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Electrochemical thermal corrosion preparation method and microporous copper foil of a kind of microporous battery copper foil

A chemical corrosion and electrochemical technology, applied in the field of electrochemical hot corrosion preparation, can solve problems such as affecting coating and slurry seepage, and achieve the effect of solving adhesion, improving adhesion and improving activity.

Active Publication Date: 2020-06-30
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 thermal corrosion preparation method and microporous copper foil of a kind of microporous battery copper foil
  • Electrochemical thermal corrosion preparation method and microporous copper foil of a kind of microporous battery copper foil
  • Electrochemical thermal corrosion preparation method and microporous copper foil of a kind of microporous battery copper foil

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Embodiment 1

[0027] A method for preparing a high-performance lithium battery microporous copper foil by electrochemical thermal corrosion 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 , the temperature of the first cleaning solution is kept at 45±2°C, the rolled copper foil is passed through the first cleaning solution, and the time of keeping in the first cleaning solution is 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, the temperature of the chemical etching solution is kept at 45±2°C, the etching tank is used as the cathode, the copper foil is used as the anode, and 48V DC is applied for etching. The residence time of the copper foil ...

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, the temperature of the first cleaning solution is kept at 45±2°C, the rolled copper foil is passed through the first cleaning solution, and the time of keeping in the first cleaning solution is 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 ...

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Abstract

The invention provides an electrochemical thermal etching preparation method of a microporous battery copper foil and a microporous copper foil prepared according to the electrochemical thermal etching preparation method, and belongs to the technical field of preparation of battery copper foils. The method comprises the following steps: washing the surface of a rolled battery copper foil in orderto remove a lubricating agent; dipping the whole washed battery copper foil into a chemical etching solution, wherein the chemical etching solution comprises 0.5-1.5mol / L of HCl, 0.5-2mol / L of C2H2O4,0.1-0.5mol / L of NH4Cl and 0.1-1mol / L of FeCl3; maintaining the temperature of the chemical corrosion solution to be 45+ / -2 DEG C; treating an etch tank as a cathode and treating the battery copper foil as an anode; adding 6-48V DC for etching; keeping the battery copper foil in the etching solution for 20-120s; washing the surface of the etched battery copper foil in order to remove residual solution; and drying. The method is widely applicable to the field of manufacturing of microporous copper foils of lithium batteries.

Description

technical field [0001] The invention discloses an electrochemical thermal corrosion preparation method of microporous battery copper foil, which belongs 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 (graphite slurry, si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/02C23F3/06H01M4/66H01M4/80
CPCC23F3/06C25F3/02H01M4/661H01M4/80Y02E60/10
Inventor 刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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