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Electrolytic copper foil and preparation process thereof

A technology of electrolytic copper foil and glossy surface, applied in the electrolytic process, electroforming and other directions, can solve the problems of easy warping and deformation of electrolytic copper foil, and achieve the effect of reducing internal stress and small stress difference

Inactive Publication Date: 2021-04-23
江苏箔华电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide an electrolytic copper foil and its preparation method to solve the problem that the electrolytic copper foil is easy to warp and deform in the prior art

Method used

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  • Electrolytic copper foil and preparation process thereof

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Embodiment Construction

[0019] In order to clearly and completely describe the object, technical solution, and advantages of the present invention, the embodiments of the present invention will be further described in detail below. It should be understood that the specific embodiments described here are part of the embodiments of the present invention, rather than all embodiments, and are only used to explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. All other embodiments obtained under the premise of creative work all belong to the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", " The orientation or positional relationship indicated by "bottom", "side", "vertical", "horizontal" and so on are only for the convenience of describing the present invention and simplifying t...

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Abstract

The invention discloses an electrolytic copper foil and a preparation method thereof, and relates to the field of copper foil manufacturing process. The electrolytic copper foil is of a porous structure and is provided with a glossy surface and a rough surface, wherein the proportion of the pore sectional area on the glossy surface to the total area of the glossy surface is a, the ratio of the pore sectional area on the rough surface to the total area of the rough surface is b, and a and b satisfy the following relation: 0<=b-a<=0.2. According to the electrolytic copper foil and the preparation method thereof, by controlling the difference between the pore sectional area of the glossy surface and the pore sectional area of the rough surface, it is guaranteed that the stress difference between the glossy surface and the rough surface of the electrolytic copper foil is small, the internal stress of the electrolytic copper foil is reduced, and the warping degree of the electrolytic copper foil is controlled to be 5 mm or below.

Description

technical field [0001] The application relates to the field of copper foil production technology, in particular to an electrolytic copper foil and its preparation technology. Background technique [0002] Copper foil is an important component material of lithium-ion batteries. Copper foil manufacturing processes include electrodeposition and calendering. The production of copper foil by electrodeposition is widely used because of its simple process and low cost. Copper foil is used as a current collector material in lithium-ion batteries to carry negative active materials and collect electrons to form a large current. With the development of electronics and new energy industries, the market demand is increasing year by year. In order to meet the needs of lithium-ion batteries to reduce weight, reduce resistance, increase capacitance and energy density, and reduce costs, the proportion of ultra-thin copper foil with a thickness of less than 9 μm in the production capacity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/04C25D3/38
CPCC25D1/04C25D3/38
Inventor 赵永鹏
Owner 江苏箔华电子科技有限公司