Double sided lithium battery copper foil

Double sided light lithium battery copper foil is the core material of the negative electrode current collector of lithium-ion batteries. It is made through precision electrolytic deposition technology and has smooth surface features of low profile and low roughness on both sides. As a conductive carrier and electron transport channel for negative electrode active materials, double-sided copper foil plays a key role in uniformly collecting electrons from the negative electrode active material and conducting them to the external circuit during battery charging and discharging, directly affecting the internal resistance, rate performance, cycling stability, and safety characteristics of the battery.

In principle, the surface roughness and thickness of copper foil are important parameters that determine the performance of lithium battery negative electrodes. The smooth and low roughness surface on both sides can significantly improve the adhesion uniformity and interface contact quality of the negative electrode active material coating, reduce interface contact resistance, decrease local current density concentration, thereby suppressing the risk of lithium dendrite formation and lithium deposition, and enhancing the safety and cycle life of the battery. Ultra thin design is an effective way to improve battery energy density. By reducing the thickness of copper foil, the volume and weight of the current collector in the battery can be reduced, leaving more space for active materials. The double-sided optical copper foil provided by the Advanced Institute can achieve a very thin specification of 6 μ m. It adopts advanced technology to ensure ultra-low roughness on both sides under ultra-thin conditions, with a uniform and smooth surface. It has significant effects in reducing internal resistance, improving the adhesion of active materials, and suppressing lithium deposition.

The core advantage of this product lies in its dual sided ultra-low roughness surface, which balances coating uniformity and interface conductivity, and is suitable for the strict requirements of high energy density battery design for current collectors; The ultra-thin specification effectively reduces the weight proportion of the current collector and improves the overall energy density of the battery; Excellent mechanical properties and surface consistency are suitable for high-speed coating and rolling processes. Advanced Institute (Shenzhen) Technology Co., Ltd. can customize copper foil thickness specifications and coil width according to customer needs, providing high energy density, long cycle life, and high safety negative electrode current collector solutions for power batteries, energy storage batteries, and consumer electronics batteries.