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Stacked super condensor and its manufacturing method

A technology of supercapacitor and manufacturing method, applied in capacitor manufacturing, capacitors, electrolytic capacitors, etc., can solve the problems of low power density and energy density of supercapacitors, unsuitable for manufacturing large surface area electrodes, uncontrollable thickness of formed electrode films, etc. It is convenient for large-scale industrial production, good electrochemical performance, and convenient control of electrode forming.

Active Publication Date: 2004-10-20
深圳石墨烯创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common disadvantages of the mold molding method and the bonding molding method are the disadvantages of complex process, low yield, large electrode volume, and poor high-current charge and discharge performance. It is not suitable for the manufacture of electrodes with large surface areas, and is not conducive to large-scale production.
The disadvantage of the impregnation method is that the active material is easy to fall off from the electrode current collector, the thickness of the formed electrode film is uncontrollable and uneven, the power density and energy density of the manufactured supercapacitor are very low, the internal resistance is large, and the high current charge and discharge poor performance

Method used

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  • Stacked super condensor and its manufacturing method
  • Stacked super condensor and its manufacturing method
  • Stacked super condensor and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Example 1: Mix activated carbon with an average particle size of 10 microns, conductive carbon black, and polyvinylidene fluoride in a weight ratio of 80:15:5, then add an appropriate amount of nitrogen-methylpyrrolidone as a solvent, and stir for a certain period of time to obtain Uniform slurry with a certain viscosity, use a casting machine to evenly coat the mixed slurry on the nickel foam current collector, then stay in the drying oven at 85°C for 60 minutes, take it out and put it on the automatic temperature-controlled rolling mill Roll from low temperature to high temperature first, the lowest temperature is generally not less than 50°C, the setting of the highest temperature is 5°C higher than the melting point of the binder polymer, and the rolling gap is adjustable from 50 to 2000 microns . In order to prevent the electrode active material from adhering to the rollers of the rolling mill and enhance the adhesion of the carbonaceous active material to the curr...

Embodiment 2

[0048] Embodiment 2: Manufacture carbonaceous active material electrode and supercapacitor monomer with the method identical with embodiment 1. The difference is that the positive and negative current collectors 1 and 6 used in the manufactured supercapacitor monomer are both nickel foils, the cut electrode area is 100 square centimeters, the thickness is 240 microns, and the concentration of sodium sulfate is 2 mol / liter. The aqueous solution is used as the electrolyte, its rated working voltage is 1.1 volts, its Faraday capacity is 92 Faradays, its specific power density is 340 W / kg, its specific energy density is 2.3 Wh / kg, its discharge capacity remains above 97% after 10,000 charge and discharge cycles, and its electrode expansion rate is 7.2%.

Embodiment 3

[0049] Embodiment 3: Manufacture carbonaceous active material electrode and supercapacitor monomer with the method same as embodiment 1. The difference is that the positive electrode current collector 1 of the manufactured supercapacitor monomer is aluminum mesh, the negative electrode current collector 6 is copper mesh, the electrode area is 180 square centimeters, the thickness is 220 microns, and the concentration is 1 mol / liter. The propylene carbonate solution of tetraethyl tetrafluoroborate ammonium salt is used as the electrolyte, its rated operating voltage is 2.7 volts, its Faraday capacity is 89 methods, its specific power density is 320W / kg, its specific energy density is 3.6Wh / kg, and its charge and discharge cycle is 5 The thousand-time discharge capacity remains above 98%, and the electrode expansion rate is 7.8%.

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Abstract

The method of manufacturing laminated super capacitor includes such steps: coating mixed pulp prepared from carbon active material, conducting agent, cementing material, and solvent onto surface of metal body of collecting current by using flow casting machine or coating mould; carrying out rolling, drying and cutting operations on automatic temperature-controlled reduction roller mill so as to obtain electrode in carbon active material; single super capacitor is made after stacking bodies of collecting current of positive and negative electrode as well as porous isolation membranes, then adding electrolyte and sealed; cascaded and paralleled more single capacitor produces super capacitor with higher voltage and high capacity. The invented capacitor provides features of high power density, stable cycle performance and low expansivity of electrode.

Description

technical field [0001] The invention relates to a supercapacitor and a manufacturing method thereof, in particular to a supercapacitor using a carbonaceous active material electrode and a manufacturing method thereof. Background technique [0002] With the progress of society and the development of science and technology, more and more fields have an increasing demand for energy. Some electronic instruments and the automobile industry, which are closely related to people's daily life, require energy not only for conventional needs, but also for special requirements, such as electronic instruments such as integrated circuits and microcomputers, when the power supply is cut off instantly or the voltage drops occasionally When it is used, it is easy to cause wrong instructions, and even cause the stored information to disappear completely, which requires a backup power supply with the equipment to avoid the above-mentioned accidents. The newly developed dual-power and multi-po...

Claims

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Application Information

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IPC IPC(8): H01G9/00H01M10/00H01M14/00
CPCY02E60/13
Inventor 李宝华周鹏伟康飞宇
Owner 深圳石墨烯创新中心有限公司
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