Chemical etchant for preparing microporous copper foils

An etchant, copper foil technology, applied in chemical electrode manufacturing, chemical instruments and methods, electrode manufacturing, etc., can solve problems affecting coating, slurrying, etc., to prevent lithium dendrites, improve adhesion, and improve copper surface performance Effect

Inactive Publication Date: 2018-12-11
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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  • Chemical etchant for preparing microporous copper foils
  • Chemical etchant for preparing microporous copper foils
  • Chemical etchant for preparing microporous copper foils

Examples

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Embodiment 1

[0029] A chemical etchant for preparing microporous copper foil, using the etchant to corrode battery copper foil, according to the following steps:

[0030] 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.

[0031]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 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 solution at the same time, and the corrosive s...

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Abstract

The invention discloses a chemical etchant for preparing microporous copper foils, which belongs to the technical field of lithium battery anode material preparation. The technical problem which needsto be solved is to provide the chemical etchant for preparing high-performance microporous copper foils, and the adopted solution is as follows: the etchant comprises the following molar concentrations of solutions: 0.5mol/L to 1.5mol/L of HCl, 0.5mol/L to 2mol/L of C<2>H<2>O<4>, 0.1mol/L to 0.5mol/L of NH<4>Cl and 0.1mol/L to 1mol/L of FeCl<3>, the etchant further comprises the following molar concentration of solution 0.5mol/L to 1.5mol/L of HgCl<2>, and the etchant further comprises the following molar concentration of solution 0.1mol/L to 0.5mol/L of AgCl<2>. The chemical etchant can be widely applied in the technical field of microporous copper foil preparation.

Description

technical field [0001] The invention discloses a chemical etchant for preparing microporous copper foil, which belongs to the technical field of lithium battery negative electrode material 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, silicon carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K13/04H01M4/04
CPCC09K13/04H01M4/04H01M4/049Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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