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Amination-acidification modified activated carbon material

An activated carbon and modified technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of corrosion equipment, limited increase of double capacitance value, limited specific surface area value, etc., to reduce self-discharge and increase pseudo Capacitance value, the effect of increasing the specific capacitance value

Inactive Publication Date: 2014-06-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method not only seriously corrodes the equipment, but also the specific surface area value of the activated carbon treated by the alkalization activation method is limited, and the double capacitance value is also limited.

Method used

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  • Amination-acidification modified activated carbon material
  • Amination-acidification modified activated carbon material
  • Amination-acidification modified activated carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 0.4g of activated carbon and 0.8g of sodium dodecylbenzenesulfonate, add 60mL of 1M H 2 SO 4 Medium, ultrasonic 30min;

[0026] (2) Add 1.8mL of aniline into the solution obtained in (1), stir rapidly, and then stir at 0°C for 2h;

[0027] (3) Weigh 1.88g of ammonium persulfate to prepare a solution, add it to the solution in step (2) at a rate of 1 drop per second, and then continue to stir the mixed solution at 0°C for 6 hours;

[0028] (4) Filter the solution obtained after the reaction in step (3) to obtain a black-green solid, which is washed continuously with deionized water and alcohol, and then dried in a vacuum oven at 70°C for 6 hours;

[0029] (5) Put the black-green solid obtained in (4) into a tube furnace at a heating rate of 5°C / min, heat up to 600°C, 700°C, and 800°C for carbonization, and keep it warm for two hours to form N-rich carbon materials;

[0030] (6) Pour concentrated nitric acid (63% to 68% by mass) into the solid obtained in st...

Embodiment 2

[0033] (1) Weigh 0.4g of activated carbon and 1.6g of sodium dodecylbenzenesulfonate, add 60mL of 1M H 2 SO 4 Medium, ultrasonic 30min;

[0034] (2) Add 3.6mL of aniline to the solution obtained in (1), stir rapidly, and then stir at 0°C for 2h;

[0035] (3) Weigh 3.76g of ammonium persulfate to form a solution, add it to the solution in step (2) at a rate of 1 drop per second, and then continue to stir the mixed solution at 0°C for 6 hours;

[0036] (4) Filter the solution obtained after the reaction in step (3) to obtain a black-green solid, which is washed continuously with deionized water and alcohol, and then dried in a vacuum oven at 70°C for 6 hours;

[0037] (5) Put the black-green solid obtained in (4) into a tube furnace at a heating rate of 5°C / min, heat up to 600°C, 700°C, and 800°C for carbonization, and keep it warm for two hours to form N-rich carbon materials;

[0038] (6) Add concentrated nitric acid (63% to 68% by mass) to the solid obtained in step (5) u...

Embodiment 3

[0041] (1) Weigh 0.4g of activated carbon and 0.8g of sodium dodecylbenzenesulfonate, add 60mL of 1M H 2 SO 4 Medium, ultrasonic 30min;

[0042] (2) Add 1.8mL of aniline into the solution obtained in (1), stir rapidly, and then stir at 0°C for 2h;

[0043] (3) Weigh 1.88g of ammonium persulfate to prepare a solution, add it to the solution in step (2) at a rate of 1 drop per second, and then continue to stir the mixed solution at 0°C for 6 hours;

[0044] (4) Filter the solution obtained after the reaction in step (3) to obtain a black-green solid, which is washed continuously with deionized water and alcohol, and then dried in a vacuum oven at 70°C for 6 hours;

[0045] (5) Put the black-green solid obtained in (4) into a tube furnace at a heating rate of 5°C / min, heat up to 600°C, 700°C, and 800°C for carbonization, and keep it warm for two hours to form N-rich carbon materials;

[0046] (6) Add concentrated nitric acid (63% to 68% by mass) to the solid obtained in step (5...

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Abstract

The invention discloses an amination-acidification modified activated carbon material. The amination-acidification modified activated carbon material is obtained by virtue of an amination process and an acidification process, namely a polymerization reaction is carried out on phenylamine on the surface of activated carbon, so as to generate polyaniline, then functional groups rich in N are formed on the surface of carbon through high temperature treatment, and finally an acidification reaction is carried out with nitric acid and then the functional groups rich in O are formed on the surface of the activated carbon. The obtained modified activated carbon material has the advantages that rich nitrogenous and oxygenous functional groups are formed on the surface, so that faradaic pseudocapacitance of the modified activated carbon material is increased, specific capacitance of the modified activated carbon material is greatly increased, ash composition in the original activated carbon is effectively removed, self discharge of the activated carbon is reduced, and electrochemical performance of the activated carbon is improved.

Description

technical field [0001] The invention relates to activated carbon materials, in particular to a method for modifying cheap carbon materials with low electrochemical properties into negative electrode materials with high electrochemical properties through amination-acidification. Background technique [0002] Activated carbon material has become the most ideal supercapacitor anode material in practical applications due to its good physical and chemical properties, abundant raw material sources and high energy storage cost performance. It also has the advantages of low price, large specific surface area, and adjustable pore structure. It can be used To make activated carbon with high specific surface area, it is an ideal material for preparing battery negative electrode. Activated carbon can obtain different pore structures through different processing, and is also widely used in the preparation of high-density and high-strength carbon materials, so how to obtain activated carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C01B32/354
Inventor 侯峰徐姗姗
Owner TIANJIN UNIV
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