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Passivation process of ultrathin double-sided light lithium battery copper foil

A double-sided, copper foil technology, applied in the direction of phosphating, chromate treatment, etc., can solve the problems of chromic anhydride waste, increased chromium content in copper foil, and increased cost.

Active Publication Date: 2022-03-22
江西华创新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem in this anti-oxidation process. The passivation solution needs to be replaced continuously. If the passivation solution is not replaced, the chromium content of the copper foil will increase. If the anti-oxidation solution is replaced, a large amount of chromic anhydride will be wasted.
At the same time, chromic anhydride is a toxic substance, and the cost of discharge treatment increases

Method used

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  • Passivation process of ultrathin double-sided light lithium battery copper foil
  • Passivation process of ultrathin double-sided light lithium battery copper foil
  • Passivation process of ultrathin double-sided light lithium battery copper foil

Examples

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Effect test

Embodiment 1

[0017] A passivation process of ultra-thin double-sided light lithium battery copper foil, comprising the following steps:

[0018] Step S1, surface treatment: clean up the dust and impurities on the surface of the copper foil, and rinse with clear water after cleaning;

[0019] Step S2, degreasing: Cleaning and degreasing with cleaning solution, the cleaning solution is mixed with sodium hydroxide, composite degreasing agent and deionized water according to the dosage ratio of 95g: 5mL: 100mL, and the composite degreasing agent includes three groups of A, B and C The A component is a mixture of phenol ethoxy phosphate potassium salt, nonylphenol polyoxyethylene ether and alkyl glycoside in a weight ratio of 2:1:2, and the B component is phenol ethoxylate Potassium phosphate ester, octylphenyl polyoxyethylene ether and alkyl glucoside are mixed according to the weight ratio of 2:1:2, and the C component is phenol ethoxy phosphate potassium salt, cardanol polyoxygen Vinyl ethe...

Embodiment 2

[0026] A passivation process of ultra-thin double-sided light lithium battery copper foil, comprising the following steps:

[0027] Step S1, surface treatment: clean up the dust and impurities on the surface of the copper foil, and rinse with clear water after cleaning;

[0028] Step S2, degreasing: Cleaning and degreasing with cleaning solution, the cleaning solution is mixed with sodium hydroxide, composite degreasing agent and deionized water according to the dosage ratio of 95g: 5mL: 100mL, and the composite degreasing agent includes three groups of A, B and C The A component is a mixture of phenol ethoxy phosphate potassium salt, nonylphenol polyoxyethylene ether and alkyl glycoside in a weight ratio of 2:1:2, and the B component is phenol ethoxylate Potassium phosphate ester, octylphenyl polyoxyethylene ether and alkyl glucoside are mixed according to the weight ratio of 2:1:2, and the C component is phenol ethoxy phosphate potassium salt, cardanol polyoxygen Vinyl ethe...

Embodiment 3

[0035] A passivation process of ultra-thin double-sided light lithium battery copper foil, comprising the following steps:

[0036] Step S1, surface treatment: clean up the dust and impurities on the surface of the copper foil, and rinse with clear water after cleaning;

[0037] Step S2, degreasing: Cleaning and degreasing with cleaning solution, the cleaning solution is mixed with sodium hydroxide, composite degreasing agent and deionized water according to the dosage ratio of 95g: 5mL: 100mL, and the composite degreasing agent includes three groups of A, B and C The A component is a mixture of phenol ethoxy phosphate potassium salt, nonylphenol polyoxyethylene ether and alkyl glycoside in a weight ratio of 2:1:2, and the B component is phenol ethoxylate Potassium phosphate ester, octylphenyl polyoxyethylene ether and alkyl glucoside are mixed according to the weight ratio of 2:1:2, and the C component is phenol ethoxy phosphate potassium salt, cardanol polyoxygen Vinyl ethe...

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Abstract

The invention relates to a passivation process of an ultrathin double-sided light lithium battery copper foil. The passivation process comprises the following steps: step S1, surface treatment; step S2, degreasing; s3, coarsening for the first time; step S4, carrying out secondary coarsening; step S5, curing; s6, passivating treatment is conducted through a passivating solution; step S7, carrying out post-treatment; the chromium content of the copper foil can be controlled by adjusting technological parameters of the anti-oxidation liquid, the chromium content of the copper foil is adjusted according to different production specifications, the chromium content of the copper foil (6 microns) is smaller than or equal to 150 ppm, and the chromium content of the copper foil (8 microns) is smaller than or equal to 100 ppm; (2) zero discharge of the anti-oxidation liquid is realized, and the anti-oxidation liquid can be recycled and continuously used; and (3) the oxidation resistance of the copper foil is improved, and the copper foil can be baked at 150 DEG C for 15 minutes without oxidation discoloration.

Description

technical field [0001] The invention belongs to the technical field of metal material surface processing, and in particular relates to a passivation process of an ultra-thin double-sided photolithium battery copper foil. Background technique [0002] Chromium anhydride passivation process is commonly used in the current lithium battery copper foil industry. This process is relatively mature, and the oxidation resistance of copper foil can meet the industry standard 140°C for 15 minutes (150°C for 10 minutes) without oxidation and discoloration. However, there is a problem in this anti-oxidation process. The passivation solution needs to be replaced continuously. If the passivation solution is not replaced, the chromium content of the copper foil will increase. If the anti-oxidation solution is replaced, a large amount of chromic anhydride will be wasted. At the same time, chromic anhydride is a toxic substance, and the cost of discharge treatment increases. The main purpose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/38C25D11/36C25D7/06
CPCC25D11/38C25D11/36C25D7/0614Y02E60/10
Inventor 曹露操声跃何桂青江明周强
Owner 江西华创新材有限公司
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