Electrochemical corrosion preparation method of copper foil of microporous battery and microporous copper foil

An electrochemical and copper foil technology, applied in the field of battery copper foil preparation, can solve problems such as affecting coating and slurry penetration, and achieve the effect of solving adhesion, improving adhesion and high smoothness

Inactive Publication Date: 2018-12-14
산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
View PDF4 Cites 0 Cited by
  • 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

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 of copper foil of microporous battery and microporous copper foil
  • Electrochemical corrosion preparation method of copper foil of microporous battery and microporous copper foil
  • Electrochemical corrosion preparation method of copper foil of microporous battery and microporous copper foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a high-performance lithium battery microporous copper foil by electrochemical corrosion, which 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 , pass the rolled copper foil through the first cleaning solution, and keep it in the first cleaning solution for 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, 0.1mol / L FeCl 3 , 1mol / L HgCl 2, 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 so...

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. Pass the rolled copper foil through the first cleaning solution, and keep it in the first cleaning solution for 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 safe voltage such as 36V, 64V, and the corrosion time is 20s. The corrosion time ...

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

The invention discloses an electrochemical corrosion preparation method of a copper foil of a microporous battery and a microporous copper foil, and belongs to the technical field of preparation of battery copper foils. The technical scheme is carried out by the following steps: carrying out surface cleaning on a rolled battery copper foil to remove a lubricant; completely immersing all cleaned battery copper foils in a chemical corrosion solution, wherein the chemical corrosion solution is prepared from 0.5 to 1.5 mol / L of HCl, 0.5 to 2 mol / L of C2H2O4, 0.1 to 0.5 mol / L of NH4Cl, 0.1 to 1 mol / L of FeCl3 and 0.5 to 1.5 mol / L of HgCl2; taking a corrosion groove as a cathode, taking a battery copper foil as an anode, corroding by using 6 to 64V direct current and enabling the battery copperfoil to stay in the corrosion solution for 20 to 120 seconds; cleaning residual liquid on the surface of the corroded battery copper foil and drying. The electrochemical corrosion preparation method disclosed by the invention can be widely applied to the production field of the microporous copper foils of lithium batteries.

Description

technical field [0001] The invention discloses an electrochemical corrosion preparation method of microporous battery copper foil and the microporous copper foil, belonging 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 ...

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): C25F3/02C23F3/06H01M4/66H01M4/80
CPCC23F3/06C25F3/02H01M4/661H01M4/80Y02E60/10
Inventor 王宥宏刘忆恩
Owner 산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap