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Process of preparing active carbon with high specific surface area and process of making super capacitor

A high specific surface area, supercapacitor technology, applied in the direction of capacitors, electrolytic capacitors, fixed capacitor electrodes, etc., can solve the problems that ordinary activated carbon is not suitable, and achieve the effect of simple and fast charging and discharging, wide temperature range and small size

Inactive Publication Date: 2006-08-02
HUNAN SCI & TECH RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, ordinary activated carbon is not suitable for making supercapacitor electrodes

Method used

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  • Process of preparing active carbon with high specific surface area and process of making super capacitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: a kind of preparation method of activated carbon with high specific surface area, the steps are:

[0031] (1) Take petroleum coke, dry it in an oven at 100°C-120°C, cool it naturally to normal temperature, and pulverize it to pass through a 100-mesh sieve;

[0032] (2) Take KOH and petroleum coke by weighing the mass ratio of KOH and petroleum coke powder as 5: 1, mix uniformly;

[0033] (3) The mixture is placed in a nickel crucible, heated to 850° C. in a protective atmosphere (nitrogen), and kept for 4 hours;

[0034] (4) Cool to normal temperature with the furnace, wash with deionized water to neutral after taking it out;

[0035] (5) drying, that is to say.

Embodiment 2

[0036] Embodiment 2: a kind of preparation method of activated carbon of high specific surface area, the steps are:

[0037] (1) Take petroleum coke, dry it in an oven at 100°C-120°C, cool it naturally to normal temperature, and pulverize it to pass through a 100-mesh sieve;

[0038] (2) Take KOH and petroleum coke powder by weighing the mass ratio of KOH and petroleum coke powder as 2: 1, mix uniformly;

[0039] (3) Place the mixture in a nickel crucible, heat it to 950°C in a protective atmosphere (argon), and keep it warm for 2 hours;

[0040] (4) naturally cool to normal temperature with the furnace, wash with deionized water to neutrality after taking it out;

[0041] (5) drying, that is to say.

Embodiment 3

[0042] Embodiment 3: a kind of supercapacitor manufacturing method, its steps are:

[0043] (1) Preparation of activated carbon electrode:

[0044] a. Take the specific surface area as 2000-3000m 2 / g, high specific surface area activated carbon with mesoporosity ≥ 50%, ground to a particle size of less than 0.075mm;

[0045] b. Add 5% PTFE emulsion, 5% conductive graphite powder, and 0.5% CMC according to the mass ratio, and stir at a high speed to make it a uniformly mixed slurry;

[0046] c. coating the slurry on the nickel foam and drying;

[0047] d. Use a finish rolling mill to roll into electrode sheets with a thickness of 0.1-0.5mm;

[0048] (2) A modified non-woven fabric diaphragm is arranged between two adjacent electrode sheets;

[0049] (3) Several (such as 3-15, etc.) electrode sheets are connected in parallel, and the two poles of the electrode sheets are respectively welded on the two poles, and then put into the plastic shell;

[0050] (4) Pour KOH soluti...

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Abstract

The process of preparing active carbon with great specific surface area includes the steps of stoving and crushing petroleum coke as material, mixing with KOH in certain ratio, heating and maintaining temperature in no-oxygen environment, cooling and washing with deionized water to neutrality. The process of making one kind of super capacitor includes mixing the active carbon powder possessing great specific surface area with adhesive, conducting graphite powder and dispersant in certain proportion, painting the mixture to foamed nickel, stoving, rolling into electrode sheets, adding diaphragm of modified non-woven fabric between adjacent electrode sheets, connected electrode sheets in parallel and setting inside a casing, and filling with electrolyte. The active carbon of the present invention has specific surface area as high as 2000-3000 sq m / g and medium pore rate not lower than 50 %, and is used as material for super capacitor with high performance / cost ratio and other advantages.

Description

technical field [0001] The invention relates to a method for preparing activated carbon with a high specific surface area and a method for manufacturing a supercapacitor. Background technique [0002] Ordinary electrochemical energy storage elements realize the mutual conversion of chemical energy and electrical energy through oxidation-reduction reactions, and the oxidation-reduction reactions that occur on the surface or inside of electrode materials generally cannot be completed in a short time, so they cannot meet high specific energy requirements. power and long cycle life requirements. Supercapacitors have the advantages of large capacity, small size, simple and fast charging and discharging, wide temperature range, good voltage retention, and unlimited charging and discharging times. They can be used as backup power for microcomputer memory and auxiliary power for electric vehicles. Therefore, It has received widespread attention in recent years. [0003] Supercapac...

Claims

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Application Information

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IPC IPC(8): C01B31/08H01G4/008H01G9/042
CPCY02E60/13
Inventor 唐冬汉王义高刘洪波张红波
Owner HUNAN SCI & TECH RES & DEV CENT
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