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Chlorine salt corrosive agent for preparing microporous aluminum foil

A technology of etchant and chloride salt, applied in the corrosive field of high-performance lithium battery positive electrode material, can solve the problems of reducing the contact resistance of alumina foil, reducing the mechanical strength of aluminum foil, etc., to prevent lithium dendrites, improve elongation, and high smoothness. Effect

Inactive Publication Date: 2018-02-27
산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact resistance of the obtained aluminum oxide foil is not significantly reduced, and the mechanical strength of the aluminum foil is reduced during the corrosion removal process

Method used

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  • Chlorine salt corrosive agent for preparing microporous aluminum foil
  • Chlorine salt corrosive agent for preparing microporous aluminum foil
  • Chlorine salt corrosive agent for preparing microporous aluminum foil

Examples

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Effect test

Embodiment 1

[0023] A chemical etchant for preparing microporous aluminum foil, using the etchant to corrode battery aluminum foil, according to the following steps:

[0024] 1) Clean the surface of the rolled battery aluminum foil to remove the lubricant: the composition of the first cleaning solution is 5g / L NaOH, 70g / L NaOH 2 CO 3 , 40g / L of Na 3 PO 4 , pass the rolled aluminum foil through the first cleaning solution, and keep it in the first cleaning solution for 6s.

[0025] 2) Press the cleaned aluminum foil into the chemical etching solution: the composition of the chemical etching solution is: 0.5mol / L NaCl, 0.1mol / L BaCl 2 , 0.1mol / L of CaCl 2 , 0.1mol / L NH 4 Cl, 0.1mol / L CuCl 2 , 0.1mol / L FeCl 3 The residence time of the aluminum foil in the etchant is 20s. At this stage, ensure that the upper and lower surfaces of the aluminum foil are soaked in the corrosive solution at the same time, and the corrosive solution flows on the upper and lower surfaces of the aluminum foil ...

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Abstract

The invention relates to a chlorine salt corrosive agent for preparing microporous aluminum foil, and particularly relates to the corrosive agent for a high-performance lithium battery positive electrode material. The chlorine salt corrosive agent overcomes the defects of an existing technology. The purpose is to provide the corrosive agent for a high-performance lithium battery positive electrodecurrent collector material. According to the technical scheme, the chlorine salt corrosive agent used for preparing the microporous aluminum foil is a salt solution, wherein the chlorine salt corrosive agent is the salt solution with negative ions only containing chloride ions, the molar concentration of Cl<-> is 0.1-3mol / L, and positive ions contain Fe<3+> and Cu<2+> with the molar concentrationof 0.1-3mol / L. The chlorine salt corrosive agent can be widely applied to the field of battery aluminum foil manufacturing.

Description

technical field [0001] The invention relates to a chlorine salt etchant for preparing microporous aluminum foil, in particular to an etchant for high-performance lithium battery cathode materials. 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 current collector used in the positive electrode of lithium-ion batteries is generally composed of aluminum foil and the positive elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/14H01M4/74H01M10/0525
CPCC23F1/14H01M4/742H01M10/0525Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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