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High-strength electrolytic copper foil and various products using the same

An electrolytic copper foil, high-strength technology, applied in the direction of electrolytic process, electroforming, circuit, etc., can solve the problem of not being able to provide ultra-thin copper foil that meets the strength requirements

Active Publication Date: 2021-07-02
FUJIAN QINGJING COPPER FOIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art cannot provide ultra-thin copper foils of 6 microns and below that meet the strength requirements

Method used

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  • High-strength electrolytic copper foil and various products using the same
  • High-strength electrolytic copper foil and various products using the same
  • High-strength electrolytic copper foil and various products using the same

Examples

Experimental program
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Effect test

preparation example Construction

[0054] Please refer to Figure 7 , the present invention also provides a preparation method of electrolytic copper foil, comprising the following steps:

[0055] S4, copper sulfate electrolyte configuration: heat and dissolve high-purity copper wires with a purity of 99.95% and above in sulfuric acid solution to generate copper sulfate electrolyte;

[0056] S5, raw foil manufacturing; add additives to the copper sulfate electrolyte, and transport it to the electrolytic cell of the foil machine for electrolytic raw foil, wherein; the process parameters of electrolytic raw foil are: the temperature of the electrolytic solution is controlled at 50-60 °C, the current density of the anode plate 12 during the foil production process is 38-45A / dm 2 , Cu 2+ Concentration is 90~95g / L, H 2 SO 4 Concentration is 100-110g / L, gelatin concentration is 100-300ppm, ceric sulfate concentration is 0.5-10ppm, MESS concentration is 1-20ppm, SPS concentration is 10-50ppm, Cl - The concentrati...

Embodiment

[0069] Example: heating and dissolving a high-purity copper wire with a purity of 99.95% in a sulfuric acid solution to form a copper sulfate electrolyte; adding additives to the copper sulfate electrolyte, and transporting it to the electrolytic cell of a foil production machine for electrolytic foil production. Among them; the process parameters of electrolytic raw foil are: the temperature of the electrolyte is controlled at 58 ° C, Cu 2+ Concentration is 94g / L, H 2 SO 4 Concentration is 106g / L, gelatin concentration is 150ppm, ceric sulfate concentration is 4ppm, MESS concentration is 12ppm, SPS concentration is 25ppm, Cl - The concentration is 28ppm; copper foils of 4 microns, 4.5 microns, 5 microns and 6 microns are respectively obtained by controlling the current density of the anode plate during the foil production process. The test data of various copper foils are as follows:

[0070]

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Abstract

The invention provides a high-strength electrolytic copper foil, which has a thickness of 4-6 microns, a tensile strength of 600-560 MPa at room temperature, and a tensile strength of 350-400 MPa after heating at 150°C for 15 minutes, and is The elongation at room temperature and after heating at 150°C for 15 minutes reaches 3.5-10%; and the warpage of the high-strength electrolytic copper foil is less than or equal to 5mm. The present invention also provides various products using the copper foil.

Description

technical field [0001] The present invention relates to a high-strength electrolytic copper foil and various products using the copper foil. Background technique [0002] At present, electrolytic copper foil is an indispensable and important basic material for the electronics industry and the new energy lithium battery industry. It can be used as the negative electrode collector in lithium batteries, and is generally prepared from traditional 8-micron-thick copper foil. Replacing the existing copper foil with a thickness of 8 microns with a copper foil with a thickness of less than 6 microns, or even about 4.5 microns, can increase the energy density of the battery on the one hand, thus having a broader market prospect. However, in the prior art, ultra-thin copper foils of 6 microns or less that meet the strength requirements cannot be provided. Contents of the invention [0003] The invention provides a high-strength electrolytic copper foil and various products using th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D1/04F16S1/00H01M4/66H05K9/00
CPCC25D1/04F16S1/00H01M4/661H05K9/0081Y02E60/10
Inventor 贾永良宋铁峰陈亮龙郭贵龙郭小高黄耀辉
Owner FUJIAN QINGJING COPPER FOIL