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Collecting electrode used in super capacitor and its surface treating method

A supercapacitor, surface treatment technology, applied in the direction of capacitor electrodes, hybrid capacitor collectors, capacitors, etc., can solve the problem of electrode material adhesion strength, thermal stability, corrosion resistance, electrical inertia are not very ideal, and cannot meet large-scale production , can not be effectively dealt with and other problems, to achieve uniform distribution, reduce internal resistance, improve the effect of bonding strength

Inactive Publication Date: 2008-05-07
NINGBO FUDA ELECTRIC APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have a certain effect on removing dust on the surface of the current collector, but if there is anti-corrosion oil or anti-sticking agent on the surface of the current collector, it cannot be effectively treated
In addition, the adhesive strength, thermal stability, corrosion resistance, electrical inertia and other aspects of electrode materials coated with most current collectors are not very ideal, and they are made by one-time molding, with large internal resistance and small specific capacitance, and cannot Meet mass production requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare the chromic acid mixture in the following proportions:

[0027] 4 kilograms of chromic acid (concentration 60%), 90 kilograms of concentrated sulfuric acid (concentration 80%), 6 kilograms of water, stir evenly.

[0028] The aluminum foil is subjected to surface corrosion treatment (20 m / min, treatment time 30 seconds) on the coating machine through an acid tank, then cleaned through a cleaning tank, finally dried in an oven, and wound up.

[0029] The resulting product is:

[0030] The thickness of the aluminum foil is 20±2μm, the width is 500±2mm, the length is 2000-3000m, and the thickness of one side of the roughness is 2.0μm. The surface is sponge-like when observed under a 20,000-fold electron microscope, and the average pore size of the corrosion holes is 0.1μm. at 1cm 2 There are 8.5-9 billion holes in the area, and the tensile strength is 1.9kg / cm.

Embodiment 2

[0032] Prepare the chromic acid mixture in the following proportions:

[0033] 5 kilograms of chromic acid (concentration 60%), 85 kilograms of concentrated sulfuric acid (concentration 80%), 10 kilograms of water, stir evenly.

[0034] The aluminum foil is subjected to surface corrosion treatment (20 m / min, treatment time 35 seconds) on the coating machine through an acid tank, then cleaned through a cleaning tank, finally dried in an oven, and wound up.

[0035] The resulting product is:

[0036] The thickness of the aluminum foil is 18±2μm, the width is 500±2mm, the length is 2000-3000m, and the thickness of one side of the roughness is 1.8μm. The surface is sponge-like when observed under a 20,000-fold electron microscope, and the average diameter of the corrosion holes is 0.08μm. at 1cm 2 There are 8.5-10 billion holes in the area, and the tensile strength is 1.6kg / cm.

Embodiment 3

[0038] Prepare the chromic acid mixture in the following proportions:

[0039] 4.4 kilograms of lithium chromate (concentration 60%), 88.3 kilograms of concentrated sulfuric acid (concentration 80%), 7.3 kilograms of water, stir evenly.

[0040] The aluminum foil is subjected to surface corrosion treatment (20 m / min, treatment time 30 seconds) on the coating machine through an acid tank, then cleaned through a cleaning tank, finally dried in an oven, and wound up.

[0041] The resulting product is:

[0042] The thickness of the aluminum foil is 23±2μm, the width is 500±2mm, and the length is 2000-3000m. The thickness of the corroded aluminum foil is 1-2μm, and the thickness of one side of the roughness is 2.3μm. The surface is sponge-like when observed under a 20,000-fold electron microscope. , the average pore diameter of corrosion holes is 0.12μm, at 1cm 2 There are 8.5-10 billion holes in the area, and the tensile strength is 2.4kg / cm.

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Abstract

The invention discloses a collector of super capacitor and the surface processing method, which is characterized in that a collector body film can be an aluminum film, a copper foil, a foam nickel film, a stainless steel film or punching nickel film; the purity of aluminum is over 99.9%; the thickness of the corrosion aluminum foil is 15 to 50 Mum; the roughness is 1.5 to 3.0 Mum; the collector body is spongy under 20000X electronic microscope; the average diameter of the corrosion hole is 0.05 to 0.2 Mum; 5 to 10 billion holes are arranged in the area of 1 cm2; the tensile strength is 1.0 to3.0 kg / cm. The invention has the advantages that chromic acid mixture is adopted for chemical treatment for the surface of the current collector; dust on the surface of aluminum foil of the current collector during storage and transportation can be removed; anti-septic oil and anti-sticking agent on the aluminum foil during machining process are also effectively removed; active functional groups are added, enabling even and consistent distribution of coated electrode material; the adhesion strength of the electrode film is improved; internal resistance of the electrode is reduced, the specificsurface area is increased; the collector is applicable to large scale production.

Description

1. Technical field [0001] The present invention relates to a collector electrode and its surface treatment method, more particularly to a collector electrode used in a supercapacitor and its surface treatment method 2. Technical background [0002] Research and development of new energy sources, implementation of energy conservation and consumption reduction, and improvement of environmental quality are important contents of the global energy development strategy. Supercapacitor is a super energy storage device with high power, fast charging / discharging, and long cycle life that has emerged in recent years. It has the dual functions of capacitor and battery. Its functional density is much higher than that of ordinary batteries, and its charging and discharging speed is much faster than that of ordinary batteries. Its energy density is much higher than that of ordinary electrolytic capacitors, and its energy storage is greater than that of ordinary capacitors. Compared with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/042H01G9/055H01G9/058H01G13/00H01M4/64H01M4/04C23F1/16H01G11/68H01G11/84
CPCY02E60/13Y02E60/12Y02E60/10
Inventor 田吉传徐来根杨晓明
Owner NINGBO FUDA ELECTRIC APPLIANCE
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