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Preparation method of high-ductility copper foil

A technology of ductility and copper foil, which is applied in the field of preparation of high ductility copper foil, can solve the problem that the ductility and tensile strength of copper foil cannot meet the development needs and optimization of lithium battery light and thin, and achieve the reduction of free movement space, High production stability and the effect of increasing fluid volume

Inactive Publication Date: 2021-08-13
JIUJIANG TELFORD ELECTRONICS MATERIAL CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

On the other hand, at present, the ductility and tensile strength of many copper foils cannot meet the development needs of thinner and lighter lithium batteries, because the formulation process of copper foil manufacturing fails to optimize the crystal structure of copper foil

Method used

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  • Preparation method of high-ductility copper foil
  • Preparation method of high-ductility copper foil
  • Preparation method of high-ductility copper foil

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0029] Such as figure 1 Shown, a kind of preparation method of high ductility copper foil, comprises the following steps:

[0030] Step S1: adding cathode copper plates or copper wires with a purity of ≥99.95% into the copper-dissolving tank 1 containing sulfuric acid, blowing in high-temperature air with a screw fan, and dissolving copper to prepare a copper sulfate solution;

[0031] Step S2: the copper sulfate solution enters the electrolyte tank 2 for storage through multi-stage filtrati...

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Abstract

The invention discloses a preparation method of a high-ductility copper foil. The preparation method comprises the following steps that S1, a cathode copper plate or copper wire with the purity larger than or equal to 99.95% is added into a copper dissolving tank 1 containing sulfuric acid, high-temperature air is blown by using a screw fan, and copper is dissolved to prepare a copper sulfate solution; S2, the copper sulfate solution is subjected to multi-stage filtration and enters an electrolyte tank 2 to be stored; S3, an additive is added into the electrolyte tank 2; and S4, the copper sulfate in the electrolyte tank 2 is conveyed to a foil generating machine 3 for electrolytic foil generating. According to the preparation method, the concentration and temperature of copper acid in the electrolyte are more optimized and reasonable, the complexing effect is more prominent after a polymer thickening agent is added into the additive, and copper foil crystal bond combination is firmer, so that the characteristic of high ductility of the copper foil is achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of electrolytic copper foil, in particular to a preparation method of high ductility copper foil. Background technique [0002] From the perspective of the industrial chain distribution of lithium battery copper foil, lithium battery copper foil is mainly used for negative electrode collectors of lithium batteries, and lithium batteries are mainly used for new energy vehicle power batteries, 3C digital and energy storage systems. As the demand for power batteries continues to increase, the global production of copper foil for lithium batteries is also increasing year by year. The simplest lithium-ion battery consists of a positive electrode, a negative electrode, a separator, an electrolyte, and positive and negative current collectors. Metal foil (copper foil, aluminum foil) is the main material of lithium-ion batteries. Its function is to gather the current generated by the active materials...

Claims

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Application Information

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IPC IPC(8): C25D1/04C25D3/38C25D7/06
CPCC25D1/04C25D3/38C25D7/0614
Inventor 董朝龙江泱范远朋
Owner JIUJIANG TELFORD ELECTRONICS MATERIAL CO LTD
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