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Method for preparing porous carbon for electrochemical capacitor from egg white used as raw material

A technology of egg white and electrochemistry, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve the effect of abundant raw materials, cheap and easy-to-obtain raw materials

Inactive Publication Date: 2014-08-13
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Eggs are a very common food in human life, but unfortunately, so far, there is no relevant report on the preparation of porous carbon from egg whites

Method used

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  • Method for preparing porous carbon for electrochemical capacitor from egg white used as raw material
  • Method for preparing porous carbon for electrochemical capacitor from egg white used as raw material
  • Method for preparing porous carbon for electrochemical capacitor from egg white used as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Buy ordinary eggs at the Ma’anshan Vegetable Market, put the egg whites of two eggs into a beaker, pour 200mL of absolute ethanol into the beaker to precipitate the protein, and dry the precipitated protein in a vacuum drying oven at 60°C, then take 10g and place it in a quartz boat In a tube furnace with nitrogen gas, the temperature was raised to 600°C at a rate of 5°C / min and kept for 2h. Then, the carbon precursor obtained by the above-mentioned pre-carbonization was fully mixed with the activator at a mass ratio of 1:3. The time is 2h. The above-mentioned activated product was washed with 0.1 mol hydrochloric acid, and then washed with deionized water until neutral, and then dried to obtain porous carbon. Such as figure 1 As shown, the specific surface area of ​​the obtained porous carbon is 1450m 2 g -1 .

[0032] Take 7mg of the prepared porous carbon, mix evenly according to the ratio of active material: acetylene black: polytetrafluoroethylene = 7:2:1, and...

Embodiment 2

[0035] Buy ordinary eggs at the Ma’anshan Vegetable Market, put the egg whites of two eggs into a beaker, pour 200mL of acetone into the beaker to precipitate the protein, and dry the precipitated protein in a vacuum oven at 60°C, then take 10g and place it in a quartz boat. In a tube furnace with argon gas, the temperature was raised to 450°C at a rate of 3°C / min and kept for 2h. Then, the carbon precursor obtained by the above pre-carbonization was fully mixed with the activator at a mass ratio of 1:2. The activator was potassium hydroxide, and then the temperature was raised to 700°C at a rate of 3°C / min under an argon atmosphere for activation. The activation time is 2h. The above-mentioned activated product was washed with 0.1 mol sulfuric acid, and then washed with deionized water until neutral, and then dried to obtain porous carbon.

[0036] The electrochemical test method of porous carbon is the same as that of Example 1.

Embodiment 3

[0038] Buy ordinary eggs at the Ma’anshan Vegetable Market, take the egg whites of two eggs in a beaker, add sodium chloride solution to the beaker to precipitate the protein, and dry the precipitated protein in a vacuum oven at 60°C, then take 10g and put it in a quartz boat , the temperature was raised to 500°C at a rate of 10°C / min in a tube furnace filled with argon, and kept for 2h. Then, the carbon precursor obtained by the above-mentioned pre-carbonization is fully mixed with the activator at a mass ratio of 1:4. The activator is sodium hydroxide, and then the temperature is raised to 900°C at a rate of 10°C / min under an argon atmosphere for activation. The activation time is 5h. The above-mentioned activated product was washed with 0.1 mol of nitric acid, and then washed with deionized water until neutral, and then dried to obtain porous carbon.

[0039] The electrochemical test method of porous carbon is the same as that of Example 1.

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Abstract

The invention discloses a method for preparing a porous carbon material for an electrochemical capacitor from egg white used as a raw material, and belongs to the technical field of novel energy sources. The preparation method comprises the following steps: firstly adding neutral salts or an organic solvent into egg white used as the raw material to separate out protein, and carrying out high-temperature pre-carbonization on the protein so as to obtain a carbon precursor; then obtaining the high-performance porous carbon material for the supercapacitor by use of an alkali metal hydroxide activation method, wherein egg white is taken as a raw material. The method disclosed by the invention is capable of using biological materials and has the advantages of novel raw materials, low cost and wide sources, the porous carbon material prepared has the advantages of rich microporous / mesoporous multi-level pore structures, high specific surface area and excellent electrochemical capacitance performance and has broad application prospects in the field of electrochemical capacitors.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a preparation method of a porous carbon material for an electrochemical capacitor. Background technique [0002] Electrochemical capacitors, also known as supercapacitors, are a new type of power electronic components. It has the characteristics of high specific energy, high specific power and long cycle life. It is widely used in many fields such as microcomputer backup power supply, solar charger, alarm device, household appliances, camera flash light and aerospace high pulse generator, especially in The field of electric vehicles has attracted extensive attention. [0003] Porous carbon material is one of the main electrode materials of electrochemical capacitors, and its energy storage mechanism is to realize its high-efficiency charge storage by forming electric double layer capacitance. At present, the porous carbon materials used in electrochemical capacit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B32/318C01B32/348
Inventor 原长洲周璐侯林瑞张龙海杨龙张皞
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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