperature was raised to 400°C at a rate of 2°C / min for high-temperature sintering, heat treatment for 1 hour, and finally petroleum coke-based activated carbon materials were obtained.

[0080] image 3 Be the XRD patt...

Embodiment 3

[0085] Mix 100g of phenolic resin raw material that has been mechanically crushed to 30 meshes with the activator sodium hydroxide in a solid phase at a mass ratio of 1:2, put it into a corundum crucible, and put it in a medium-temperature box-type resistance furnace under the protection of a nitrogen atmosphere. Heat up to 320°C at a speed of ℃ / min for activator melt impregnation, heat preservation treatment for 2 hours; continue to heat up to 750°C at a speed of 2°C / min for activation, heat preservation for 1 hour; after the box furnace cools down, take out the precursor of the activation material , after purification, ball milling, and sieving, and finally under the protection of nitrogen atmosphere, in a medium-temperature box-type resistance furnace, the temperature was raised to 600°C at a rate of 2°C / min for high-temperature sintering, and heat treatment was performed for 1 hour to finally obtain phenolic resin-based activated carbon.

[0086] The specific surface area o...

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Abstract

The invention relates to activated carbon, a preparation method thereof, and application of the activated carbon in a supercapacitor electrode. The method comprises the following steps of firstly drying, smashing and sieving an activated carbon raw material; then uniformly mixing the treated activated carbon raw material and an activating agent according to a certain mass ratio, under the protection of an inert atmosphere, heating in a sealed furnace body for carrying out activating agentmelt-impregnation, and then continuously warming for activating; purifying, ball-milling and sieving an obtained activated product, and finally carrying out high-heat treatment under the protection of an inert atmosphere to obtain the activated carbon. The specific surface area of the activated carbon provided by the invention is larger than 2000m<2> / g, and the specific surface area and the pore size distribution are controllable. The mass ratio capacitance of a supercapacitor prepared by adopting the activated carbon provided by the invention and a TEABF4 / PC organic system is larger than 130F / g. In addition, the activated carbon provided by the invention is simple in production process, low in preparation cost, short in period, good in comprehensive economic benefit, and easy to realize industrial production.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and relates to activated carbon, its preparation method and its application in supercapacitor electrodes. Background technique [0002] The core of the development of supercapacitor technology is the electrode material, and the development of high-performance and low-cost electrode materials is an important content of supercapacitor research. Among them, activated carbon materials are widely used due to their stable service life and large-scale industrial production basis to meet the urgent needs of high energy / high power density for supercapacitors such as electric vehicles. Activated carbon is a functional carbon material with developed pores, large specific surface area, and relatively low cost. It is the main electrode material for commercial supercapacitors. [0003] The preparation of activated carbon usually requires high-temperature pre-carbonization treatment, which inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324C01B32/33H01G11/24H01G11/34H01G11/44
CPCY02E60/13H01G11/24C01P2002/72C01P2004/03C01P2006/12C01P2006/40H01G11/34H01G11/44
Inventor 张松涛汪福明任建国岳敏
Owner BTR NEW MATERIAL GRP CO LTD
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