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

A high-performance additive for the preparation of ultra-thin double-sided glossy copper foil

An additive and high-performance technology, applied in electroforming, electrolysis process, etc., can solve the problems of increasing internal stress of copper film, affecting battery performance, uneven coating, etc., reducing internal stress and improving uneven coating. , the effect of improving the folding resistance

Active Publication Date: 2020-06-02
SHANDONG JINBAO ELECTRONICS
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Additives such as SPS, SP, and polyethylene glycol are commonly used in the production of double-sided copper foil. Although these substances have good leveling properties, they are more likely to cause an increase in the internal stress of the copper film, thereby causing the copper foil to curl. , in the production of lithium batteries, it is easy to cause uneven coating, which affects the performance of the battery and is more harmful; and in the production of winding type batteries, copper foil is required to have better folding resistance, so the selected double-sided Light copper foil must have higher performance indicators

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-performance additive for the preparation of ultra-thin double-sided glossy copper foil, which contains, in parts by weight, per 10,000 parts of electrolyte: 0.15 parts of 2-mercaptobenzimidazole, 1 part of polyethyleneimine alkyl salt, 0.5 parts Acid copper wetting agent fatty amine polyoxyethylene ether, 10 parts collagen powder and 0.2 parts cerium oxide.

[0019] The process conditions of the electrolytic foil production step are as follows: the copper sulfate electrolyte is fed into the foil production machine, the copper ion content is 80g / L, the sulfuric acid content is 120g / L, the chloride ion content is 25ppm, and the electrolysis temperature is 45-62°C. Current density 50-60A / dm 2 , the produced double-sided light ultra-thin copper foil is 8μm.

[0020] The folding endurance and warpage of the obtained copper foil were tested, and the test results are shown in Table 1.

Embodiment 2

[0022] A high-performance additive for the preparation of ultra-thin double-sided glossy copper foil, which contains, in parts by weight, per 10,000 parts of electrolyte: 0.3 part of 2-mercaptobenzimidazole, 0.8 part of polyethyleneimine alkyl salt, 0.65 part Acid copper wetting agent amine ethoxylate, 20 parts collagen powder, and 0.5 parts cerium oxide.

[0023] The process conditions of the electrolytic foil production step are: feed the copper sulfate electrolyte into the foil production machine, the content of copper ions is 85g / L, the content of sulfuric acid is 112g / L, the content of chloride ions is 17ppm, and the electrolysis temperature is 45-62°C. Current density 50-60A / dm 2 , the produced double-sided light ultra-thin copper foil is 8μm.

[0024] The folding endurance and warpage of the obtained copper foil were tested, and the test results are shown in Table 1.

Embodiment 3

[0026] A high-performance additive for the preparation of ultra-thin double-sided glossy copper foil, which contains, in parts by weight, per 10,000 parts of electrolyte: 0.5 part of 2-mercaptobenzimidazole, 0.9 part of polyethyleneimine alkyl salt, 0.1 part Acid copper wetting agent (mixture of alkylaminophenol polyoxyethylene ether and potassium perfluoroalkyl sulfonate at a weight ratio of 1:1), 30 parts of collagen powder and 0.1 part of cerium oxide.

[0027] The process conditions of the electrolytic foil production step are: feed the copper sulfate electrolyte into the foil production machine, the content of copper ions is 98g / L, the content of sulfuric acid is 90g / L, the content of chloride ions is 36ppm, and the electrolysis temperature is 45-62℃. Current density 50-60A / dm 2 , the produced double-sided light ultra-thin copper foil is 8μm.

[0028] The folding endurance and warpage of the obtained copper foil were tested, and the test results are shown in Table 1.

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 belongs to the technical field of electrolytic copper foil machining, particularly relates to an additive for preparing high-performance ultrathin two-side smooth copper foil. Electrolyte per 10000 parts is prepared from the components in parts by weight: 0.1-0.5 part of 2-mercaptobenzimidazole, 0.8-1 part of polyethyleneimine alkyl salts, 0.5-1 part of wetting agent for acid copper,10-30 parts of collagen powders and 0.1-1 part of cerium oxide. According to a lithium-ion battery two-side smooth copper foil prepared by using the additive for preparing the high-performance ultrathin two-side smooth copper foil, degree of curling of the copper foil can be controlled to be below 4 mm, and thus the problem that the degree of curling of the copper foil causes uneven coating during preparing a lithium-ion battery can be improved, and meanwhile, copper foil own internal stress is reduced, fold-resistance times can be up to 9000 times, the folding resistance is greatly improved,and a cohesive force between the copper foil and active materials is improved. The prepared copper soil has good mechanical flexibility, in the condition of bending or twisting repeatedly, electrodestructures are not subjected to damage, and electrochemical performance has no apparent changes.

Description

technical field [0001] The invention belongs to the technical field of electrolytic copper foil processing, and in particular relates to an additive for preparing high-performance ultra-thin double-sided smooth copper foil. Background technique [0002] When the high-capacity power cell is charged and discharged quickly at a high rate, as the internal temperature of the cell changes during the process, the lithium battery copper foil as the negative electrode current collector also expands and contracts repeatedly with the expansion and contraction of the negative electrode material. Various performance indicators such as resistance, flexibility, oxidation resistance, and adhesion should also be improved. As one of the key materials for new energy batteries, the quality of copper foil for lithium batteries directly affects the technology and performance of batteries, and is currently an important field of global new energy battery competition. [0003] Additives such as SPS...

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 Patents(China)
IPC IPC(8): C25D3/38C25D1/04C25D7/06
CPCC25D1/04C25D3/38C25D7/0614
Inventor 王其伶杨祥魁王维河王学江孙云飞谢锋徐策徐好强薛伟宋佶昌张艳卫王先利
Owner SHANDONG JINBAO ELECTRONICS
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