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Preparation method for modified actived carbons

A technology of activated carbon and modification, applied in the field of preparation of modified activated carbon, can solve the problems of low working voltage, low hydrogen evolution potential, accelerated water, etc., and achieve the effects of short production cycle, simple preparation process and low equipment investment.

Inactive Publication Date: 2013-04-17
HUNAN FENGRI ELECTRIC GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the hydrogen evolution potential of carbon materials in the hydroelectrochemical system is low, and the decomposition of water will be accelerated during the charging and discharging process. Therefore, in the hydrochemical system, the working voltage of the capacitor or battery of carbon materials is low. Start with the modification of activated carbon

Method used

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  • Preparation method for modified actived carbons
  • Preparation method for modified actived carbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Step 1: Weigh 100 grams of activated carbon, put 5 grams of lead nitrate into a ball milling tank, control the ball-material ratio to 25:1, ball mill the above mixture for 20 minutes, and break the raw materials.

[0027] The second step: get 1.9 grams of potassium hydroxide and put it into the ball mill jar described in the first step, and add 0.1 gram of deionized water, and ball mill the above mixture for 20 minutes to obtain a black powder of activated carbon loaded with lead.

[0028] The third step: drying the powder obtained in the second step, the drying temperature is controlled at 85° C., and the drying time is 0.5 hour.

[0029] Step 4: Put the powder obtained in the third step into a tube furnace for protection with argon gas. The flow rate of argon gas is 70ml / min. Heat treatment at a rate of 5°C / min. The heat treatment temperature is 650°C and kept for 1.5 h, the tube furnace is naturally cooled to room temperature to obtain the modified activat...

Embodiment 2

[0030] Example 2: Step 1: Weigh 500 grams of activated carbon and 50 grams of lead nitrate into a ball mill tank, control the ball-material ratio to 10:1, ball mill the above mixture for 25 minutes, and break the raw materials.

[0031] The second step: get 20 grams of potassium hydroxide and put it into the ball mill jar described in the first step, and add 1.5 grams of deionized water, and ball mill the above mixture for 30 minutes to obtain a black powder of activated carbon loaded with lead.

[0032] The third step: drying the powder obtained in the second step, the drying temperature is controlled at 90° C., and the drying time is 0.5 hour.

[0033] Step 4: Put the powder obtained in the third step into a tube furnace with argon protection, the flow rate of argon gas is 75ml / min, heat treatment at a rate of 5°C / min, the heat treatment temperature is 750°C, and keep it warm for 2h , the tube is naturally cooled to room temperature to obtain the modified activated carbon pr...

Embodiment 3

[0034] Example 3: Step 1: Weigh 1000 grams of activated carbon, put 50 grams of lead acetate into a ball mill tank, control the ball-material ratio to 20:1, ball mill the above mixture for 28 minutes, and break the raw materials.

[0035] The second step: get 19 grams of potassium hydroxide and put it into the ball mill jar described in the first step, and add 2 grams of deionized water, and ball mill the above mixture for 30 minutes to obtain a black powder of activated carbon loaded with lead.

[0036] The third step: drying the powder obtained in the second step, the drying temperature is controlled at 80° C., and the drying time is 1 hour.

[0037] Step 4: Put the powder obtained in the third step into a tube furnace for protection with argon gas. The argon gas flow rate is 80ml / min. Heat treatment at a rate of 5°C / min. The heat treatment temperature is 850°C and kept for 2 hours. , the tube is naturally cooled to room temperature to obtain the modified activated carbon pr...

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Abstract

The invention discloses a preparation method for modified actived carbons. The modified active carbons are actived carbons modified by adopting hydrogen inhibitor; and the hydrogen inhibitor is lead oxide loaded on the surfaces of the actived carbons. The preparation process comprises the following steps: firstly, lead ions are absorbed by using the actived carbons; then the lead ions are deposited on the surfaces of the actived carbons by using alkali; and finally, lead hydrogen is decomposed to lead oxide through the heat treatment, and the lead oxide is loaded on the surfaces of the actived carbons; the actived carbons, lead salt and the alkali are chemically reacted through the ball milling method, and are treated at the high temperature under the protecting air environment to prepare the modified actived carbons. The method has the advantages of simple preparation technique, short production period, facilitation of industrial production, lower equipment investment, environmental friendliness and wide application, and can increase the specific capacitance of the active carbons.

Description

technical field [0001] The invention relates to the technical field of chemical power sources, in particular to a preparation method of modified activated carbon. Background technique [0002] With the rapid development of society, environmental pollution and shortage of traditional energy, people need more efficient and environmentally friendly energy to replace or supplement traditional energy, which leads to more and more demand for hybrid electric vehicles and electric vehicles. Carbon is a commonly used energy storage material. In water-based capacitors or batteries, adding activated carbon powder can increase the energy density and power density of the energy storage element, and can improve the cycle life of the battery. [0003] However, the hydrogen evolution potential of carbon materials in the hydroelectrochemical system is low, and the decomposition of water will be accelerated during the charging and discharging process. Therefore, in the hydrochemical system, t...

Claims

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Application Information

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IPC IPC(8): C01B31/08C01B32/354
Inventor 黎福根唐怀远
Owner HUNAN FENGRI ELECTRIC GROUP
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