3-8 μ m PET composite copper foil coated with a 30-70 nanometer copper film on both sides

The thickness of PET composite copper foil is generally between 5-10 μ m, which can be used to replace 4.5-9 μ mElectrolytic copper foilPET copper foil is made of 4.5 μ m PET as the base film, and then coated with 1 μ m copper on each side of the base film, forming a 6.5 μ m PET double-sided copper foil.

Its characteristics are heavy weight per unit area, high usage of copper metal, and high thermal conductivity. The thinner the copper foil thickness, the less copper is used per unit cell, which is more conducive to reducing battery costs. It has four performance advantages of high safety, high energy density, long lifespan, and strong compatibility, and can be used as a current collector in the field of lithium-ion batteries. High security:PET composite copper foilWith its unique polymer material, it solves the problem of thermal runaway caused by internal short circuits in batteries and improves the safety of lithium batteries.

PP/PET copper plated filmIt can be reused multiple times, depending on the quality of the mold, as well as the environment and method of mold use. Generally speaking, high-quality PP/PET copper plating can be reused at least 100 times, or even more times. Therefore, if you choose high-quality PP/PET copper film, you can recycle them at least 100 times.

The application of composite current collectors in the positive and negative electrodes of batteries can improve the weight and energy density of the battery. By replacing traditional copper foil with copper plated composite current collectors on top and bottom of 3 μ mPP material, the weight and energy density can be increased by 3.3% at the same thickness. If both positive and negative electrodes are replaced with composite current collectors, the weight and energy density can be increased by 6.1%. Taking PET composite copper foil as an example, replacing traditional 6 μ m electrolytic copper foil with a 1 μ m copper foil 4.5 μ m PET substrate 1 μ m copper foil composite current collector.

At present, many OEMs and car models will prioritize their useComposite copper foil, because it can provide higher electromagnetic shielding effect, better anti-aging performance, lower resistance, higher durability and tensile strength. In addition, it also has lower costs, higher reliability, and higher operability. Therefore, downstream customers will have a strong demand to meet their requirements for high performance and reliability.

There are many methods to increase the number of copper foil cycles. Firstly, high-quality raw materials should be used to ensure the quality of the copper foil; Secondly, the thickness of the copper foil should be controlled to ensure consistency in thickness; Again, it is important to ensure the temperature of the copper foil and avoid temperatures that are too high or too low; Finally, it is important to ensure the humidity of the copper foil and avoid excessive or insufficient humidity. Through the above measures, the number of cycles of copper foil can be effectively increased.