Preparation method of grading porous carbon material

A technology of hierarchical porous and carbon materials, applied in the preparation/purification of carbon, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of high energy consumption and long time consumption, and achieve large quantities, easy availability, Effect of small particle size and improved cycle stability

Active Publication Date: 2012-12-26
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of segmental heating adopted takes a long time and consumes a lot of energy

Method used

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  • Preparation method of grading porous carbon material
  • Preparation method of grading porous carbon material
  • Preparation method of grading porous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Porous Carbon HPC 4.2 / 16.8 / 6 Concrete preparation process is as follows:

[0020] (1) Pretreatment of coal tar pitch: Grind coal tar pitch to a particle size of no more than 100 μm to obtain pretreated coal tar pitch. The air-dried basis moisture of the obtained coal tar pitch is 1.13%, the ash content is 0.16%, and the volatile content is 41.21%. Carbon is 57.50%, and the softening point is 110°C.

[0021] (2) Grinding of reactants: Weigh 4.2g of the pretreated coal tar pitch obtained in step (1) into a mortar, add 16.8g of ferric oxide with a particle size of 20nm, and add 6g of solid potassium hydroxide. The reaction was obtained after triturating the mixture for 1 h.

[0022] (3) Preparation of porous carbon: move the reactant raw material obtained in step (2) into a corundum crucible, put the corundum crucible in an atmosphere furnace, and feed high-purity nitrogen as a protective gas throughout the process, at a rate of 5°C / min The heating rate is he...

Embodiment 2

[0024] Example 2: Porous carbon HPC 7 / 14 / 6 Concrete preparation process is as follows:

[0025] (1) Pretreatment of coal tar pitch: implemented in the same manner as step (1) in Example 1.

[0026] (2) Carry out the same method as step (2) in Example 1, except that 7g of coal tar pitch, 14g of 20nm nanometer ferric oxide, and 6g of potassium hydroxide are weighed.

[0027] (3) Carry out the same method as step (3) in Example 1.

[0028] (4) Follow the same method as step (4) in Example 1, except that the amount of 2M dilute sulfuric acid added is 240mL, and the obtained porous carbon material is marked as HPC 7 / 14 / 6 .

Embodiment 3

[0029] Example 3: Porous Carbon HPC 9 / 12 / 6 Concrete preparation process is as follows:

[0030] (1) Pretreatment of coal tar pitch: implemented in the same manner as step (1) in Example 1.

[0031] (2) Carry out the same method as step (2) in Example 1, except that 9g of coal tar pitch, 12g of 20nm ferric oxide, and 6g of potassium hydroxide are weighed.

[0032] (3) Carry out the same method as step (3) in Example 1.

[0033] (4) Follow the same method as step (4) in Example 1, except that the amount of 2M dilute sulfuric acid added is 210mL, and the obtained porous carbon material is marked as HPC 9 / 12 / 6 .

[0034] The pore structure and yield analysis results of the hierarchical porous carbon materials obtained in Examples 1-3 are listed in Table 1.

[0035] Table 1 Analysis results of porous carbon material pore structure and yield in Examples 1-3

[0036]

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Abstract

The invention discloses a preparation method of a grading porous carbon material, and belongs to the technical field of carbon material preparation. The method comprises the following steps: getting cheap coal tar pitch as the carbon source, nanometer iron sesquioxide as a template, and potassium hydroxide as an active agent; grinding the three components; transferring the mixture into a corundum crucible; and heating in an atmosphere furnace, so as to obtain the grading porous carbon material for electrochemical electric container, wherein the grading porous carbon material has the specific surface area between 1157 to 1330m<2> / g, the total pore volume ranges from 0.69 to 1.35cm<3> / g, the average aperture ranges from 2.39 to 4.05nm; the ratio of the pore volume of the non-micropore to the total pore volume ranges from 37.7 to 65.9%; and the yield of the porous carbon ranges from 32.6 to 52.2%. The grading porous carbon material prepared via the method provided by the invention serves as the electrode material of the electrochemical electric container, and is good in stability and excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a preparation method of hierarchical porous carbon material. Background technique [0002] Activated carbon has a well-developed pore structure and special surface chemical properties, and is the main electrode material for supercapacitors. However, the slow transport velocity of electrolyte ions in the micropores of activated carbon limits its effective utilization of micropores. Hierarchical porous carbons rich in mesopores are favored for the rapid transport of electrolyte ions. Among them, the mesopores between 2-50nm can reduce the transmission resistance of electrolyte ions in the pores and shorten the transmission distance of electrolyte ions in the pores, so that the hierarchical porous carbon electrode has excellent power characteristics. [0003] The methods for preparing hierarchical porous carbon include template method and chemical a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/05
Inventor 何孝军赵楠凌平华王晓婷张小勇郑明东余谟鑫
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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