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Collaborative graphitization method for amorphous carbon material

A technology of amorphous carbon and graphitization, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of low graphitization degree and poor uniformity of carbon materials, and achieve remarkable graphitization effect and process Simplicity and the effect of expanding the range of application

Inactive Publication Date: 2012-10-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the degree of graphitization of the carbon material obtained by this method is not high, and the uniformity is not good.

Method used

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  • Collaborative graphitization method for amorphous carbon material
  • Collaborative graphitization method for amorphous carbon material
  • Collaborative graphitization method for amorphous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of activated carbon material with ferric nitrate adsorbed

[0032] Weigh 300 mg of commercially available activated carbon, disperse it in 25 mL of ferric nitrate solution with a concentration of 0.5 mol / L at room temperature, stir for 2 hours, then let it stand for 24 hours, after filtering, put the filtered filter cake in an oven , and dried at 120°C for 24 hours to obtain an activated carbon material adsorbed with ferric nitrate.

[0033] (2) Graphitization of activated carbon material with adsorbed ferric nitrate

[0034] Weigh 200 mg of the activated carbon material with ferric nitrate adsorbed obtained in (1), weigh 500 mg of metallic sodium, put them in an alumina crucible with a cover and place the crucible in a tube furnace, blow in nitrogen, and heat at 5°C The temperature was raised to 800°C at a rate of 1 / min and kept at this temperature for 6h, and then lowered to room temperature to obtain a graphitized carbon material.

[0035] (3) Purif...

Embodiment 2

[0041] (1) Preparation of activated carbon material with ferric nitrate adsorbed

[0042] Weigh 400 mg of activated carbon, disperse it in 25 mL of ferric nitrate solution with a concentration of 1.0 mol / L at room temperature and stir for 2 h, then let it stand for 24 h, after filtering, place the sample in an oven and dry at 120 °C for 24 h, An activated carbon material having adsorbed ferric nitrate was obtained.

[0043] (2) Graphitization of activated carbon materials with adsorbed ferric nitrate

[0044] Weigh 200 mg of the activated carbon material with ferric nitrate adsorbed obtained in (1), weigh 500 mg of metallic sodium, put them in an alumina crucible with a cover and place the crucible in a tube furnace, blow in nitrogen, and heat at 5°C The temperature was raised to 800°C at a rate of 1 / min and kept at this temperature for 6h, and then lowered to room temperature to obtain a graphitized carbon material.

[0045] (3) Purification of graphitized carbon materials ...

Embodiment 3

[0049] (1) Preparation of activated carbon material with ferric nitrate adsorbed

[0050] Weigh 300 mg of activated carbon, disperse it in 25 mL of ferric nitrate solution with a concentration of 0.5 mol / L at room temperature and stir for 2 h, then let it stand for 24 h, after filtering, place the sample in an oven and dry at 120 °C for 24 h, An activated carbon material having adsorbed ferric nitrate was obtained.

[0051] (2) Graphitization of activated carbon material with adsorbed ferric nitrate

[0052] Weigh 200 mg of the activated carbon material with ferric nitrate adsorbed obtained in (1), weigh 500 mg of metallic sodium, put them in an alumina crucible with a cover and place the crucible in a tube furnace, blow in nitrogen, and heat at 10°C The temperature was raised to 600°C at a rate of 1 / min and kept at this temperature for 6h, and then lowered to room temperature to obtain a graphitized carbon material.

[0053] (3) Purification of graphitized carbon materials ...

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Abstract

The invention relates to a collaborative graphitization method for an amorphous carbon material. The collaborative graphitization method comprises the following steps of: weighing the amorphous carbon material according to the molar ratio of the amorphous carbon material to metal salts being 1:(0.01-0.99); dispersing the amorphous carbon material and the metal salts into 0.1-5mol / l metal salt solution by stirring, standing and filtering; drying filter slag at 120DEG C to obtain the amorphous carbon material adsorbing the metal slats; weighing the amorphous carbon material adsorbing the metal slats and active metal according to the mass ratio of 1: (0.1-5) and feeding two raw materials in a crucible with a cover; feeding the crucible into a tubular furnace; raising the temperature of the crucible in inert gas at the speed of 1-50DEG C / min to 200-1200DEG C and maintaining the temperature for 1-72 hours; and cooling to room temperature and purifying to obtain the amorphous carbon material. The collaborative graphitization method disclosed by the invention has the advantages of simple process, favorable repeatability, low energy consumption, uniformity in material quality and remarkable graphitization effect; and on the premise that the porous characteristic of a carbon material is maintained to the maximum extent, a carbon-material hole structure is optimized, the conductivity of the carbon material is improved and the application range of the amorphous carbon material is widened.

Description

technical field [0001] A method for synergistic graphitization of amorphous carbon materials, relating to a method for preparing graphitized carbon materials. The invention relates to a method for transforming an amorphous carbon material into a graphitized carbon material at a temperature of 200-1200 DEG C by using the synergistic effect of a metal salt and a molten active metal, belonging to the technical field of carbon materials. Background technique [0002] Amorphous carbon materials have the advantages of high specific surface area, corrosion resistance, conductivity, and low price, and can be used in fields such as electroadsorption materials, energy materials (including electric double layer capacitors, battery materials, etc.). Graphitization of amorphous carbon materials can improve the conductivity of amorphous carbon materials, further reduce the resistance of amorphous carbon materials, optimize its pore structure, and improve capacitance stability, thereby exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/205
Inventor 徐子颉夏炳忠王芬芬吉涛
Owner TONGJI UNIV
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