A preparation method of ultra-thin double-sided optoelectronic copper foil and the prepared copper foil

An optoelectronic and electrolytic copper foil technology, applied in electroforming, electrolytic process, etc., can solve the problems of unstable production process control, uneven thickness of copper foil, low yield, etc., and achieves smoothness and bright, uniform thickness, surface high tension effect

Active Publication Date: 2019-03-29
ANHUI TONGGUAN COPPER FOIL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention develops a production process of ultra-thin (for example, thickness 6 μm) double-sided optoelectronic copper foil, which solves the problem of unstable control of the traditional 6 μm ultra-thin double-sided optoelectronic copper foil production process, uneven thickness of copper foil, edge tearing, Problems of wrinkles and low yield

Method used

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  • A preparation method of ultra-thin double-sided optoelectronic copper foil and the prepared copper foil

Examples

Experimental program
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Effect test

Embodiment 1

[0029] see figure 1 , The preparation of the ultra-thin double-sided optoelectronic copper foil provided by the first embodiment of the present invention, that is, the manufacturing method of the 6 μm ultra-thin double-sided optoelectronic copper foil, comprises the following steps.

[0030] Inject the prepared additive into the electrolyzer liquid inlet pipe through the metering pump at 7.5L / h, fully mix with the electrolyte in the electrolyte preparation system during the fluid transportation process, and then enter the electrolyzer;

[0031] The flow rate of the electrolyte is 40-60m 3 / h, after the additive solution is mixed with the electrolyte and enters the electrolytic cell, at 4000~5000A / m 2 Electrolyzed for 60 seconds under the current density of the electrolytic solution, under the action of the electric field, the anions move to the anode, and the cations move to the cathode roller of the electrolytic cell, and electrochemical deposition is performed on the surfac...

Embodiment 2

[0037] Referring to the production method of Example 1, the copper foil product was prepared. The temperature of the electrolyte was 50-55° C., and the concentrations of the components were as follows: copper ion concentration 85 g / L, sulfuric acid concentration 170 g / L, and chloride ion concentration 0.03 g / L , the electrolyte flow rate is 40-60m 3 / h, the additive flow rate is 7.0L / h, and the formula of additive solution is: 2.0g / L alkylphenol polyoxyethylene ether sulfonate sodium (octylphenol polyoxyethylene ether sodium sulfonate), 2.0g / L 1,3-Tetrahydrothiazol-2-one, 1.5g / L collagen.

[0038] The rough surface of the lithium battery copper foil prepared in this example is mirror-like like the smooth surface, and the surface is smooth and wrinkle-free. After testing, the crystallization of the copper foil grains is a fine layered structure, and the thickness of the copper foil is 5.9-7.1um. The surface roughness Rz of the rough surface is 1.56um, and the tensile strength ...

Embodiment 3

[0040] Referring to the production method of Example 1, the copper foil product was prepared. The temperature of the electrolyte was 50-55°C, and the concentration of each material component was: copper ion concentration 75g / L, sulfuric acid concentration 165g / L, chloride ion concentration 0.03g / L , the electrolyte flow rate is 40-60m 3 / h, the flow rate of the additive is 8.0L / h, and the formula of the additive solution is: 1.0g / L alkylphenol polyoxyethylene sodium sulfonate (sodium nonylphenol polyoxyethylene ether sulfonate), 1.0g / L 1 , 3-tetrahydrothiazol-2-one, 0.5g / L collagen.

[0041] The rough surface of the ultra-thin double-sided optoelectronic copper foil prepared in this example is mirror-like like the smooth surface, and the surface is smooth and wrinkle-free. After testing, the crystallization of the copper foil grains is a fine layered structure, and the thickness of the copper foil is 5.9 ~7.1um, rough surface roughness Rz is 1.43um, tensile strength is 45.6Kg...

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Abstract

The invention relates to a preparation method of an ultra-thin double-sided photoelectronic copper foil and the prepared copper foil. The method comprises the following steps of: adding alkylphenol polyoxyethylene ether sodium sulfonate, 1,3-thiazolidine-2-one and collagen in deionized water and dissolving to obtain an additive solution for ultra-thin copper foil production; under the condition of a copper sulphate electrolyte at a temperature of 20-90 DEG C, adding 5.0-10.0L of the additive solution in per cubic metre of the electrolyte per hour, uniformly stirring and then enabling the electrolyte to enter an electrolytic bath; and electrolysing the electrolyte in the electrolytic bath under an electrolytic current density of 2000-6000A / m<2>, and carrying out an electrochemical reaction to generate the ultra-thin double-sided photoelectronic copper foil. The ultra-thin double-sided photoelectronic copper foil manufactured by the process disclosed by the invention has the following performance: the thickness is small and uniform, the roughness of a rough surface is moderate and uniform, the two sides of the copper foil are smooth and bright, the surface tension of the copper foil is high, the adhesion force of lithium-ion negative electrode active materials can be effectively increased, the electric capacity and charge-discharge times of a battery are increased, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to a preparation method of ultra-thin double-sided optoelectronic copper foil and the prepared copper foil. Background technique [0002] Lithium-ion secondary battery is a green and clean energy that is vigorously developed and advocated in the world. With the development of power supply technology, the production and use of lithium-ion secondary battery is increasing day by day. Double-sided light ultra-thin electrolytic copper foil is the key material for the negative electrode of high-quality lithium-ion secondary batteries. It affects the manufacturing process and comprehensive performance of lithium batteries. In recent years, with the rapid development of domestic new energy vehicles, lithium-ion batteries, as the power source of vehicles, are developing in the direction of smaller volume and larger capacity. Electronic copper foil is used as the negative electrode carrier and current collector of lithium-ion batteries. U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D1/04C25D3/38
CPCC25D1/04C25D3/38
Inventor 丁士启甘国庆陆冰沪于君杰王同贾金涛李大双吴斌朱勇李广胜
Owner ANHUI TONGGUAN COPPER FOIL
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