Additive for electrolytic copper foil and production process of electrolytic copper foil for 7-mu. m double-light lithium ion battery

A lithium-ion battery and electrolytic copper foil technology, applied in the field of electrolytic copper foil production, can solve the problems of production difficulties, vertical stripe defects, long supply cycle, etc., and achieve the effect of reducing total cost and increasing profit margins

Active Publication Date: 2013-05-01
LINGBAO WASON COPPER FOIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the additives used by domestic battery foil manufacturers are imported from Korea, Germany and other countries. There are many types (at least 4 kinds) and complex ratios, coupled with high cost and long delivery cycle, which greatly limits the electrolytic copper foil. production, how to solve such problems is imminent
[0003] In addition, due to the characteristics of double-sided photoelectrolytic copper foil, its production is difficult, especially the production of ultra-thin 7μm, which is very easy to produce edge tearing and vertical grain defects after winding after more than 300 meters, which requires the addition of special additives and more types. Many, the normal control of the production process is very difficult

Method used

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  • Additive for electrolytic copper foil and production process of electrolytic copper foil for 7-mu. m double-light lithium ion battery
  • Additive for electrolytic copper foil and production process of electrolytic copper foil for 7-mu. m double-light lithium ion battery
  • Additive for electrolytic copper foil and production process of electrolytic copper foil for 7-mu. m double-light lithium ion battery

Examples

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Effect test

Embodiment 1

[0022] An additive for electrolytic copper foil, the additive is an aqueous solution containing brightener DPS and industrial gelatin, the concentration of DPS in the additive is 15g / l, and the concentration of industrial gelatin is 4g / l. The molecular weight of the selected industrial gelatin is 10000-30000, the same below.

[0023] The production process of using the above-mentioned additives to prepare 7 μm electrolytic copper foil for dual-light lithium-ion batteries includes the following steps:

[0024] 1) Copper-dissolving solution: add the raw material copper rod after annealing to remove impurities into the copper-dissolving tank, add high-purity water and dilute sulfuric acid and blow in air, dissolve it at 85°C to form copper sulfate electrolyte, and adjust copper sulfate The copper ion content in the electrolyte is 95g / L, the H 2 SO 4 Concentration 115g / L, chloride ion content 29ppm, temperature 50°C;

[0025] 2) Electrolytic foil production: The above-mentioned...

Embodiment 2

[0028] An additive for electrolytic copper foil, the additive is an aqueous solution containing brightener DPS and industrial gelatin, the concentration of DPS in the additive is 10g / l, and the concentration of industrial gelatin is 2.5g / l. The molecular weight of the selected industrial gelatin is 10000-30000, the same below.

[0029] The production process of using the above-mentioned additives to prepare 7 μm electrolytic copper foil for dual-light lithium-ion batteries includes the following steps:

[0030] 1) Copper-dissolving solution: add the raw material copper rod after annealing to remove impurities into the copper-dissolving tank, add high-purity water and dilute sulfuric acid and blow in air, dissolve it at 85°C to form copper sulfate electrolyte, and adjust copper sulfate The copper ion content in the electrolyte is 75g / L, the H 2 SO 4 The concentration is 95g / L, the chloride ion content is 25ppm, and the temperature is 46°C;

[0031] 2) Electrolytic foil produ...

Embodiment 3

[0034] An additive for electrolytic copper foil, the additive is an aqueous solution containing brightener DPS and industrial gelatin, the concentration of DPS in the additive is 7g / l, and the concentration of industrial gelatin is 1.5g / l. The molecular weight of the selected industrial gelatin is 10000-30000, the same below.

[0035] The production process of using the above-mentioned additives to prepare 7 μm electrolytic copper foil for dual-light lithium-ion batteries includes the following steps:

[0036] 1) Copper-dissolving solution: add the raw material copper rod after annealing to remove impurities into the copper-dissolving tank, add high-purity water and dilute sulfuric acid and blow in air, dissolve it at 85°C to form copper sulfate electrolyte, and adjust copper sulfate The copper ion content in the electrolyte is 60g / L, the H 2 SO 4 The concentration is 75g / L, the chloride ion content is 21ppm, and the temperature is 42°C;

[0037] 2) Electrolytic foil produc...

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Abstract

The invention relates to an additive for an electrolytic copper foil. The additive is aqueous solution containing a brightening agent DPS and industrial gelatin, wherein the concentration of the DPS in the additive is 5-15g / L, and the concentration of the industrial gelatin is 1-4g / L. The invention further discloses a production process for preparing the electrolytic copper foil for a 7-mu. m double-light lithium ion battery by adopting the additive. The cost of the additive is lower, the performance index of the produced electrolytic copper foil meets a specified requirement, and the electrolytic copper foil can be taken as a copper foil special for a lithium battery.

Description

technical field [0001] The invention belongs to the technical field of electrolytic copper foil production, and in particular relates to an additive for electrolytic copper foil and a production process of electrolytic copper foil for 7 μm dual-light lithium-ion batteries. Background technique [0002] In recent years, with the rapid development of portable electronic products and the use of large-scale lithium-ion green power batteries, the lithium battery industry has developed rapidly, and the electrolytic copper foil used as the negative electrode material of lithium batteries has ushered in new development opportunities. However, the characteristics of lithium battery foil make it very demanding on the type, proportion and quality of additives. At present, most of the additives used by domestic battery foil manufacturers are imported from Korea, Germany and other countries. There are many types (at least 4 kinds) and complex proportions, coupled with high cost and long ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/06C25D3/38
Inventor 何成群赵原森李继峰张欣赵姣姣何铁帅柴云白啦啦周永森王媛媛
Owner LINGBAO WASON COPPER FOIL
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