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High-specific-surface-area mesoporous activated carbon and preparation method thereof and application of high-specific-surface-area mesoporous activated carbon in supercapacitor

A technology of mesoporous activated carbon and high specific surface area, used in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, chemical instruments and methods, etc. The effect of low, excellent specific capacitance and cycle performance, and low energy consumption

Active Publication Date: 2017-10-17
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of complex preparation process, high energy consumption and high cost of activated carbon in the prior art, the second object of the present invention is to provide a method for preparing activated carbon with fast, efficient, low cost and high yield using durian shell as raw material

Method used

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  • High-specific-surface-area mesoporous activated carbon and preparation method thereof and application of high-specific-surface-area mesoporous activated carbon in supercapacitor
  • High-specific-surface-area mesoporous activated carbon and preparation method thereof and application of high-specific-surface-area mesoporous activated carbon in supercapacitor
  • High-specific-surface-area mesoporous activated carbon and preparation method thereof and application of high-specific-surface-area mesoporous activated carbon in supercapacitor

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Embodiment 1

[0040] Rinse the crushed durian shells with tap water 4-5 times, place them in an air blast drying oven at 80° C. for 36 hours, and pulverize them to obtain durian shell powder with a particle size of less than 200 microns. Dissolve 10g of potassium hydroxide in 30mL of deionized water, add 5g of durian shell powder, stir well, seal and let stand for 12h, then transfer to 55°C blast drying oven for 12h. Grind part of the impregnated material and put it in a porcelain boat. Under the protection of an inert gas, calcinate at 600°C for 2h, the heating rate is 10°C / min, and cool down naturally. The obtained product is ground into powder, and the pH is adjusted by adding 1:6 hydrochloric acid. Neutral to weakly acidic, ultrasonically filtered for 5 minutes, the obtained product was washed with deionized water for 4-5 times, and then placed in a vacuum drying oven at 110°C for 12 hours to obtain activated carbon from durian shells. figure 1 It is its scanning electron microscope pic...

Embodiment 2

[0042] Rinse the crushed durian shells with tap water 4-5 times, place them in an air blast drying oven at 80° C. for 36 hours, and pulverize them to obtain durian shell powder with a particle size of less than 200 microns. Dissolve 2.5g of potassium hydroxide in 7.5mL of deionized water, add 5g of durian shell powder, stir well, seal and let it stand for 12h, then transfer it to a 55°C blast drying oven for 12h. Grind part of the impregnated material and place it in a porcelain boat. Under the protection of an inert gas, calcinate at 700°C for 1 hour, with a heating rate of 8°C / min, and cool down naturally. Grind the obtained product into powder, and add 1:6 hydrochloric acid to adjust the pH to Neutral to weakly acidic, ultrasonically filtered for 5 minutes, the obtained product was washed with deionized water for 4-5 times, and then placed in a vacuum drying oven at 110°C for 12 hours to obtain activated carbon from durian shells. The specific surface area is 3523m 2 g -1 ,...

Embodiment 3

[0044] Rinse the crushed durian shells with tap water 4-5 times, place them in an air blast drying oven at 80° C. for 36 hours, and pulverize them to obtain durian shell powder with a particle size of less than 200 microns. Dissolve 5g of potassium hydroxide in 15mL of deionized water, add 5g of durian shell powder, stir well, seal and let stand for 12h, then transfer to 55°C blast drying oven for 12h. Grind part of the impregnated material and place it in a porcelain boat. Under the protection of an inert gas, calcinate at 650°C for 1 hour, with a heating rate of 8°C / min, and cool down naturally. Grind the obtained product into powder, and add 1:6 hydrochloric acid to adjust the pH to Neutral to weakly acidic, ultrasonically filtered for 5 minutes, the obtained product was washed with deionized water for 4-5 times, and then placed in a vacuum drying oven at 110°C for 12 hours to obtain activated carbon from durian shells. Nitrogen adsorption and desorption curves show that th...

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Abstract

The invention discloses high-specific-surface-area mesoporous activated carbon and a preparation method thereof and an application of the high-specific-surface-area mesoporous activated carbon in a supercapacitor. The preparation method of the activated carbon includes: placing durian shell powder into an activator solution for soaking prior to drying and placing under protective atmosphere; performing high temperature carbonization to obtain the activated carbon with the high specific surface area as high as 3712m<2>g-<1> and the mesoporous rate reaching 29%. Good electrochemical performance is achieved by using the activated carbon as electrode materials for the supercapacitor; the preparation method of the activated carbon is simple in process, short in production cycle, low in cost and favorable for industrialized production, and a good path is provided for resource utilization of biological waste durian shells.

Description

technical field [0001] The invention relates to an activated carbon material, in particular to an activated carbon material with a high specific surface area and rich in mesopores prepared from durian shells, and its application as an electrode material for a supercapacitor, belonging to the technical field of supercapacitors. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage device that combines the advantages of traditional capacitors and batteries. Due to its higher energy density than traditional capacitors and higher power density and longer cycle life than batteries, it has received worldwide attention in recent years. It has been widely used in industrial electronics, electric vehicles, solar photovoltaic industry, wind power generation, electric power smart grid and other fields. According to the storage and conversion mechanism of electric energy, supercapacitors are divided into electric doubl...

Claims

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Application Information

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IPC IPC(8): C01B32/342C01B32/348C01B32/324H01G11/34H01G11/86H01G11/24
Inventor 纪效波赵刚刚侯红帅
Owner CENT SOUTH UNIV
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