Method for preparing activated carbon with high specific surface area by using conyza canadensis

A high specific surface area, activated carbon technology, applied in the field of high specific surface area activated carbon, can solve the problems of uneven performance of carbon materials, limited geographical or output, and restrictions on industrialization development, and achieve low price, easy industrial production, and reduce production costs.

Inactive Publication Date: 2015-03-11
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these raw material resources are limited in area or output, difficult to collect, and the structure and chemical composition of the same batch of raw materials are different, it is difficult to form a standardized industrial preparation route, and the properties of the obtained carbon materials are not uniform, which limits its industrial development.

Method used

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  • Method for preparing activated carbon with high specific surface area by using conyza canadensis
  • Method for preparing activated carbon with high specific surface area by using conyza canadensis
  • Method for preparing activated carbon with high specific surface area by using conyza canadensis

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Effect test

Embodiment 1

[0035] Figure 1b It is the field emission scanning diagram of the activated carbon material at 700°C in the present invention. In the figure, 2g of chrysanthemum is carbonized in a high-temperature carbonization furnace using an inert gas protection method. The treatment temperature is 1050°C and the treatment time is 15 hours to obtain charcoal material, grind it into powder, and pass through a 200-mesh sieve; take 1g of the powder, mix it with KOH at a mass ratio of 1:5, dissolve it in deionized water and absolute ethanol, stir for 24 h, and put it in a vacuum In a drying oven, dry at 120°C for 10 h, and activate the pre-activated carbon material sample at 700°C. The whole activation and cooling process is carried out under the protection of high-purity inert gas. The obtained activated carbon material was put into 2 M HCl solution and stirred for 10 h. After fully reacting, it was washed with hot water at 90-100°C and filtered until it was washed to neutrality (pH≈6-7). P...

Embodiment 2

[0037] Figure 1c It is the field emission scanning diagram of the activated carbon material at 800°C in the present invention. In the figure, 2g of basilica is carbonized in a high-temperature carbonization furnace using an inert gas protection method. The treatment temperature is 1050°C and the treatment time is 15 hours to obtain charcoal material, grind it into powder, and pass through a 200-mesh sieve; take 1g of the powder, mix it with KOH at a mass ratio of 1:5, dissolve it in deionized water and absolute ethanol, stir for 24 h, and put it in a vacuum In a drying oven, dry at 120°C for 10 h, and activate the pre-activated carbon material sample at 800°C. The whole activation and cooling process is carried out under the protection of high-purity inert gas. The obtained activated carbon material was put into 2 M HCl solution and stirred for 10 h. After fully reacting, it was washed with hot water at 90-100°C and filtered until it was washed to neutrality (pH≈6-7). Put th...

Embodiment 3

[0039] Figure 1d It is the field emission scanning diagram of the activated carbon material at 900°C in the present invention. In the figure, 2g of chrysalis is carbonized in a high-temperature carbonization furnace using an inert gas protection method. The treatment temperature is 1050°C and the treatment time is 15 hours to obtain charcoal material, grind it into powder, and pass through a 200-mesh sieve; take 1g of the powder, mix it with KOH at a mass ratio of 1:5, dissolve it in deionized water and absolute ethanol, stir for 24 h, and put it in a vacuum In a drying oven, dry at 120°C for 10 h, and activate the pre-activated carbon material sample at 900°C. The whole activation and cooling process is carried out under the protection of high-purity inert gas. The obtained activated carbon material was put into 2 M HCl solution and stirred for 10 h. After fully reacting, it was washed with hot water at 90-100°C and filtered until it was washed to neutrality (pH≈6-7). Put t...

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Abstract

The invention provides a method for preparing activated carbon with high specific surface area by using conyza canadensis. Used raw materials are rich in sources and low in price. The pore diameter and the specific surface area of the activated carbon can be effectively adjusted through controlling the amount of an activating agent and the activation temperature, and the super capacitor energy storage performance is improved. The prepared activated carbon with high specific surface area can be used in super capacitors, lithium ion batteries, lithium sulfur batteries, hydrogen storage, catalysis and other fields.

Description

technical field [0001] The invention belongs to the field of preparation of carbon electrode materials for supercapacitors, and in particular relates to a method for preparing activated carbon with high specific surface area for supercapacitors by using chrysanthemum as a raw material. Background technique [0002] The development of high-performance energy storage devices is a great challenge to cope with today's environmental degradation and the depletion of fossil energy. Supercapacitors, also known as extreme capacitors or electrochemical capacitors, have energy density hundreds of times that of traditional capacitors, and power densities two orders of magnitude higher than batteries. The disadvantage of low density. In addition, supercapacitors have a fast charge and discharge rate (a few milliseconds), a wide temperature range, and a long cycle life (greater than 10 6 Times), non-polluting and other excellent characteristics, it has unique application advantages unde...

Claims

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Application Information

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IPC IPC(8): C01B31/12
Inventor 袁磊王朝阳付志兵唐永建张厚琼赵海波杨曦钟铭龙
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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