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Electrochemical corrosion preparation method of micropore battery copper foil and micropore copper foil of micropore battery

An electrochemical and copper foil technology, which is applied in the field of battery copper foil preparation, can solve problems affecting coating, slurry seepage, etc., and achieve the effects of solving adhesion, improving adhesion, and improving copper surface properties

Inactive Publication Date: 2018-10-02
산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the copper foil and copper foil they prepared must use a special battery automatic production line. The reason is that in the original battery automatic production line, when using this kind of copper foil or copper foil with a through hole diameter of 1mm, there will be slurry on the back side. Phenomenon that affects the coating on the other side

Method used

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  • Electrochemical corrosion preparation method of micropore battery copper foil and micropore copper foil of micropore battery
  • Electrochemical corrosion preparation method of micropore battery copper foil and micropore copper foil of micropore battery
  • Electrochemical corrosion preparation method of micropore battery copper foil and micropore copper foil of micropore battery

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Embodiment 1

[0027] A method for preparing a high-performance lithium battery microporous copper foil by electrochemical corrosion, which is carried out according to the following steps:

[0028] 1) Clean the surface of the rolled battery copper foil to remove the lubricant: the composition of the first cleaning solution is 10g / L NaOH, 10g / L NaOH 2 CO 3 , 40g / L of Na 3 PO 4 , pass the rolled copper foil through the first cleaning solution, and keep it in the first cleaning solution for 8s.

[0029] 2) Press the cleaned copper foil into the chemical etching solution: the composition of the chemical etching solution is: 1.5mol / L HCl, 1mol / LC 2 h 2 o 4 , 0.1mol / L NH 4 Cl, 1mol / L FeCl 3 , 0.1mol / L AgCl 2The corrosion tank is used as the cathode, the copper foil is used as the anode, and 48V DC is applied for corrosion. The residence time of the copper foil in the etchant is 45s. At this stage, ensure that the upper and lower surfaces of the copper foil are soaked in the corrosive solu...

Embodiment 2

[0036] 1) Clean the surface of the battery copper foil: there are attachments on the surface of the rolled battery copper foil, which have an adverse effect on the formation of holes in the copper foil, and the copper foil needs to be cleaned by the first cleaning solution. Described first cleaning liquid is made of 15g / L NaOH, 15g / LNa 2 CO 3 , 15g / L Na 3 PO 4 composition. Pass the rolled copper foil through the first cleaning solution, and keep it in the first cleaning solution for 7s.

[0037] 2) All the cleaned copper foils are immersed in the chemical corrosion solution, so that the corrosion solution flows on the upper and lower surfaces of the copper foil in a circular flow mode, so as to achieve uniform corrosion on the upper and lower surfaces. The corrosion tank is used as the cathode, the copper foil is used as the anode, and 6V DC is added for corrosion. The DC can also be set to a safe voltage such as 36V, 64V, and the corrosion time is 20s. The corrosion time ...

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Abstract

The invention discloses an electrochemical corrosion preparation method of a micropore battery copper foil and a micropore copper foil of the micropore battery and belongs to the technical field of battery copper foil preparation. According to the technical scheme, the electrochemical corrosion preparation method comprises the following steps: cleaning the surface of a rolled battery copper foil to remove a lubricant; dipping the cleaned battery copper foil in chemical corrosion liquid completely, wherein the chemical corrosion liquid is composed of 0.5-1.5 mol / L HCl, 0.5-2 mol / L C2H2O4, 0.1-0.5 mol / L NH4Cl, 0.1-1 mol / L FeCl3 and 0.1-0.5 mol / L AgCl2; taking an etching tank as the cathode and the battery copper foil as the anode, and externally applying 6-64 V DC for corrosion, wherein thestaying time of the battery copper foil in the corrosion liquid is 20-120 s; and cleaning the residual liquid on the surface of the corroded battery copper foil, and drying the battery copper foil. The electrochemical corrosion preparation method can be widely applied in the field of lithium battery micropore copper foil manufacture.

Description

technical field [0001] The invention discloses an electrochemical corrosion preparation method of microporous battery copper foil and the microporous copper foil, belonging to the technical field of battery copper foil preparation. Background technique [0002] New materials and clean energy are both key development directions at the national level. Lithium-ion batteries are currently the most widely used energy storage cells in energy storage technology. Improving the energy storage density of cells is the goal pursued by the world. The energy density of cells is The improvement mainly depends on the development and progress of its positive and negative electrode materials, but it is also related to the progress of the positive and negative electrode current collectors, positive and negative electrode binders, electrolytes and separators of lithium-ion batteries. [0003] The negative electrode of lithium ion battery is composed of copper foil and negative electrode slurry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/02C23G1/20C23G1/10
CPCC25F3/02C23G1/103C23G1/20
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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