Double-surface-smooth ultra-thin electrolytic copper foil for lithium battery and preparation method thereof

Abstract

The invention discloses a double-surface-smooth ultra-thin electrolytic copper foil for a lithium battery and a preparation method thereof. The formula of the electrolytic copper foil comprises pure water, a copper raw material, sulfuric acid, chromate, hydrogen peroxide, silane, an initiator, a resin base material, a catalyst and a coupling agent, each component is in percentage by mass of 16% of the pure water, 20% of the copper raw material, 15% of the sulfuric acid, 10% of the chromate, 4% of the hydrogen peroxide, 20% of the silane, 3% of the initiator, 10% of the resin base material, 1% of the catalyst and 1% of the coupling agent; the preparation method comprises the following steps of Step 1, selecting raw material; Step 2, mixing raw material; Step 3, electrolyzing copper foil; Step 4, carrying out galvanizing; Step 5, carrying out passivation treatment; and Step 6, drying and rolling the electrolytic copper foil. According to the preparation method, the copper raw material is soaked in the hydrogen peroxide, so that the time of the copper raw material in the sulfuric acid is greatly reduced, and the preparation of copper sulfate solution is facilitated; and an electrolytic cathode roller and an anode seat adopt pure titanium raw materials and lead-antimony alloy correspondingly, so that the cathode roller and the anode base are avoided to react with copper sulfate to generate impurities, and the quality of the copper foil is improved.

Description

technical field [0001] The invention relates to the technical field of copper foil, in particular to a double-sided glossy ultra-thin electrolytic copper foil for lithium batteries and a preparation method thereof. Background technique [0002] With the development of electronic information industry, new energy vehicle industry, wind power generation, solar power generation, high-speed rail, and urban rail transit, the demand for lithium batteries will increase rapidly. High-precision lithium battery copper foil will be widely used in electric vehicles, All lithium batteries, such as handheld electronic devices and energy storage power stations, are used as current collectors for their high energy storage systems. Electronic copper foil is an irreplaceable basic material. In the rapid development of today's electronic information industry, electrolytic copper foil is known as the neural network for electronic product signal and power transmission and communication; the tradi...

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Problems solved by technology

[0002] With the development of electronic information industry, new energy vehicle industry, wind power generation, solar power generation, high-speed rail, and urban rail transit, the demand for lithium batteries will increase rapidly. High-precision lithium battery copper foil will be widely used in electric vehicles, All lithium batteries, such as handheld electronic devices and energy storage power stations, are used as current collectors for their high energy storage systems. Electronic copper foil is an irreplaceable basic material. In the rapid development of today's electronic information industry, electrolytic copper foil is known as the neural network for electronic product signal and power transmission and communication; the traditional electrolytic copper foil process is costly and complex, which is not conducive to processing and production, and the traditional electrolytic copper foil Copper foil copper raw materials react with sulfuric acid at a slow rate and low reaction intensity, which increases the production time. The cathode and anode of traditional copper foil electrolysis are made of general alloy materials, which are very easy to react with copper sulfate, resulting in many impurities in the raw foil produced by electrolysis, reducing copper. At the same time, the single-sided electroplating of traditional electrolytic copper foil is not conducive to user use, and the high thickness of copper foil is easy to bend and damage, which is not conducive to subsequent use; in view of these defects, a double-sided light ultra-thin electrolytic copper for lithium batteries is designed Foils and methods of making them are necessary

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