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Perforated foil used for current collector and its making method

A manufacturing method and fluid collector technology, applied in the field of energy storage devices, can solve the problems of large aperture, low production efficiency, expensive laser processing and manufacturing costs, etc., and achieve the effect of simple process and low cost

Active Publication Date: 2014-01-22
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hole diameter of the punching process is relatively large, generally above 300 μm, and it is easy to leak the slurry when coating the electrode active material
Laser processing can produce perforated foils with smaller apertures, but laser processing is expensive and has low production efficiency
The electrolytic etching process is relatively complicated and not suitable for mass production

Method used

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  • Perforated foil used for current collector and its making method
  • Perforated foil used for current collector and its making method
  • Perforated foil used for current collector and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 is a perforated copper foil for a current collector.

[0045] The specific manufacturing process of this embodiment is as follows:

[0046] Step 1, surface pretreatment; perform surface pretreatment on the copper foil for current collector according to the following procedure:

[0047] i) Ultrasonic solvent cleaning: unwind, immerse the copper foil in a trichlorethylene solution for ultrasonic cleaning, the ultrasonic power is 60W, the cleaning time is 20 minutes, and the solvent temperature is 24°C; after cleaning, immerse the copper foil in absolute ethanol for 20 minutes, The temperature is 24°C, and the ultrasonic power is 60W. The purpose of ultrasonic solvent cleaning is to remove the contamination on the copper foil surface, improve the adhesion between the mask and the copper foil surface and the uniformity of etching.

[0048] ii) Surface roughening: In order to further improve the adhesion between the copper foil and the mask, the surface of the co...

Embodiment 2

[0055] This embodiment is a perforated copper foil for current collector.

[0056] The specific manufacturing process of this embodiment is as follows:

[0057] Step 1, surface pretreatment; perform surface pretreatment on the copper foil for current collector according to the following procedure:

[0058] i) Ultrasonic solvent cleaning: unwind, immerse the copper foil in a trichlorethylene solution for ultrasonic cleaning, the ultrasonic power is 60W, the cleaning time is 20 minutes, and the solvent temperature is 24°C; after cleaning, immerse the copper foil in absolute ethanol for 20 minutes, The temperature is 24°C, and the ultrasonic power is 60W. The purpose of ultrasonic solvent cleaning is to remove the contamination on the copper foil surface, improve the adhesion between the mask and the copper foil surface and the uniformity of etching.

[0059] ii) Surface roughening: In order to further improve the adhesion between the copper foil and the mask, the surface of th...

Embodiment 3

[0066] This embodiment is a perforated aluminum foil for current collector.

[0067] The specific manufacturing process of this embodiment is as follows:

[0068] Step 1, surface pretreatment; perform surface pretreatment on the aluminum foil for the current collector according to the following procedures:

[0069] i) Ultrasonic solvent cleaning: unwind the roll, immerse the aluminum foil in trichlorethylene solution for ultrasonic cleaning, the ultrasonic power is 60W, the cleaning time is 20 minutes, and the solvent temperature is 24°C; after cleaning, immerse in absolute ethanol for ultrasonic cleaning for 20 minutes, the temperature 24°C, ultrasonic power is 60W. The purpose of ultrasonic solvent cleaning is to remove the contamination on the surface of the aluminum foil, improve the adhesion between the mask and the surface of the aluminum foil and the uniformity of etching.

[0070] ii) Surface roughening: In order to further improve the adhesion between the aluminum f...

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Abstract

The invention relates to a making method of a perforated foil used for a current collector. The method includes: firstly employing a printing technology to print a figure on the surface of a metal foil used for a current collector, and then adopting a wet etching technology to etch the foil so as to make the perforated foil. With the characteristics of simplicity and low production cost, the making method is suitable for commercial batch production. The made perforated foil not only can be used for lithium ion capacitors, and also can be used in lithium ion batteries, super capacitors and other fields. In addition, the invention also relates to the perforated foil used for a current collector made by the method.

Description

technical field [0001] The invention relates to the technical field of energy storage devices such as lithium-ion batteries, lithium-ion capacitors or supercapacitors, and in particular to a perforated foil for a current collector and a manufacturing method thereof. Background technique [0002] With the development of society, people have higher and higher requirements for the energy density and power density of energy storage devices, and commonly used energy storage devices such as lithium-ion batteries and electric double-layer capacitors can no longer meet the demand. Lithium-ion capacitor is a new type of green energy storage device, which combines the advantages of lithium-ion battery and electric double layer capacitor. It has the characteristics of high power density, high energy density, good cycle performance, long service life, and miniaturization. Products, wind power generation, solar street lights, electric vehicles, etc. have broad application prospects. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/64H01G11/84
CPCH01G11/84H01M4/80Y02E60/10Y02E60/13
Inventor 徐启远姜冬冬赵祖珍徐永进朱永法
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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