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Preparation method of starch-based super-capacitor active carbon material

A supercapacitor, starch-based technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low activated carbon materials and inability to obtain activated carbon materials, and achieve low cost, high yield, and long cycle life. Effect

Active Publication Date: 2017-08-15
南京正森环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, the specific capacitance of activated carbon materials prepared by predecessors is low, only 100-300F / g, and it is impossible to obtain activated carbon materials with ideal specific structure, only by using different chemical, physical, or chemical physical The combined method finally obtained several structures of activated carbon materials

Method used

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  • Preparation method of starch-based super-capacitor active carbon material
  • Preparation method of starch-based super-capacitor active carbon material
  • Preparation method of starch-based super-capacitor active carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Carbonization of raw materials: Carbonize starch-based biomass raw materials at a heating rate of 1°C / min and a final temperature of 150°C for 60 minutes to obtain carbonized materials. Inorganic impurities.

[0032] (2) Immersion treatment of alkaline solution: Potassium hydroxide and deionized water are prepared into an alkaline solution with a mass concentration of 5%, and the carbonized material obtained by carbonization is mixed with the alkaline solution according to the mass ratio of 1:1, and immersed for 1 hour Finally, it is dried in a high-temperature furnace at 350°C to obtain an alkali-carbon mixture.

[0033] (3) Activation: put the alkali-carbon mixture in a calcination furnace, and raise the temperature to a final calcination temperature of 500°C at a heating rate of 10°C / min in an air atmosphere, and then cool down naturally after holding for 30 minutes.

[0034] (4) Washing recovery: After the activation is completed, lower the furnace temperature ...

Embodiment 2

[0036] (1) Carbonization of raw materials: Carbonize starch-based biomass raw materials at a heating rate of 10°C / min and a final temperature of 200°C for 60 minutes to obtain carbonized materials. Inorganic impurities.

[0037] (2) Immersion treatment of alkaline solution: Potassium hydroxide is configured into an alkaline solution with a mass concentration of 50%. According to the ratio of mass ratio 1:4, the carbonized material is mixed with the alkaline solution. Dry at ℃ to get the alkali-carbon mixture.

[0038] (3) Activation: put the alkali-carbon mixture in a calciner, raise the temperature to the final calcination temperature of 800°C at a heating rate of 10°C / min in an air atmosphere, keep it warm for 90min and cool down naturally.

[0039] (4) Washing recovery: After the activation is completed, lower the furnace temperature to room temperature, pickle the activated carbon material after the activation, wash with water and dry, without grinding, you can get a supe...

Embodiment 3

[0041] (1) Carbonization of raw materials: Carbonize starch-based biomass raw materials at a heating rate of 10°C / min and a final temperature of 300°C for 80 minutes to obtain carbonized materials. Inorganic impurities.

[0042] (2) Immersion treatment of alkaline solution: Potassium hydroxide and deionized water are configured into an alkaline solution with a mass concentration of 40%. According to the mass ratio of 1:5, the carbonized material is mixed with the alkaline solution, and after immersion for 12 hours, the Dry it in a high-temperature furnace at 400°C to obtain the alkali-carbon mixture.

[0043](3) Activation: Put the alkali-carbon mixture in a calcination furnace, raise the temperature to the final calcination temperature of 800°C at a heating rate of 20°C / min in an air atmosphere, keep it warm for 60min, and then cool down naturally.

[0044] (4) Washing recovery: After the activation is completed, lower the furnace temperature to room temperature, pickle the ...

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Abstract

The invention discloses a preparation method of a starch-based super-capacitor active carbon material. The preparation method comprises following steps: 1, a starch-based biomass raw material is subjected to low temperature carbonization treatment, an obtained carbonized product is washed respectively with hydrochloric acid, nitric acid, and deionized water so as to remove inorganic impurities; 2, a hydroxide is prepared into an aqueous solution, the obtained aqueous solution is mixed with a starch-based carbonized material obtained in step 1, and an obtained mixed material is subjected to dipping and drying; 3, starch-based carbonized material particles obtained via dipping of the alkaline solution in step 2 are delivered into a calciner for calcining activation at air atmosphere, and natural cooling is adopted for cooling to room temperature; and 4, an active carbon material obtained via activation is subjected to acid pickling, water washing, and drying so as to obtain the powdery starch-based super-capacitor active carbon material without grinding. The raw materials are widely available and cheap; the preparation method is simple; yield is high; product particle size is uniform; the sphere diameter and the specific surface area are controllable; and the preparation method is suitable for instrulized production.

Description

technical field [0001] The invention relates to a starch-based supercapacitor activated carbon and a preparation method thereof, in particular to a method for preparing a supercapacitor activated carbon material through low-temperature carbonization pretreatment of starch-based raw materials and high-temperature alkaline activation. Background technique [0002] Supercapacitors have the characteristics of fast charging speed, high power density, and long life. They are the most effective way to solve the power supply for electric vehicles. It can be used not only as the sole power source for electric vehicles, but also as an auxiliary power source for electric vehicles. Supercapacitors can also be used for power devices such as photovoltaic battery storage, grid stabilization, and radio transmission, as well as starting energy for tanks and rocket traction; the United States, Europe, Japan, etc. are also conducting research on supercapacitors. [0003] After the starch comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/348
CPCC01P2006/12C01P2006/14C01P2006/17C01P2006/40
Inventor 荀波童德军
Owner 南京正森环保科技有限公司
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