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Method for making electrode of ultra-capacitor

A technology of supercapacitor and manufacturing method, applied in the field of electronics, can solve the problems of low bonding strength between collector and polarizer, low bonding strength of polarizer, etc., and achieve easy continuous production, high mechanical strength, high mechanical strength, etc. weak effect

Inactive Publication Date: 2009-08-19
锦州凯美能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the current supercapacitor electrode and its production technology, the present invention provides a method for manufacturing a supercapacitor electrode, which solves the problems of low bonding strength between the collector electrode and the polarized electrode, and small internal bonding strength of the polarized electrode.

Method used

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  • Method for making electrode of ultra-capacitor
  • Method for making electrode of ultra-capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The purity of aluminum is more than 99.9%, and the copper content is less than 0.01%, and the AC double-sided corrosion is carried out to obtain a corroded aluminum foil with a thickness of 20 μm and a roughness of 2.0 μm on one side. The surface composition is observed under a 20,000-fold electron microscope. Sponge, the average pore size of corrosion holes is 0.1μm, within 1cm 2 There are 8 billion holes in the area, and the tensile strength is 1.7kg / cm, which is used as a collector.

[0026] 5 parts by weight of the material of general formula (I) (R 1 for -CH 2 CH 3 , R 2 for-C 7 h 15 ), 5 parts by weight of polytetrafluoroethylene were dissolved in methyl ethyl ketone respectively, adding 80 parts by weight of activated carbon powder and 10 parts by weight of carbon black to form a slurry with a solid content of 16%, coated on both sides of the collector, and dried at 120 ° C for 60 minutes Pressed into a thickness of 100 μm, cut into two strip electrodes wit...

Embodiment 2I

[0032] 4.5 parts by weight of the material of general formula (I) (R 1 for -CH 2 CH 3 , R 2 for-C 7 h 15 ), 5.5 parts by weight of polytetrafluoroethylene are dissolved in methyl ethyl ketone respectively, and others are the same as Example 1.

[0033]As in Example 1, the charge-discharge cycle test was carried out at an ambient temperature of 45°C and a current of 10A from 2.5V to 1.25V. The capacity retention rate was 85% after 20,000 cycles. In addition, separate the aluminum foil and the polarized electrode with a knife, leaving a large amount of electrode material on the side of the aluminum foil.

Embodiment 3

[0035] 3.5 parts by weight of the material of general formula (I) (R 1 for -CH 2 CH 3 , R 2 for-C 7 h 15 ), 6.5 parts by weight of polytetrafluoroethylene are dissolved in methyl ethyl ketone respectively, and others are the same as Example 1. As in Example 1, the charge-discharge cycle test was carried out at an ambient temperature of 45°C and a current of 10A from 2.5V to 1.25V. The capacity retention rate was 80% after 20,000 cycles. Separate the aluminum foil and the polarized electrode with an external knife, and a large amount of electrode material remains on the side of the aluminum foil.

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Abstract

The invention relates to super capacitor electrode manufacturing method. It includes the following steps: processing alternating current two sides corroding for metal collector; dissolving compound bonding material in solvent; dispersing carbon material powder and conducting material to make slurry with 10-25% solids volume content; coating it at collector surface; drying; pressing its thickness to 60-150um; uniting the polarization pole and collector as a whole to form band electrode; cutting into two parts with same size; riveting leading wire; interlining electrode separating film with 30-80um thickness; winding to wick; vacuum drying for 8-18h. The produced electrode has the advantages of soft, large mechanical strength, easy continual production whose final thin can be 20um.

Description

technical field [0001] The invention belongs to the technical field of electronics, relates to supercapacitors, and in particular to a method for manufacturing supercapacitor electrodes. Background technique [0002] The principle of a supercapacitor is to form an electric double layer at the interface between the electrode and the electrolyte to accumulate charge. In order to increase the capacity density, the electrode should use active materials such as activated carbon, carbon fiber, carbon black, carbon nanotubes, metal oxides, and conductive polymers with high specific surface area. In order to make the electrode charge and discharge efficiently, a low-impedance coating such as metal and graphite is bonded to the collector. The collector is generally made of high-purity aluminum, stainless steel, nickel, etc. that are resistant to electrochemical corrosion. The electrolyte includes an aqueous electrolyte and an organic electrolyte. The organic electrolyte has a high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/04H01G9/00H01G13/00H01M4/04
CPCY02E60/13
Inventor 李文生姚建勋蔡丹武智惠
Owner 锦州凯美能源有限公司