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A kind of manufacturing method of porous double-sided smooth copper foil

A manufacturing method and copper foil technology are applied in the manufacturing field of porous double-sided optical copper foil, which can solve the problems of difficult realization of porous copper foil, inability to etch copper foil with a thickness of less than 12 microns, etc. Low cost and improved overall performance

Active Publication Date: 2020-01-03
甘肃海亮新能源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use similar circuit board etching methods to etch away the reserved small holes, but this method cannot etch copper foil with a thickness of less than 12 microns, and 8-12 micron porous copper foil is difficult to achieve

Method used

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  • A kind of manufacturing method of porous double-sided smooth copper foil
  • A kind of manufacturing method of porous double-sided smooth copper foil
  • A kind of manufacturing method of porous double-sided smooth copper foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The solution composition of the electrolyte 2 was prepared according to Table 1; the surface of the cathode roller 1 was treated with a sponge polishing wheel so that the roughness Ra of the cathode roller surface reached 0.18um, and then the cathode roller 1 was treated with a polishing brush made of silicon carbide. Polish two laps; use the auxiliary cathode power supply 10 of the raw foil machine as the cathode, use the dilute sulfuric acid solution 11 as the electrolyte to oxidize the surface of the cathode roller 1, and the cathode roller 1 as the anode to form an electroplating circuit. (Copper rod) moves point by point on the cathode roller surface 1, the current value is 60A, and the oxidation time is about 30 seconds. The total area of ​​oxidation points is controlled at about 10% of the surface area of ​​the cathode roller 1, and then the electrolysis of copper is carried out on the cathode roller 1 , prepared a porous double-sided copper foil with a thickness ...

Embodiment 2

[0029] The solution composition of the electrolyte 2 is prepared according to Table 2; the surface of the cathode roller 1 is treated with a sponge polishing wheel so that the roughness Ra of the cathode roller surface reaches 0.2um, and then the cathode roller 1 is treated with a polishing brush made of silicon carbide. Polish two laps; use the auxiliary cathode power supply 10 of the raw foil machine as the cathode, use the dilute sulfuric acid solution 11 as the electrolyte to oxidize the surface of the cathode roller 1, and the cathode roller 1 as the anode to form an electroplating circuit. (Copper rod) moves point by point on the cathode roller surface 1, the current value is 45A, the oxidation time is about 30 seconds, the total area of ​​oxidation points is controlled at about 10% of the surface area of ​​the cathode roller 1, and then the electrolysis of copper is carried out on the cathode roller 1 , prepared a porous double-sided copper foil with a thickness of 9um a...

Embodiment 3

[0033] The solution composition of the electrolyte solution 2 is prepared according to Table 3; the surface of the cathode roller 1 is treated with a sponge polishing wheel so that the roughness Ra of the cathode roller surface reaches 0.2um, and then the cathode roller 1 is treated with a polishing brush made of silicon carbide. Polish two laps; use the auxiliary cathode power supply 10 of the raw foil machine as the cathode, use the dilute sulfuric acid solution 11 as the electrolyte to oxidize the surface of the cathode roller 1, and the cathode roller 1 as the anode to form an electroplating circuit. (Copper rod) moves point by point on the cathode roller surface 1, the current value is 30A, and the oxidation time is about 30 seconds. The total area of ​​oxidation points is controlled at about 10% of the surface area of ​​the cathode roller 1, and then the electrolysis of copper is carried out on the cathode roller 1 , prepared a porous double-sided smooth copper foil with ...

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Abstract

The invention discloses a manufacturing method for porous double-surface light copper foils; and the method is used for manufacturing copper foils for lithium ion batteries. After the surface of a cathode roller is specifically polished, the surface of the cathode roller is locally oxidized by using raw foil machine self equipment; an electrochemical additive with specific formula is separately used; the additive containing PEG, SPS and ZPS is mixed in spraying liquid at the top of the surface of the cathode roller; gelatin is used as an electrolyte background skeleton additive; and when the copper foils are electrically separated, copper grains are continuously separated to the surface of the cathode roller from copper sulfate electrolyte with a certain components, but cannot grow in local oxidized area on the surface of the roller and free organic additive bonding area to form porous copper foils. The method is free of material loss, free of burrs, high in speed, high in efficiency and low in energy consumption and cost, can preferably solve the lithium separation problem of the lithium ion batteries, and improves comprehensive performances; and graphite cathodes are bonded in the porous double-surface light copper foils more tightly, so that the service life of the lithium ion batteries is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery materials, in particular to a method for manufacturing porous double-sided smooth copper foil. Background technique [0002] Double-sided smooth copper foil is currently a common current collector and carrier for lithium-ion batteries. Compared with single-sided smooth copper foil, its consistency is better, and the internal resistance of the manufactured lithium-ion battery is higher than that of the same type of single-sided smooth copper foil resistance low. [0003] However, with the popularity of 3C digital products and new energy vehicles in recent years, the application range of lithium-ion batteries has become wider and wider, and the requirements have become higher and higher. The safety, battery capacity and service life of lithium-ion batteries are all important indicators for evaluating the performance of lithium-ion batteries. The application of porous double-sided smoot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/34C25D7/06
CPCC25D7/0671C25D11/34
Inventor 袁智斌李青海刘进赖见
Owner 甘肃海亮新能源材料有限公司