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Atmospheric quick preparing method for carbon gas gel electrode material for super grade capacitor

A supercapacitor, carbon aerogel technology, applied in capacitor electrodes, electrode manufacturing, capacitor parts and other directions, can solve the problems of no supercapacitor value, no supercapacitor research, long drying time, etc., to save the solvent The effect of exchanging processing steps, shortening the preparation cycle, and high compaction density

Inactive Publication Date: 2007-10-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it takes a long time to form a gel and it also takes a long time to dry
[0006] Electrode materials for supercapacitors have special requirements for carbon aerogels. There is no research on supercapacitors in the above-mentioned literature, and the value of specific capacitance, which is an important parameter of supercapacitors, is not given.

Method used

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  • Atmospheric quick preparing method for carbon gas gel electrode material for super grade capacitor
  • Atmospheric quick preparing method for carbon gas gel electrode material for super grade capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0032] According to the molar ratio R / F of resorcinol and formaldehyde is 0.5, the molar ratio R / C of resorcinol and lactic acid as an additive is 0.2, and the mass ratio of resorcinol and deionized water is 0.2. , Dissolve resorcinol in deionized water, then add additive lactic acid, then add formaldehyde solution, and mix well. Put it in a sealed reactor with a constant temperature of 90°C and complete the gelation process in 0.5 hours to become a hydrogel. Under the action of ammonia gas, the temperature was raised to 850° C., and the temperature was kept constant for 1.5 hours to complete the preparation of carbon airgel.

[0033] The morphology of the prepared carbon airgel is shown in Fig. 1 and Fig. 2 . Figure 1 is a field-effect scanning electron microscope (FESEM) image of the carbon airgel structure with a magnification of 10,000 times, from which it can be seen that evenly distributed interconnected microspheres and a large number of holes provide channels for the ...

Embodiment 2

[0036] According to the molar ratio R / F of resorcinol and formaldehyde is 0.5, the molar ratio R / C of resorcinol and the malonic acid as additive is 10, the mass ratio of resorcinol and deionized water is 0.2 For proportioning, dissolve resorcinol in deionized water, then add the additive malonic acid, then add formaldehyde solution, and mix well. Put it in a sealed reactor with a constant temperature of 90°C and complete the gelation process in 3 hours to become a hydrogel. Under the action of ammonia gas, the temperature was raised to 900°C and kept at a constant temperature for 1.5 hours.

[0037] According to the test, the compacted density of the prepared carbon aerogel is 0.51g / cm 3 , 90% of the pores are below 5nm, the average pore diameter is 2.5nm, and the specific surface area is 971m 2 / g, in 1mol / L of H 2 SO 4 In the electrolyte, the specific capacitance of the cyclic voltammetry test at a scanning speed of 50mv / s is 246F / g, and the specific capacitance of the ...

Embodiment 3

[0039] According to the mol ratio R / F of resorcinol and formaldehyde is 0.3, the mass ratio R / C of resorcinol and the piperazine citrate as additive is 400, the mass ratio of resorcinol and deionized water is For a ratio of 0.2, take resorcinol and dissolve it in deionized water, then add the additive piperazine citrate, then add formaldehyde solution, and mix well. Put it in a sealed reactor with a constant temperature of 85°C and complete the gelation process in 4 hours to become a hydrogel. Under the action of ammonia gas, the temperature was raised to 1100°C, and the temperature was kept constant for 1 hour.

[0040] According to the test, the compacted density of the prepared carbon aerogel is 0.35g / cm 3 , the specific surface area is 767m 2 / g, in 1mol / L of H 2 SO 4 In the electrolyte, the specific capacitance of the cyclic voltammetry test at a scanning speed of 50mv / s is 196F / g, and the specific capacitance of the cyclic voltammetry test at a scanning speed of 2mv / ...

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Abstract

Characters of the preparation method are that RF hydrogel is prepared through gelatinization procedure by using resorcin and formaldehyde as reactant as well as by using polyacid in fattygroup or hydroxy of polyacid in fattygroup, or amido substitutional derivative, or admixture of above substances as additive; aerogel of charcoal of electrode material for super capacitor is obtained through drying and charring procedures under action of ammonia, or nitrogen and normal pressure. The invention reduces requirement and condition of posttreatment for preparing aerogel of charcoal, eliminates step for replacing solvent and supercritical dryness so as to shorten gelatinating time. The invention simplifies preparation procedure and method, and obtains electrode material in high performance.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor electrode material, more specifically a preparation method of a carbon airgel supercapacitor electrode material. Background of the invention [0002] Supercapacitor is a new type of power electronic components. It overcomes the disadvantages of low specific energy of ordinary capacitors, and also overcomes the disadvantages of low specific power of batteries and the inability to discharge large currents. It is safe and reliable, has a wide range of applications, and is environmentally friendly and does not produce pollution. It is a promising future. Electronic Components. In recent years, supercapacitors have developed rapidly, and have extremely important and broad application prospects in many fields such as information technology, electric vehicles, aerospace and defense technology. [0003] Electrode materials are the key to supercapacitors. The sp...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01M4/04H01M14/00
CPCY02E60/13Y02E60/10
Inventor 李学良韩昌隆史成武苏涛陈祥迎
Owner HEFEI UNIV OF TECH
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