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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 difficult to increase specific surface area, a large amount of acid and alkali, complicated steps, etc., and achieve adjustable and renewable mesoporous micropore ratio. Cost, effect of uniform particle size distribution

Active Publication Date: 2014-05-21
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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  • Preparation method of porous carbon and product thereof
  • Preparation method of porous carbon and product thereof

Examples

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Effect test

Embodiment 1

[0030] 2g fructose, 10mg potassium polystyrene sulfonate and 30ml water were added to a 100ml hydrothermal kettle, and the reaction was sealed in an oven at 180°C for 12h. The material was taken out, washed and dried, and then calcined in an air atmosphere at 800° C. for 1 h to obtain porous carbon. Pass N 2 In the adsorption and 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, polyvinylidene dimethyl ammonium chloride and 50ml of water in a certain mass ratio with the carbon source into a 100ml hydrothermal kettle, and take it out after a period of hydrothermal reaction in an oven at a certain temperature After washing and drying, it is calcined in air atmosphere at a certain temperature for 1 hour to obtain porous carbon. The types, proportions and reaction conditions of the reaction materials are shown in Table 1. Pass N 2 In the adsorption and desorption experiment, 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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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] Supercapacitor is a new type of energy storage device that combines the power characteristics of the capacitor and the high energy storage performance of the 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 fields. It is worth mentioning that 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 problems of...

Claims

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Application Information

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IPC IPC(8): C01B31/02H01G11/24C01B32/15
Inventor 王勇巩玉同
Owner ZHEJIANG UNIV
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