Method for preparing mesoporous carbon material for electrochemical capacitor

A capacitor and electrochemical technology, applied in the field of preparation of mesoporous carbon materials for electrochemical capacitors, can solve the problems of long time consumption and high energy consumption, and achieve the effects of reducing production costs, saving grinding costs, and saving the amount of activators

Active Publication Date: 2012-04-25
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the conventional activation method takes a long time and consumes a lot of energy

Method used

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  • Method for preparing mesoporous carbon material for electrochemical capacitor
  • Method for preparing mesoporous carbon material for electrochemical capacitor
  • Method for preparing mesoporous carbon material for electrochemical capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Mesoporous carbon MC ZnCl2-1-600-20 Concrete preparation process is as follows:

[0025] (1) Pretreatment of peanut shells: After washing the peanut shells cut into small pieces with ordinary water, wash them at 110 o C drying at constant temperature for 12 hours, the air-dried base moisture of the obtained peanut shells is 9.52%, the ash content is 1.30%, the volatile content is 68.34%, and the fixed carbon content is 20.84%. Put 20g of peanut shells into a beaker and add 200mL of 0.5M KOH solution , heating the beaker on a magnetic heating stirrer for 2 hours, washing the peanut shells with distilled water at 70-80°C until the pH value of the filtrate is 7, and drying the washed peanut shells at a constant temperature of 110°C for 12 hours to obtain pretreated peanut shells;

[0026](2) Preparation of mesoporous carbon: Measure 60mL of distilled water into a beaker, weigh 13.5g of zinc chloride solid and dissolve in the distilled water in the beaker, weigh...

Embodiment 2

[0028] Example 2: Mesoporous carbon MC ZnCl2-2-600-20 Concrete preparation process is as follows:

[0029] (1) Pretreatment of peanut shells: implemented in the same manner as step (1) in Example 1.

[0030] (2) Implement in the same manner as step (2) in Example 1, except that the zinc chloride solid weighed is 18 g; the peanut shell obtained in step (1) is weighed 9 g.

[0031] (3) According to the same method as step (3) in Example 1, the difference is that the obtained mesoporous carbon is marked as MC ZnCl2-2-600-20 .

Embodiment 3

[0032] Example 3: Mesoporous carbon MC ZnCl2-3-600-20 Concrete preparation process is as follows:

[0033] (1) Pretreatment of peanut shells: implemented in the same manner as step (1) in Example 1.

[0034] (2) Carry out the same method as step (2) in Example 1, except that the zinc chloride solid weighed is 20.25 g; and the peanut shell obtained in step (1) is weighed 6.75 g.

[0035] (3) According to the same method as step (3) in Example 1, the difference is that the obtained mesoporous carbon is marked as MC ZnCl2-3-600-20 .

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Abstract

The invention provides a method for preparing a mesoporous carbon material for an electrochemical capacitor, and belongs to the technical fields of carbon materials and microwave chemistry. In the method, peanut shells are taken as a carbon source, zinc chloride or phosphoric acid is taken as an activating agent, and the mesoporous carbon material is prepared by one step of activating the peanut shells through microwave-assisted heating; and the obtained mesoporous carbon material has the specific surface area of between 1,307 and 1,552m<2> / g, the total pore volume of between 0.67 and 1.83cm<3> / g, and the average pore size of between 2.06 and 5.02nm; non-micropore volume is 62.7 to 99.2 percent of the total pore volume; and the yield is 32.3 to 44.9 percent. The carbon source is a renewable agricultural waste, and has the characteristics of low price and high availability; the microwave heating has the advantages of uniformity, quickness and energy conservation; and the obtained mesoporous carbon serves as a material for the electrochemical capacitor, and has high stability and excellent comprehensive properties.

Description

technical field [0001] The invention belongs to the technical field of carbon materials and microwave chemistry, and in particular relates to a method for preparing mesoporous carbon materials for electrochemical capacitors. Background technique [0002] Mesoporous carbon has a high specific surface area, porosity and good physical and chemical properties, and has a wide range of applications in the fields of energy, chemical industry and environmental protection. Different application purposes have different requirements for the pore size of mesoporous carbon materials. With the improvement of people's requirements for mesoporous carbons, the development of cheap mesoporous carbons with adjustable pore diameters and pore volumes has attracted widespread attention. The selection of cheap raw materials and efficient preparation methods is the key to the low-cost preparation of mesoporous carbon materials. [0003] The raw materials for preparing mesoporous carbon materials m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12B09B3/00
CPCY02W30/20
Inventor 何孝军李如春郑明东韩久凤凌平华张小勇
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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