A template-free preparation method of hierarchical porous activated carbon electrode material

A technology of hierarchically porous and activated carbon, which is applied to the template-free preparation of porous activated carbon materials and the preparation of electrode materials. looking for effects

Active Publication Date: 2018-10-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the pore size of MgO produced by calcination cannot be controlled, we cannot effectively control the pore size of activated carbon materials, making it difficult to solve the problem of optimizing the pore structure.

Method used

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  • A template-free preparation method of hierarchical porous activated carbon electrode material
  • A template-free preparation method of hierarchical porous activated carbon electrode material
  • A template-free preparation method of hierarchical porous activated carbon electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, 2 mg of commercial microporous activated carbon and 4 mg of potassium hydroxide were weighed, mixed and ground in a mortar, then calcined at a high temperature (at a temperature of 600 °C), and the calcined product was washed with dilute hydrochloric acid and deionized water. Until the pH value of the solution was 7, it was centrifuged again, and the resulting precipitate was dried at 70°C for 12 hours to obtain the first activated product, and then 1 mg of the first activated product and 3 mg Potassium hydroxide is fully mixed and ground in a mortar, and calcined at a high temperature (temperature is 600°C), and the product calcined at high temperature is washed with dilute hydrochloric acid and deionized water until the pH value of the solution is 7, and then centrifuged After treatment, the obtained precipitate was dried at 70° C. for 12 hours to obtain a hierarchical porous activated carbon electrode material.

[0025] The pore size distribution of the prepar...

Embodiment 2

[0027] First, 2 mg of commercial microporous activated carbon and 8 mg of potassium hydroxide were weighed, mixed and ground in a mortar, then calcined at a high temperature (at a temperature of 700 °C), and the calcined product was washed with dilute hydrochloric acid and deionized water. Until the pH value of the solution was 7, it was centrifuged again, and the resulting precipitate was dried at 50°C for 12 hours to obtain the first activated product, and then 1 mg of the first activated product and 4 mg Potassium hydroxide is fully mixed and ground in a mortar and then calcined at high temperature (temperature is 500°C). The product calcined at high temperature is washed with dilute hydrochloric acid and deionized water until the pH value of the solution is 7, and then it is centrifuged. , and the resulting precipitate was dried at 50°C for 8 hours to obtain a hierarchical porous activated carbon electrode material.

Embodiment 3

[0029] First, 2 mg of commercial microporous activated carbon and 6 mg of potassium hydroxide were weighed, mixed and ground in a mortar, and then calcined at a high temperature (at a temperature of 800 °C). The calcined product was washed with dilute hydrochloric acid and deionized water. Until the pH value of the solution was 7, it was then centrifuged, and the resulting precipitate was dried at 60°C for 8 hours to obtain the first activated product, and then 1 mg of the first activated product and 1 mg Potassium hydroxide is thoroughly mixed and ground in a mortar and then calcined at high temperature (at a temperature of 700°C). The product calcined at high temperature is washed with dilute hydrochloric acid and deionized water until the pH value of the solution is 7, and then centrifuged. , and the resulting precipitate was dried at 50° C. for 12 hours to obtain a hierarchical porous activated carbon electrode material.

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Abstract

The invention discloses a template-free preparation method of a hierarchical porous active carbon electrode material. The active carbon material prepared by the method has a microporous and mesoporous double structure. The method particularly comprises the following technical steps of: performing mixture, grinding and high temperature calcination on conventional micro active carbon and potassium hydroxide according to different proportions, performing the mixture, the grinding and the high temperature calcination on a product of the best proportion and potassium hydroxide according to different proportions for the second time, and finally performing treatment such as washing, centrifugation and drying on a calcined product to form the hierarchical porous active carbon material. When the porous active carbon material with the microporous-mesoporous double structure serves as a supercapacitor electrode material, the porous active carbon material shows good specific capacity and excellent rate capability. The preparation method has the advantages of novelty, simplicity in operation, low preparation cost and the like.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a template-free preparation method of a porous activated carbon material with a microporous-mesoporous double pore structure; it belongs to the field of new energy materials. Background technique [0002] In recent years, carbon-based materials (carbon nanoparticles, carbon nanotubes, graphene, etc.) have attracted extensive attention in the field of electrode materials for supercapacitors due to their unique advantages, especially activated carbon materials. Among them, the pore structure of activated carbon seriously affects the performance of supercapacitors, and the narrow micropore channels of traditional activated carbon materials lead to slow ion transport, especially at higher charge and discharge rates. Capacitance attenuation is serious. [0003] In order to improve the pore structure of activated carbon materials and further improve the electrochemical p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/36H01G11/24H01G11/32H01G11/86
CPCY02E60/13
Inventor 杨树华孙靖曹丙强
Owner UNIV OF JINAN
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