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Electrolytic copper foil surface treatment method

A technology of surface treatment and electrolytic copper foil, which is applied in the direction of metal material coating process, etc.

Inactive Publication Date: 2015-06-03
雷磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the traditional electrolytic copper foil passivation process is that it uses highly toxic and highly polluting hexavalent chromium as the anti-oxidation treatment of copper foil. It is imperative to develop and promote a non-toxic and environmentally friendly copper foil chromium-free passivation process.

Method used

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  • Electrolytic copper foil surface treatment method

Examples

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Effect test

Embodiment example 1

[0022] The traditional post-processing machine processes 9 micron double-sided photoelectrolytic copper foil, and the passivation solution component is Zn 2+ 50 g / L, Ni 2+ 5.0g / L; sodium dihydrogen phosphate 1.0g / L; 1-phenyl-5-mercaptotetrazolium (PMTA) 3.0g / L; sodium citrate 60 g / L; pH value: 3.5~5.5, current density 0.5A / dm 2 ; Processing copper foil line speed 30m / min.

Embodiment example 2

[0024] The one-piece machine processes 9 micron double-sided photoelectrolytic copper foil, and the passivation solution component is Zn 2+ 30 g / L, Ni 2+ 3.0g / L; sodium dihydrogen phosphate 1.0g / L; 1-phenyl-5-mercaptotetrazolium (PMTA) 2.0g / L; sodium citrate 60 g / L; pH value: 3.5~5.5, current density 0.3 A / dm 2 ; Processing copper foil line speed 6.0m / min.

Embodiment example 3

[0026] One-piece machine processing ultra-thin 7 micron double-sided photoelectrolytic copper foil, the passivation solution component is Zn 2+ 30 g / L, Ni 2+ 3.0g / L; sodium dihydrogen phosphate 1.0g / L; 1-phenyl-5-mercaptotetrazolium (PMTA) 2.0g / L; sodium citrate 60 g / L; pH value: 3.5~5.5, current density 0.3 A / dm 2 ; Processing copper foil line speed 6.8m / min.

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Abstract

The invention relates to an electrolytic copper foil surface treatment method. The electrolytic copper foil surface treatment method is characterized by comprising the following steps: (1) preparing a passivation solution from the following chemical components: a main salt sulfate containing 10-80g / L of Zn<2+> and 1.0-10g / L of Ni<2+>, 0.5-2.0g / L of sodium dihydrogen phosphate, 1.0-8g / L of organic corrosion inhibitor 1-phenyl-5-mercaptotetrazole (PMTA), 20-120g / L of buffering agent sodium citrate, and keeping the pH value within the range of 3.5-5.5; and (2) performing the following operation process: adding analytically pure zinc sulfate hydrate and nickel sulfate hydrate for inorganic matter sulfates according to the detection result allocation by use of a metering pump; metering and adding sodium dihydrogen phosphate, the organic corrosion inhibitor and the buffering agent according to the detection result allocation, automatically regulating and controlling the pH value by use of 5% NaOH and 5% dilute sulfuric acid; keeping the current density within the range of 0.2-0.5A / dm<2> and the linear velocity of treating the copper foil within the range of 2-30m / min, performing the subsequent steps of water washing, drying by squeezing, hot air blow-drying and winding.

Description

technical field [0001] The invention relates to an anti-oxidation treatment process for the surface of electrolytic copper foil, more particularly, an environment-friendly chromium-free passivation process for the negative electrode current collector copper foil for high-performance lithium-ion batteries. Background technique [0002] In recent years, environmental pollution problems such as urban smog have become increasingly serious, and various parties are vigorously promoting environmentally friendly electric transportation to reduce fossil fuel combustion and vehicle exhaust emissions. In addition, with the accelerated development of mobile networks and the continuous upgrading of portable electronic devices, people's requirements for high-quality mobile power sources are getting higher and higher. Lithium-ion secondary rechargeable batteries have natural advantages to meet the needs of the society, and the development of production technology and process improvement of...

Claims

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Application Information

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IPC IPC(8): C23C22/12
CPCC23C22/07
Inventor 雷磊
Owner 雷磊
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