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Method for manufacturing metallic absorbent charcoal

A technology of activated carbon and metal, which is applied to parts of fixed capacitors, electrical components, electrolytic capacitors, etc., can solve the problems of high raw material prices, complicated and harsh preparation processes, and source constraints, and achieve abundant sources, simple preparation processes, and well-developed pores Effect

Inactive Publication Date: 2008-08-20
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has a certain effect, it also has the problems of high raw material prices, restricted sources, and complicated and harsh preparation processes.

Method used

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  • Method for manufacturing metallic absorbent charcoal

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Effect test

Embodiment 1

[0033] Take 100g bituminous coal, 70gMn(NO 3 ) 2 Solution (50w%), 45g of coal tar, 0.5g of additives and an appropriate amount of water are mixed, kneaded and stirred, layered (φ2mm), and then dried at 80°C for 12h. Cut the dry strip into about 20mm long, carbonize at 600°C for 45 minutes, and then activate with water vapor at 850°C for 120 minutes, the BET specific surface area of ​​the obtained metal activated carbon is 890m 2 / g, the total pore volume is 1.28cm 3 / g, when the metal activated carbon is used as capacitor electrode material, its specific capacitance is 328F / g.

Embodiment 2

[0035] Take 100g bituminous coal, 140gMn(NO 3 ) 2 Solution (50%w), 45g of coal tar, 0.5g of additives and appropriate amount of water are mixed, kneaded and stirred, layered (φ2mm), and then dried at 80°C for 12 hours. Cut the dry strip into about 20mm long, carbonize at 600°C for 45 minutes, then activate with water vapor at 850°C for 120 minutes, the BET specific surface area of ​​the obtained metal activated carbon is 1130m 2 / g, the total pore volume is 1.16cm 3 / g, when the metal activated carbon is used as a capacitor electrode material, its specific capacitance is 301F / g.

Embodiment 3

[0037] Take 100g bituminous coal, 62.5gCu(NO 3 ) 2 ·3H 2 O (make a solution), mix 45g of coal tar, 0.5g of additives and an appropriate amount of water, knead and stir, layer (φ2mm), and then dry at 80°C for 12 hours. Cut the dry strip into about 20mm long, carbonize at 600°C for 45 minutes, and then activate with water vapor at 850°C for 120 minutes, the BET specific surface area of ​​the obtained metal activated carbon is 922m 2 / g, the total pore volume is 0.95cm 3 / g, when the metal activated carbon is used as capacitor electrode material, its specific capacitance is 236F / g.

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Abstract

The invention provides a preparation method for metal active carbon used in electrodes, which is characterized in that coal is used as raw material, metal compounds, binder and surfactant are added, uniformly mixed, layered and molded to get strip. After being dried, the strip is carbonized under certain temperature and activated with steam, carbon dioxide or the mixtures as activator under a certain temperature to get metal active carbon at last. The preparation method for electrode metal active carbon has the advantages of rich material resources and low price, and thus can be used to prepare metal active carbon with abundant pores, controllable pore structure, large quantity of mesopores, and double effects of double-layer capacitance and quasi-capacitance.

Description

technical field [0001] The invention relates to the field of activated carbon preparation, in particular to a method for preparing metallic activated carbon for capacitor electrodes. Background technique [0002] A supercapacitor (electrochemical capacitor) is an energy storage element between a battery and a conventional capacitor based on an electrochemical process at the electrode / electrolyte interface. Its capacity comes from electric double-layer capacitance and Faraday quasi-capacitance. It has the characteristics of high power density of ordinary capacitors and high energy density of batteries. It has excellent continuous and rapid charge and discharge performance, long cycle life, wide operating temperature range, maintenance-free, and environment Friendly and other advantages. Supercapacitors have broad application prospects in many fields, such as aerospace, military, industrial, civil fields, or used alone to adjust electrical loads, store electricity, or generat...

Claims

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Application Information

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IPC IPC(8): C01B31/08H01G9/042H01G9/058H01G4/008H01G11/34
Inventor 解强李兰廷郝丽娜
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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