Copper foil manufacturing process and negative current collector

A manufacturing process and technology of copper foil, which is applied in the field of copper foil, can solve problems such as unstable manufacturing process, and achieve the effects of improving cycle performance, improving adhesion, and enhancing resistance

Active Publication Date: 2019-06-28
HUBEI ZHONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The market is increasingly demanding ultra-thin electrolytic copper foil. The domestic manufacturing process is unstable and there are still many technical difficulties. Therefore, it is very urgent to develop a stable and efficient ultra-thin electrolytic copper foil production process suitable for large-scale industrial production. and necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A manufacturing process of copper foil, comprising the steps of:

[0055] (1) Raise the temperature of the electrolyte solution to 55°C;

[0056] (2) Immerse the iridium-coated titanium anode and titanium cathode in the electrolyte solution, and add 1.5 parts by weight of additives to 100 parts by weight of the electrolyte;

[0057] (3) Perform an electrochemical reaction, deposit a copper layer on the titanium cathode, and add 1.5 parts by weight of additives every 1 hour;

[0058] (4) The copper layer is peeled off from the titanium cathode, washed with water and dried to obtain the copper foil;

[0059] Wherein, the solvent of the additive is water, and the additive includes the following concentrations of components:

[0060] Gelatin 2mg / L

[0061] Polyethylene glycol 3mg / L

[0062] Sodium Polydithiodipropane Sulfonate 2mg / L

[0063] Hydroxyethylcellulose 1.5mg / L

[0064]Triethanolamine 1.3mg / L

[0065] Polyacrylamide 1.1mg / L.

[0066] The thickness of the c...

Embodiment 2

[0070] A manufacturing process of copper foil, comprising the steps of:

[0071] (1) Raise the temperature of the electrolyte solution to 50°C;

[0072] (2) immerse the iridium-coated titanium anode and titanium cathode in the electrolyte solution, and add 1 weight part of the additive to 100 weight parts of the electrolyte;

[0073] (3) Perform an electrochemical reaction, deposit a copper layer on the titanium cathode, and add 1 weight part of additive every 1 hour;

[0074] (4) The copper layer is peeled off from the titanium cathode, washed with water and dried to obtain the copper foil;

[0075] Wherein, the solvent of the additive is water, and the additive includes the following concentrations of components:

[0076] Gelatin 3mg / L

[0077] Polyethylene glycol 4mg / L

[0078] Sodium Polydithiodipropane Sulfonate 3mg / L

[0079] Hydroxyethyl Cellulose 2mg / L

[0080] Triethanolamine 1.5mg / L

[0081] Polyacrylamide 1.2mg / L.

[0082] Wherein, the copper content of the ...

Embodiment 3

[0085] A manufacturing process of copper foil, comprising the steps of:

[0086] (1) Raise the temperature of the electrolyte solution to 60°C;

[0087] (2) Immerse the iridium-coated titanium anode and titanium cathode in the electrolyte solution, and add 2 parts by weight of additives to 100 parts by weight of the electrolyte;

[0088] (3) Perform an electrochemical reaction, deposit a copper layer on the titanium cathode, and add 2 parts by weight of additives every 1 hour;

[0089] (4) The copper layer is peeled off from the titanium cathode, washed with water and dried to obtain the copper foil;

[0090] Wherein, the solvent of the additive is water, and the additive includes the following concentrations of components:

[0091] Gelatin 1mg / L

[0092] Polyethylene glycol 2mg / L

[0093] Sodium polydithiodipropane sulfonate 1mg / L

[0094] Hydroxyethylcellulose 1mg / L

[0095] Triethanolamine 1mg / L

[0096] Polyacrylamide 1mg / L.

[0097] Wherein, the copper content of ...

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Abstract

The invention relates to the technical field of copper foils, in particular to a copper foil manufacturing process and a negative current collector. The manufacturing process comprises the following steps: (1) heating electrolyte solution; (2) adding an additive into the electrolyte; (3) carrying out electrochemical reaction; (4) stripping the copper layer from a titanium cathode. In the additive,gelatin plays an adsorption role and promotes the deposition of copper on the cathode; polyethylene glycol and hydroxyethyl cellulose are used as a surfactant combination, so that the current efficiency can be improved, and the particle size distribution range of copper is narrowed; triethanolamine and polyacrylamide can be adsorbed at the cathode, have a stronger cathode polarization effect, andcan enhance the inhibition effect of a high-current density region during copper deposition in cooperation with SPS (Sodium Polydithiodipropyl Sulfonate). Under the action of the additive, the prepared copper foil and the negative electrode slurry layer have good cohesiveness, and the cycle performance of the lithium battery can be improved.

Description

technical field [0001] The invention relates to the technical field of copper foil, in particular to a manufacturing process of copper foil and a negative electrode current collector. Background technique [0002] As a functional basic raw material in the electronics manufacturing industry, electrolytic copper foil has the reputation of "neural network". It is mainly used in the production of copper clad laminates and printed circuit boards. With the development of various electronic communication devices in a smaller and smaller direction and the printed circuit board (PCB) in the direction of being thin, dense and flat with high density interconnection With the development, the copper foil used has put forward high requirements for extremely thin and good performance. Ultra-thin electrolytic copper foil is used as the functional basic raw material of lithium-ion batteries. Under the current technical conditions, its potential, conductivity and support functions are not re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/04H01M10/0525C25D1/04
CPCY02E60/10
Inventor 汪汉平张干成文孟平曾潮彭硕
Owner HUBEI ZHONGYI TECH
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