Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrochemical corrosion preparation method for microporous battery aluminum foil

A chemical corrosion and electrochemical technology, applied in battery electrodes, electrode manufacturing, electrode carriers/current collectors, etc., can solve the problems of reducing the contact resistance of alumina foil and reducing the mechanical strength of aluminum foil, achieving good performance consistency and controlling product quality. And the effect of production speed and environmental pollution is small

Inactive Publication Date: 2018-02-02
산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
View PDF6 Cites 3 Cited by
  • Summary
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrochemical corrosion preparation method for microporous battery aluminum foil
  • Electrochemical corrosion preparation method for microporous battery aluminum foil
  • Electrochemical corrosion preparation method for microporous battery aluminum foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1-2 Shown, a microporous battery aluminum foil, a microscopic image of the microporous battery aluminum foil. The microporous battery aluminum foil has 1000-1500 through holes with a diameter of 10-15 μm and 1000-3000 blind holes with a diameter of 10-50 μm per square centimeter. The holes and blind holes are irregular in shape, and the junction between each hole and the surface of the aluminum foil is an irregular arc transition, and the diameters in different directions are different; the upper and lower surfaces of the aluminum foil are distributed with multiple notches of different lengths and depths. The depth of the marks is 1-3 μm, the width is 1-5 μm, and the length is 100-1000 μm. The thickness of the battery aluminum foil is 15 μm, and 10 μm, 12 μm, 16 μm, 20 μm, etc. can also be selected.

[0028] The above-mentioned microporous metal material, that is, microporous battery aluminum foil, is made by chemical liquid corrosion method, and is car...

Embodiment 2

[0050] A microporous metal material, the material is battery aluminum foil, the microporous battery aluminum foil has 1000-1500 through holes with a diameter of 10-15μm and 1000-3000 through-holes with a diameter of 10-50μm per square centimeter. Uniform blind holes, each through hole and blind hole is irregular in shape, and the junction of each hole and the surface of the aluminum foil is an irregular arc transition, and the diameters in different directions are different; the upper and lower surfaces of the aluminum foil are distributed with multiple lengths Scores of different depths, 1-3 μm deep, 1-5 μm wide, and 100-1000 μm long, the thickness of the battery aluminum foil is 15 μm, and 10 μm, 12 μm, 16 μm, 20 μm, etc. can also be selected.

[0051] Microporous battery aluminum foil is made by chemical liquid corrosion method, follow the steps below:

[0052] 1) Clean the surface of the rolled battery aluminum foil to remove the lubricant: the composition of the first cle...

Embodiment 3

[0060] The preparation method of microporous battery aluminum foil electrochemical corrosion is carried out according to the following steps:

[0061] 1) Clean the surface of the rolled battery aluminum foil to remove the lubricant: the composition of the first cleaning solution is 20g / L NaOH, 40g / L NaOH 2 CO 3 , 10g / 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 10s.

[0062] 2) Press the cleaned aluminum foil into the chemical etching solution: the composition of the chemical etching solution is: 1.5mol / L NaCl, 0.3mol / L BaCl 2 , 0.2mol / L CaCl 2 , 0.5mol / L CuCl 2 , 0.3mol / L FeCl 3 , the corrosion tank is used as the cathode, the battery aluminum foil is used as the anode, and 24V DC is applied for corrosion. The DC can be set to a safe voltage such as 36V, 48V, and the residence time of the aluminum foil in the corrosive agent is 60s. At this stage, ensure that the upper and lower surfac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Belonging to the technical field of preparation of battery aluminum foils, the invention provides an electrochemical corrosion preparation method for a microporous battery aluminum foil. The inventionovercomes the defects of the existing technology, and aims to provide an electrochemical corrosion preparation method for a high-performance lithium battery microporous aluminum foil. The technical scheme is carried out according to the steps of: conducting surface cleaning on a rolled battery aluminum foil to remove a lubricant; immersing the cleaned battery aluminum foil totally in a chemical corrosive liquid, which is a salt solution and contains Cl<-> anions with a molar concentration of 0.1-3mol / L, and Fe<3+> and Cu<2+> cations with a molar concentration of 0.1-3mol / L, adopting a corrosion groove as the negative electrode, using the battery aluminum foil as the positive electrode, applying 24V direct current for corrosion, retaining the battery aluminum foil in the corrosive liquid for 20-120s; and cleaning the surface residual liquid on the corroded battery aluminum foil, and performing drying. The preparation method provided by the invention can be widely applied to the manufacturing field of lithium battery microporous aluminum foils.

Description

technical field [0001] The invention discloses an electrochemical corrosion preparation method of microporous battery aluminum foil, which belongs to the technical field of battery aluminum 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 current collector used in the positive electrode of lithium-ion batteries is generally composed of aluminum foil and the po...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/04C25F3/04
CPCC25F3/04H01M4/0452H01M4/661Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com