Production method for high-energy ratio super capacitance electrode material

A technology of supercapacitor electrodes and manufacturing methods, which is applied in the manufacture of hybrid/electric double layer capacitors, capacitors, electrolytic capacitors, etc., can solve the problem of low utilization of supercapacitors' effective holes, low utilization rate of BET specific surface area, and low specific capacity of electrode materials. and other problems, to achieve the effect of high unit capacitance, reduce equivalent internal resistance, and improve utilization efficiency

Active Publication Date: 2009-02-18
安徽国研新能电芯技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017]Conventional supercapacitor production usually adopts wet method, that is, conductive agents such as micropowder porous carbon and carbon black with high specific surface area and organic adhesive are used in water or organic solvent Mix the slurry and apply it on the metal collector to make an electrode; although this method is simple and feasible, due to the inhomogeneity of the microscopic pore structure of the porous carbon, in which large and medium pores account for the majority, coupled with poor electrical conductivity, etc., super The utilization ra

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The specific surface area of ​​a manufacturer in Shanghai is 3500m 2 Porous carbon 35g / g, ECB type average particle size 30~40nm, high conductivity carbon black 65g, Japan Mitsubishi Corporation particle size about 1mm powdered expanded polytetrafluoroethylene 2g. First, the porous carbon raw material and the high-conductivity carbon black are ground for 2 hours with an agate grinder, so that the porous carbon and the conductive agent are uniformly compounded to form uniform composite particles with a particle size of about 0.5 μm. Then mix it with the above-mentioned polytetrafluoroethylene powder, and grind it with an agate grinder for 120 minutes to form a blade-shaped uniform composite electrode material. The average particle size of the electrode material is 8 mm. Thickness 0.1 ~ 1mm. The obtained leaf-shaped porous carbon / conductive agent / polytetrafluoroethylene uniform composite electrode material is then subjected to repeated high-energy rolling by a 100MPa hi...

Embodiment 2

[0037] The specific surface area of ​​a certain manufacturer in Henan used is 2300m 2 Porous carbon 65g / g, ECB type average particle size 30~40nm high conductive carbon black 35g, Japan Mitsubishi Corporation particle size about 0.2mm powdered expanded polytetrafluoroethylene 8g. First, the porous carbon raw material and the high-conductivity carbon black are ground for 10 minutes with a planetary ball mill, so that the porous carbon and the conductive agent are uniformly compounded to form uniform composite particles with a particle size of about 0.5 μm. Then mix it with the above-mentioned polytetrafluoroethylene powder, and grind it with a planetary ball mill for 60 minutes to form a granular uniform composite electrode material. The average particle size of the electrode material is 0.5mm. The obtained uniform composite electrode material of granular porous carbon / conductive agent / polytetrafluoroethylene is then subjected to repeated high-energy rolling by a 500MPa high-e...

Embodiment 3

[0039] The specific surface area produced by a manufacturer in Henan is 1200m 2 Porous carbon 95g / g, ECB type average particle size 30-40nm, high-conductivity carbon black 5g, Japan Mitsubishi Corporation particle size 0.6mm powdered expanded polytetrafluoroethylene 15g. First, the porous carbon raw material and the high-conductivity carbon black are ground for 50 minutes by a stirring ball mill, so that the porous carbon and the conductive agent are uniformly compounded to form uniform composite particles with a particle size of about 0.5 μm. Then mix it with the above-mentioned polytetrafluoroethylene powder, and grind it with an agate grinder for 120 minutes to form a blade-shaped uniform composite electrode material. The average particle size of the electrode material is 10mm. Thickness 0.1 ~ 1mm. The obtained leaf-shaped porous carbon / conductive agent / polytetrafluoroethylene homogeneous composite electrode material is then subjected to repeated high-energy rolling by a ...

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Abstract

The invention relates to a method for manufacturing super capacitor electrode materials with high energy ratio, belonging to energy material technology and related field. The invention uses mechanical chemical treatment means to prepare porous carbon/electric conduction agent/polytetrafluoroethylene composite electrode materials. The prepared materials can evenly compound porous carbon/carbon black/polytetrafluoroethylene to form composite electrode materials composed of nanoes, thereby adjusting pore size of the porous carbon and improving utilization efficiency of the carbon pore; when preparing the super capacitor electrode using the materials, because the carbon black and the polytetrafluoroethylene are evenly dispersed in the porous carbon base by the mechanical chemical treatment, the size and the distribution of the pore diameter of the carbon pore are changed, so that the electrode has higher unit capacity, on the other hand, the carbon framework can also provide a good electric conduction channel for the carbon black corpuscules dispersed therein, equivalent internal resistance of the capacitor is reduced, so the capacitor has higher power and energy density.

Description

technical field [0001] The invention relates to a manufacturing method of a high energy ratio supercapacitor electrode material. Specifically, it relates to a preparation method of using dry mechanical force to physically and chemically treat porous carbon / conductive agent / polytetrafluoroethylene composite electrode material. Background technique [0002] Supercapacitors (supercapacitors), also known as electrochemical capacitors (electrochemical capacitors), electric double layer capacitors, (yellow) gold capacitors, energy storage capacitors or farad capacitors, are new types of power electronics that have emerged with breakthroughs in material science in recent years. components. It has high specific power and long cycle life, can charge and discharge instantaneously with large current, and also has the characteristics of safety, reliability and wide application range, so it has unique application advantages in many occasions. Supercapacitors can be used as a backup pow...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/048H01G9/058H01G11/86
Inventor 米国民
Owner 安徽国研新能电芯技术有限公司
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