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A kind of preparation method of porous carbon and product thereof

A technology of porous carbon and biomass carbon source, applied in nano-carbon, hybrid capacitor electrodes, etc., can solve the problems of a large number of acids and bases, complicated steps, difficult to increase specific surface area, etc. The effect of a large proportion of mesoporous and mesoporous

Active Publication Date: 2015-09-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] But there are some common shortcomings in these activation methods at present: a) the activation process needs to use a large amount of acid and alkali, need to carry out follow-up washing to remove harmful environment
The disadvantage of the hard template method is that it involves the use and removal of a large number of templates, the steps are complicated and the specific surface area is difficult to increase

Method used

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  • A kind of preparation method of porous carbon and product thereof
  • A kind of preparation method of porous carbon and product thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Add 2g of fructose, 10mg of potassium polystyrene sulfonate and 30ml of water into a 100ml hydrothermal kettle, and seal the reaction in an oven at 180°C for 12h. The material was taken out, washed and dried, and then calcined at 800°C for 1 hour in an air atmosphere to obtain porous carbon. by N 2 Adsorption-desorption test, the particle size, specific surface area and average pore diameter data of the obtained porous carbon are shown in Table 2.

Embodiment 2～15

[0032] Add 6g of different carbon sources, polyvinyl dimethyl ammonium chloride and 50ml of water in a certain mass ratio to the carbon source into a 100ml hydrothermal kettle, and take it out after hydrothermal reaction in an oven at a certain temperature for a period of time , after washing and drying, calcining in air atmosphere at a certain temperature for 1h to obtain porous carbon. The types, proportions and reaction conditions of the reaction raw materials are shown in Table 1. by N 2 Adsorption and desorption experiments, the particle size, specific surface area and average pore diameter data of the obtained porous carbon are shown in Table 2.

[0033] Table 1

[0034]

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PUM

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Abstract

The invention discloses a preparation method of porous carbon and a product thereof. The preparation process of the method comprises the following steps: uniformly mixing a biomass carbon source, a structure-directing agent and water to obtain mixed liquor; carrying out a hydrothermal reaction; cooling, washing, drying and calcining to obtain the porous carbon, wherein the mass ratio of the structure-directing agent to the biomass carbon source is 1:5000-1:50; the structural guiding agent is ionic polyelectrolyte. The invention further discloses porous carbon prepared by using the method. The particle diameter of the porous carbon is 50-100 nanometers, the BET specific surface area is 1000-2000m<2> / g, the BJH beverage aperture is 2-10 nanometers, the pore volume is 0.8-1.2cm<3> / g, and meso pores account for 50-70 percent of the total pore volume. A super capacitor manufactured by taking the porous carbon as an electrode material has the advantages of high activity, low resistance and large specific capacitance, and the maximum specific capacitance value can be up to 223F / g.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to a method for preparing porous carbon used for supercapacitor electrode materials and products thereof. Background technique [0002] A supercapacitor is a new type of energy storage device that combines the power characteristics of a capacitor with the high energy storage performance of a battery. It has the advantages of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. It is widely used in Computer electronics, consumer electronics, industrial electronics, energy and military and other fields. It is worth mentioning its application in the energy field. With its excellent characteristics, supercapacitors can partially or completely replace traditional chemical batteries for vehicle traction power and starting energy, which can reduce oil consumption and reduce dependence on oil imports. , effectively solve the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02H01G11/24C01B32/15
Inventor 王勇巩玉同
Owner ZHEJIANG UNIV
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