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Method for preparing microbiologically treated carbon material for supercapacitor

A supercapacitor and microbial treatment technology, applied in chemical instruments and methods, fermentation, inorganic chemistry, etc., can solve problems such as preparing supercapacitors

Inactive Publication Date: 2014-08-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] During the fermentation process of starch, part of the starch is decomposed to produce a large number of bacteria, and the special microporous structure formed by the fermentation product filling is the prerequisite for the preparation of high-performance activated carbon for supercapacitors, which is different from other raw materials for the preparation of activated carbon for supercapacitors. method, so far, there is no report on the preparation of activated carbon materials for supercapacitors by fermenting and cultivating starch fermented material

Method used

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  • Method for preparing microbiologically treated carbon material for supercapacitor
  • Method for preparing microbiologically treated carbon material for supercapacitor
  • Method for preparing microbiologically treated carbon material for supercapacitor

Examples

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Embodiment 1

[0028] Weigh 20g of wheat starch and 0.2g of yeast powder, mix them evenly, add water and stir, and ferment at room temperature for 6 hours; place the fermented material in an oven at a temperature of 90°C, and dry it for 20 hours; dry the dried material Put it in a carbonization furnace with a carbonization temperature of 550°C and a carbonization time of 6 hours to obtain a carbonized material; mix the carbonized material with potassium hydroxide at a mass ratio of 1:2, dissolve the potassium hydroxide in water, and mix its aqueous solution with Mix the carbonized material evenly, and then dry it at 100°C; place it in an activation furnace after removing water, the activation temperature is 800°C, and the activation time is 2.5 hours; the activation material is ground to a particle size of 200 mesh, and then washed with water, 6% Wash with hydrochloric acid, then wash with water until the filtrate is clear and the pH reaches about 7; then dry the activated material obtained t...

Embodiment 2

[0033] Weigh 20g of cornstarch and 0.4g of yeast powder, mix them evenly, add water and stir, and ferment at 20°C for 6 hours; put the fermented material in an oven at 150°C, and dry it for 0.5 hours; dry the dried fermented The material is placed in a carbonization furnace, the carbonization temperature is 900°C, and the carbonization time is 0.5 hours to obtain the carbonized material; the carbonized material and potassium hydroxide are mixed in a mass ratio of 1:2, and the potassium hydroxide is dissolved in water, and its aqueous solution is Mix evenly with the carbonized material, then dry at 100°C; place in an activation furnace after removing water, the activation temperature is 500°C, and the activation time is 8 hours; the activation material is ground to a particle size of 100 mesh and then washed with water, 6 % hydrochloric acid, and then washed until the filtrate is clear and the pH reaches about 7; then the activated material obtained by filtration is dried, first...

Embodiment 3

[0036] Weigh 20g of tapioca starch and 0.02g of yeast powder, mix them evenly, add water and stir, and ferment at 25°C for 24 hours; put the fermented material in an oven at 70°C, and dry it for 24 hours; dry the dried fermented The material is placed in a carbonization furnace, the carbonization temperature is 270 ° C, and the carbonization time is 12 hours to obtain the carbonized material; the carbonized material is mixed with potassium hydroxide and sodium hydroxide in a mass ratio of 1:2, potassium hydroxide and hydroxide After the sodium is dissolved in water, mix its aqueous solution with the carbonized material evenly, and then dry it at 100°C; after removing the water, place it in an activation furnace with an activation temperature of 950°C and an activation time of 0.5 hours; grind the activation material to the particle size After being 400 mesh, it was washed with water, washed with 6% hydrochloric acid, and then washed with water until the filtrate was clarified a...

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Abstract

The invention relates to a method for preparing a microbiologically treated carbon material for a supercapacitor, which comprises the following steps that activated carbon is obtained by fermentation, carbonization and activation by taking starch as a raw material, wherein the carbonization is performed in such a manner that a fermented material is dried and then placed in a carbonization furnace to be carbonized at a temperature of 270 to 900 DEG C for 0.5 to 12 hours to obtain a carbonized material, and the activation is performed in such a manner that the carbonized material and an activating agent are uniformly mixed according to a mass ratio of 1:2 to 7 and then are placed in an activation furnace to be activated at a temperature of 500 to 950 DEG C for 0.5 to 8 hours to obtain an activated material; and the activated material is crushed to pass through a 100 to 500-mesh sieve to obtain activated powder, and the activated powder is sequentially washed with water and acids until a filtrate is clarified and the pH value is 4 to 7, and finally the filtrate is dried to obtain the activated carbon. The activated carbon has a large specific surface area, reasonable pore distribution and high specific capacitance.

Description

1. Technical field [0001] The invention relates to a method for preparing a carbon material for a supercapacitor treated by microorganisms, in particular to a method for preparing activated carbon, an electrode material for a supercapacitor, using starch as a raw material. 2. Background technology [0002] Supercapacitor is a new type of power energy storage element that has emerged with the breakthrough of material science in the past ten years. Supercapacitors were once listed as one of the world's seven major scientific and technological discoveries of the year, and are considered to be a revolutionary development in the field of energy storage and will replace traditional batteries in some fields. There is no chemical reaction in the charging and discharging process of the supercapacitor, so it has a fast charging speed when storing electric energy, is not afraid of overcharging and discharging, the effective utilization rate of electric energy can reach more than 95%, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/00C12P1/02
Inventor 李学良郭威肖正辉罗梅刘沛
Owner HEFEI UNIV OF TECH
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