Method for forming aqueous super capacitor

A supercapacitor and formation method technology, which is applied in the manufacture of capacitors, electrolytic capacitors, hybrid/electric double layer capacitors, etc., can solve the problems of easy hydrogen evolution and powder loss, long time consumption, poor formation effect, etc., achieve short formation cycle and improve production efficiency effect

Inactive Publication Date: 2010-02-24
NANJING SHUANGDENG SCI TECH DEV RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new water system supercapacitor formation method in view of the problems existing in the existing water system supercapacitor formation method, such as long time consumption, easy hydrogen evolution and powder loss during formation, poor formation effect and large internal resistance of the product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The 6000F water-based supercapacitor is manufactured according to the conventional method. Firstly, the paste is used to prepare positive and negative electrode slurries. The active materials of the positive and negative electrodes are nickel hydroxide and activated carbon. Graphite, sodium carboxymethyl cellulose, polytetrafluoroethylene and other additives are added to the formula. The positive and negative electrode slurries are evenly coated on the foamed nickel current collector, and after drying and sheet drying, they are cut into electrode pieces of specified size.

[0020] The positive and negative pole pieces are covered with polypropylene diaphragm and then stacked and stacked to form a supercapacitor monomer. The total mass of the positive and negative pole pieces and the diaphragm is 210g. The supercapacitor is connected to a vacuum system, the housing is evacuated to a negative pressure of -0.1Mpa, and then 105g of 6mol / L KOH electrolyte is inhaled through ...

Embodiment 2

[0027] The 6000F water-based supercapacitor is manufactured according to the conventional method. Firstly, the paste is used to prepare positive and negative electrode slurries. The active materials of the positive and negative electrodes are nickel hydroxide and activated carbon. Graphite, sodium carboxymethyl cellulose, polytetrafluoroethylene and other additives are added to the formula. The positive and negative electrode slurries are evenly coated on the foamed nickel current collector, and after drying and sheet drying, they are cut into electrode pieces of specified size.

[0028] The positive and negative pole pieces are covered with polypropylene diaphragm and then stacked and stacked to form a supercapacitor monomer. The total mass of the positive and negative pole pieces and the diaphragm is 210g. The supercapacitor is connected to a vacuum system, the housing is evacuated to a negative pressure of -0.05Mpa, and then 160g of 6mol / L KOH electrolyte is inhaled through...

Embodiment 3

[0034] The 25000F water-based supercapacitor is manufactured according to the conventional method. Firstly, the paste is used to prepare the positive and negative slurry. Graphite, sodium carboxymethyl cellulose, polytetrafluoroethylene and other additives are added to the formula. The positive and negative electrode slurries are evenly coated on the foamed nickel current collector, and after drying and sheet drying, they are cut into electrode pieces of specified size.

[0035]The positive and negative pole pieces are covered with polypropylene diaphragm and then stacked and stacked to form a supercapacitor monomer. The total mass of the positive and negative pole pieces and the diaphragm is 820g. The supercapacitor is connected to a vacuum system, the housing is evacuated to a negative pressure of -0.1Mpa, and then 820g of 6mol / L KOH electrolyte is inhaled through the negative pressure inside the housing. Then charge the supercapacitor with 0.4A current for 2 hours.

[003...

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Abstract

The invention provides a method for forming an aqueous super capacitor. In the method, quantitative electrolyte is added by a vacuum injection method, and the aqueous super capacitor is charged and discharged for activation through different current values in multiple stages. Therefore, the method effectively improves the powder dropping phenomena of pole pieces in the process of formation and enhances the product properties of current leakage and internal resistance of the super capacitor. Meanwhile, the method has the advantages of greatly shortening the forming period and improving the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a method for forming an aqueous supercapacitor. Background technique [0002] A supercapacitor is a new type of energy storage element between batteries and traditional capacitors. It has unique advantages such as large specific capacity, long cycle life, large specific power, and no pollution to the environment. It can be used in many fields, such as: solar energy storage, mobile communication devices, portable instruments and equipment, data memory storage systems, emergency backup power supplies, starting power supplies for fuel cells, and auxiliary power supplies for electric vehicles. [0003] According to the energy storage mechanism, supercapacitors can be divided into electric double layer capacitors, faraday pseudocapacitors and hybrid capacitors. Electrode materials for supercapacitors include carbon materials, transition metal oxides, and conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/155H01G9/058H01G11/84
CPCY02E60/13
Inventor 苏迎东佘沛亮张明王金同
Owner NANJING SHUANGDENG SCI TECH DEV RES INST
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