Copper foil plays a crucial role in lithium batteries, mainly serving as a negative electrode current collector and conductive material. In the structure of lithium batteries, copper foil is the carrier of the negative electrode active material, responsible for concentrating the current and enabling the battery to output a larger current. Copper foil has good conductivity, flexibility, and resistance to winding and rolling, making it an ideal negative electrode current collector material.

Conductive function

Copper foil, as the electrode substrate, has good conductivity and can ensure the conductivity efficiency of the electrode, thereby improving the overall performance of the battery.

 

Carrying ions

The positive and negative electrode plates of lithium batteries not only need to carry current, but also need to carry the charging and discharging of lithium ions. Copper foil plays a crucial role in this process, capable of carrying lithium ions and maintaining the stability of the battery.

 

Improve stability performance

Lithium batteries operate under harsh working conditions, therefore electrode materials must have good chemical stability. Copper foil has been applied in both the negative and positive electrodes of lithium batteries, and its good chemical stability provides stable performance for lithium batteries. ‌

 

Electrolytic copper foil specifications（4μm-12μm）

Ultra thin double-sided smooth electrolytic copper foil (BCF)

High tensile double-sided smooth electrolytic copper foil (HS-BCF)