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Method for preparing multilevel pore carbon electrode material of super capacitor

A technology for supercapacitors and electrode materials, which is applied in the manufacture of capacitors, hybrid/electric double-layer capacitors, electrolytic capacitors, etc., and can solve problems such as low specific power, lack of micropores, and small specific capacitance values

Inactive Publication Date: 2010-07-14
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these carbon materials lack micropores, so the specific capacitance value is small and the specific power is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Prepare 146 g of a mixed solution of alcohol and water with a mass ratio of 10:9, add 25 g of Pluronic F127 and 25 grams of phloroglucinol into the mixed solution, and stir until completely dissolved. Then, 1.6mL of 37wt% concentrated hydrochloric acid was added to the solution, and electromagnetically stirred until the solution turned pink. At this point, 26g of 37% formaldehyde was added to the solution, and after stirring for 5 hours, a phenolic resin solid was formed at the bottom of the solution. After the phenolic resin was aged in the solution for 12 hours, it was taken out of the solution and aged at 100°C for 12 hours. The aged phenolic resin is carbonized at 850° C. for 1-4 hours to obtain the mesoporous carbon material. Crush the carbonized product to below 50 mesh, mix it with KOH at a mass ratio of 1:2, and then activate it at 800°C under the protection of nitrogen. The activated product is fully washed with deionized water and dried to obtain a microporo...

Embodiment 2

[0016] Prepare 146 g of a mixed solution of alcohol and water with a mass ratio of 10:9, add 25 g of Pluronic P123 and 25 grams of resorcinol into the mixed solution, and stir until completely dissolved. Then, 1.6mL of 37wt% concentrated hydrochloric acid was added to the solution, and electromagnetically stirred until the solution turned pink. At this point, 26g of 37% formaldehyde was added to the solution, and after stirring for 5 hours, a phenolic resin solid was formed at the bottom of the solution. After the phenolic resin was aged in the solution for 12 hours, it was taken out of the solution and aged at 100°C for 12 hours. The aged phenolic resin is carbonized at 850° C. for 1-4 hours to obtain the mesoporous carbon material. Crush the carbonized product to below 50 mesh, mix it with KOH at a mass ratio of 1:4, and then activate it at 900°C under the protection of nitrogen. The activated product is fully washed with deionized water and dried to obtain a microporous-m...

Embodiment 3

[0018] Prepare 146 g of a mixed solution of alcohol and water with a mass ratio of 10:9, add 25 g of Pluronic P123 and 25 grams of resorcinol into the mixed solution, and stir until completely dissolved. Then, 1.6mL of 37wt% concentrated hydrochloric acid was added to the solution, and electromagnetically stirred until the solution turned pink. At this point, 26g of 37% formaldehyde was added to the solution, and after stirring for 5 hours, a phenolic resin solid was formed at the bottom of the solution. After the phenolic resin was aged in the solution for 12 hours, it was taken out of the solution and aged at 100°C for 12 hours. The aged phenolic resin is carbonized at 850° C. for 1-4 hours to obtain the mesoporous carbon material. Crush the carbonized product to below 50 mesh, mix it with NaOH at a mass ratio of 1:2, and activate it at 900°C under nitrogen protection. The activated product is fully washed with deionized water and dried to obtain a microporous-mesoporous h...

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Abstract

The invention provides a method for preparing a multilevel pore carbon electrode material of a super capacitor, comprising the following steps: (1) preparing the mixing solution of ethyl alcohol and water, adding a surfactant and a phenol compound into the mixture, stirring until the mixture is dissolved, adding concentrated hydrochloric acid into the solution, stirring until the solution is pink, then adding methanal, stirring to generate solid phenolic resin at the bottom of the solution, aging the phenolic resin in the solution, taking out, and then aging at 100 DEG C; (2) carbonizing aged phenolic resin under the protection of nitrogen at 850 DEG C to obtain a mesoporous carbon material; (3) smashing the mesoporous carbon material to less than 50 meshes, and then activating by an activating agent under the protection of nitrogen; and (4) washing the activated product by deionized water and drying to obtain the microporous-mesoporus multilevel pore carbon electrode material. In the invention, mesoporus carbon with even pore size distribution is prepared firstly, and then micropores are produced on the pore wall of the mesoporus carbon in the activation process to obtain the multilevel pore carbon electrode material with directly communicated mircropores and mesopores.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor electrode material, in particular to a preparation method of a hierarchical porous carbon electrode material. Background technique [0002] Supercapacitor is another new type of energy storage device with great potential for wide application after lithium-ion batteries. It not only has the high specific power and high cycle characteristics of conventional capacitors, but also has the characteristics of high energy storage of batteries. Therefore, it can meet the needs of both high specific power and high specific energy. Compared with the secondary battery, it has the characteristics of small leakage current, simple charge and discharge, high specific power and long cycle life, so it can form a composite power system with the secondary battery to meet the needs of the car when starting, accelerating, and climbing. high power requirements. The energy storage mechanism of supercapacitors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01G9/058H01G11/86
CPCY02E60/13
Inventor 邢伟禚淑萍周晋司维江高秀丽黄丛聪
Owner SHANDONG UNIV OF TECH
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