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Preparation method of high superficial area porous carbon material

A high specific surface area, porous carbon technology, applied in the direction of electrical components, electrolytic capacitors, battery electrodes, etc., can solve the problems of long synthesis cycle and achieve the effect of short preparation cycle, simple process and high energy density

Inactive Publication Date: 2006-09-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has an advantage in the price of raw materials, but it does not solve the problem of long synthesis cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: Weigh 5.6g resorcinol, 8.3g 37% formaldehyde solution, 15g deionized water and 11.2g potassium hydroxide respectively and place in a 50ml beaker to form a solution, and pack into a sealed container. It was placed in an oven at 90° C. for 1 day to obtain an aqueous phase gel. The aqueous phase gel was dried in an oven at 120°C for 3 days under normal pressure, and then carbonized. During the carbonization process, high-purity N 2 As a protective gas, the heating rate is 3°C / min, the final temperature is 700°C, and the constant temperature time is 60min. After cooling, the sample is washed with water and dried to obtain a porous carbon material product. N 2 The BET specific surface area of ​​the adsorption test is 1583cm 2 / g, average pore diameter 3.2nm, pore volume 0.668cm 3 / g.

Embodiment 2

[0015] Embodiment 2: Change the potassium hydroxide amount in embodiment 1 to 5.6g, other conditions are the same as embodiment 1, obtain porous carbon material. N 2 The BET specific surface area of ​​the adsorption test is 522m 2 / g, average pore diameter 4.4nm, pore volume 0.304cm 3 / g.

Embodiment 3

[0016] Embodiment 3: Change the amount of potassium hydroxide in embodiment 1 to 22.4g, and other conditions are the same as embodiment 1, to obtain a high specific surface area porous carbon material. N 2 The BET specific surface area of ​​the adsorption test is 2760m 2 / g, average pore diameter 2.5nm, pore volume 1.347cm 3 / g.

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Abstract

A porous carbon with high specific surface area used as the electrode of super capacitor and lithium battery is prepared through proportionally dissolving resorcin, formaldehyde, and potassium (or sodium) hydroxide as catalyst in water, laying aside at 80-95 deg.C for 1-3 days to obtaining water-phase gel, drying, carbonifying at 650-900 deg.C for 30-180 min, water washing and drying.

Description

technical field [0001] The invention relates to the field of preparation of electrode materials for supercapacitors, fuel cells, lithium batteries and electric adsorption devices, and also belongs to the technical field of preparing porous carbon materials with high specific surface area through polycondensation of aldehydes and phenols. Background technique [0002] Carbon airgel is a new type of porous and amorphous nano-carbon material. Compared with traditional activated carbon materials, carbon airgel has good electrical conductivity, large specific surface area, wide range of density changes, and pore size distribution concentrated in the mesopores. It is an ideal electrode material for preparing supercapacitors with high power density and high energy density. However, the key factors limiting the commercial application of carbon aerogels are the complex preparation process and long synthesis cycle of carbon aerogels. The existing raw materials and processes for prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01G9/042H01M4/38
CPCY02E60/13Y02E60/10
Inventor 胡浩权朱玉东
Owner DALIAN UNIV OF TECH
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