Chemical corrosive used for manufacturing micropore aluminum foil

A technology of corrosive agent and aluminum foil, which is applied in the direction of electrode carrier/current collector, electrical components, battery electrodes, etc., can solve the problems of reducing the contact resistance of aluminum oxide foil and reducing the mechanical strength of aluminum foil, so as to prevent lithium dendrites, elongation rate increase, resistance The effect of rate increase

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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  • Chemical corrosive used for manufacturing micropore aluminum foil
  • Chemical corrosive used for manufacturing micropore aluminum foil
  • Chemical corrosive used for manufacturing micropore aluminum foil

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A chemical etchant for preparing microporous aluminum foil, using the etchant to corrode battery aluminum foil, according to the following steps:

[0023] 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.

[0024] 2) Press the cleaned aluminum foil into the chemical etching solution: the composition of the chemical etching solution is: 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 in a circular flow mode, so as to achieve uniform corrosion on the upper an...

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Abstract

The invention discloses a chemical corrosive used for manufacturing a micropore aluminum foil, belonging to the technical field of manufacturing of lithium battery anode materials. The invention aimsto solve the technical problem of providing the chemical corrosive for manufacturing the high-performance micropore aluminum foil. The scheme adopted by the invention is characterized in that the corrosive comprises the following solution of molar concentrations: 0.1-3 mol / L of Cl<-> and 0.1-3 mol / L of Fe<3+> and Cu<2+>; the corrosive further comprises the following solution of molar concentrations: 0.01-0.1 mol / L of H<+>; and the corrosive further comprises the following solution of molar concentrations: 0.01-0.1 mol / L of OH<->. The chemical corrosive can be widely applied to the technical field of micropore aluminum foil manufacturing.

Description

technical field [0001] The invention relates to a chemical etchant for preparing microporous aluminum foil, which belongs to the technical field of lithium battery cathode 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 current collector used in the positive electrode of lithium-ion batteries is generally composed of aluminum foil and the positive elect...

Claims

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Application Information

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IPC IPC(8): C23F1/14H01M4/80H01M4/66
CPCC23F1/14H01M4/661H01M4/80Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
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