Double sided lithium battery copper foil

Advanced Institute Technology's double-sided photovoltaic lithium battery copper foil is a key material in lithium battery manufacturing. The appearance is smooth and uniform in color. It has the characteristics of ultra-thin, high strength, high ductility, and good conductivity. It can effectively reduce the internal resistance of the battery, improve the charging and discharging performance and cycle life of the battery.

Product characteristics

1. Double sided smoothness: Both sides of the double-sided lithium battery copper foil have undergone special treatment, presenting a smooth surface. This smoothness not only improves the conductivity of copper foil, but also enhances its adhesion when combined with other materials.

2. High ductility and tensile strength: Double sided lithium battery copper foil has high ductility and tensile strength, which allows it to withstand significant mechanical stress during battery charging and discharging without easily breaking or deforming.

3. Uniform thickness: Through advanced production technology, double-sided lithium battery copper foil can maintain uniform thickness, which is crucial for improving battery performance and stability.

4. Good conductivity: Copper, as an excellent conductor, makes double-sided lithium battery copper foil have excellent conductivity, which can effectively transmit current and reduce the internal resistance of the battery.

5. Cold and hot expansion resistance: As the negative current collector of lithium batteries, double-sided photovoltaic lithium battery copper foil needs to have good cold and hot expansion resistance to cope with temperature changes that the battery may encounter during use.

Production process

1. Copper dissolution: Reacting electrolytic copper with air (oxygen) and sulfuric acid to produce copper sulfate electrolyte.

2. Electrolyte adjustment: Adjust the concentration and temperature of copper ions, sulfuric acid, etc. in the copper sulfate solution according to the process requirements, and add appropriate additives and brighteners.

3. Electrolysis: The adjusted electrolyte is introduced into an electrolytic cell consisting of a cathode roller and an anode tank. Under the action of a direct current electric field, Cu ² ⁺ ions are electrodeposited on the roller shaped negative electrode (cathode roller) to form electrolytic copper foil.

4. Post processing: The process steps of peeling, cleaning, roughening, curing, passivation, drying, and cutting electrolytic copper foil are carried out to meet the needs of different customers.

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