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A preparation process of porous copper foil, its product and application

A preparation process and technology of porous copper, applied in cables, insulated conductors, structural parts, etc., can solve the problem of high energy consumption, and achieve the effects of low energy consumption, good electrical conductivity and small pore size

Active Publication Date: 2022-07-08
浙江花园新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires a vacuum and high-temperature environment, and the energy consumption is high.

Method used

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  • A preparation process of porous copper foil, its product and application
  • A preparation process of porous copper foil, its product and application
  • A preparation process of porous copper foil, its product and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Commercially available brass foil (62 brass, zinc content about 38wt%), 0.01mm thick, was cut into small pieces of 20×20mm, and methylene chloride was used as a cleaning agent to degrease the brass surface, and then Clean brass surfaces and dry until use.

[0039] The composition of chemical leaching solution: water as solvent, 10g / L sulfamic acid, 50g / L ammonium chloride, 20g / L choline chloride. Immerse the cut brass foil in the chemical dipping solution and react at 50°C for 10min.

[0040] figure 1 The SEM image of the porous copper foil prepared in this example. It can be seen from the figure that the distribution of pores on the surface of the prepared porous copper foil is relatively uniform, and the diameter of the pores is relatively consistent. The pore size distribution range is 0.30-0.80 μm, the average pore size is about 0.55 μm, and the pore size uniformity is good.

[0041] The porous copper foil prepared in this example was placed and baked at 250° C....

Embodiment 2

[0044] Use commercially available brass foil (62 brass, zinc content about 38wt%), 0.1mm thick, cut into small pieces of 20×20mm, use ethanol as a cleaning agent to degrease the brass surface, and then clean it up Brass finish and dry for use.

[0045] The composition of chemical zinc leaching solution: water as solvent, 5g / L sulfamic acid, 15g / L ammonium chloride, 5g / L choline chloride. Immerse the cut brass foil in the chemical dipping solution and react at 40°C for 2h.

[0046]After characterization, the porous copper foil prepared in this example has a relatively uniform distribution of holes on the surface, and the hole diameters are relatively consistent, about 0.30-0.90 μm, with good uniformity and an average pore diameter of about 0.62 μm.

[0047] The porous copper foil prepared in this example was placed and baked at 250° C. for 60 minutes, and no oxidative discoloration occurred on the surface of the porous copper foil, indicating that it has excellent anti-oxidati...

Embodiment 3

[0050] Use commercially available brass foil (62 brass, zinc content about 38wt%), 0.1mm thick, cut into small pieces of 20 × 20mm, use acetone as a cleaning agent to degrease the brass surface, and then clean it up Brass finish and dry for use.

[0051] The composition of chemical zinc leaching solution: water as solvent, 20g / L sulfamic acid, 80g / L ammonium chloride, 40g / L choline chloride. Immerse the cut brass foil in a chemical dipping solution and react at 70° C. for 5 min.

[0052] The characterization shows that the pores on the surface of the porous copper foil prepared in this example are independent, the distribution is relatively uniform, the diameter of the pores is relatively consistent, the size distribution of the pores is 0.50-1.0 μm, and the average pore diameter is about 0.74 μm.

[0053] The porous copper foil prepared in this example was placed and baked at 250° C. for 60 minutes, and no oxidative discoloration occurred on the surface of the porous copper ...

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Abstract

The invention discloses a process for preparing porous copper foil. Using brass alloy foil as raw material, the porous copper foil is prepared by wet chemical metallurgical leaching. It is prepared after the reaction; the chemical zinc leaching solution is composed of raw materials including sulfamic acid with a concentration of 5-20 g / L, choline chloride with a concentration of 5-50 g / L, and soluble ammonium salt with a concentration of 10-100 g / L and water. The preparation process disclosed by the invention has the advantages of simple and controllable process, low energy consumption, and the prepared porous copper foil has independent and uniform pores, small pore diameter and high uniformity, good electrical conductivity and high heat resistance, and can be processed into a cladding foil. After the copper plate is bonded with the organic polymer, the anti-peeling strength is high, and it can be used as the negative electrode current collector of the lithium ion battery and the copper foil for electronic circuits.

Description

technical field [0001] The invention relates to the technical field of nanoporous metal materials, in particular to a preparation process of porous copper foil and its products and applications in printed circuit boards, supercapacitors, lithium ion battery current collectors and wire and cable shielding layers. Background technique [0002] Copper has good electrical conductivity and mechanical properties and is widely used in printed circuit boards, supercapacitors, lithium-ion battery current collectors, and power transmission wires. With the rapid development of the electronics industry, new energy utilization and electric vehicles, higher requirements have been placed on the performance of lithium-ion batteries that provide energy for them. Copper foil is used as the carrier of the negative electrode active material of lithium ion battery, and also acts as the negative electrode electron collection and conduction. [0003] In order to improve the energy density and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/30C22C3/00C22C1/08H01M4/66H01M4/80H01B7/17C22C9/04
CPCC23F1/30C22C3/00C22C1/08H01M4/661H01M4/80H01B7/17C22C9/04Y02E60/13
Inventor 张欣罗辉葛啸鹏俞俊马俊峰
Owner 浙江花园新能源股份有限公司
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