Lithium Battery Current Collector

Manufactured from high-purity copper via electrolytic deposition and rolling processes, our smooth electrolytic copper foil offers a purity of ≥ 99.99%. It is available in standard thicknesses ranging from 3.5 μm to 12 μm and widths from 260 mm to 1,600 mm. The foil features excellent flexibility, outstanding electrical conductivity, and strong resistance to electrochemical corrosion in anode environments.

This product is widely used as the anode substrate in new energy vehicle power batteries, 3C digital electronics, and energy storage lithium batteries. The ultra-thin design effectively improves battery energy density, while its superior mechanical properties support high-speed coating and calendering processes during electrode manufacturing.

Our carbon‑coated copper foil is produced by uniformly applying a nano‑conductive carbon coating onto high‑purity copper foil. It is available in single‑sided or double‑sided coating options to meet diverse application needs.

The carbon layer significantly reduces interfacial contact resistance between the anode active material and the copper foil, while also enhancing the adhesion of the anode slurry. During charge‑discharge cycling, it effectively mitigates electrode material shedding and copper foil corrosion, thereby extending battery cycle life by more than 30%. This makes the product particularly suitable for advanced applications, including silicon‑based anodes, high‑rate power batteries, and fast‑charging battery systems.

Manufactured from 1235 and 8075 series battery-grade aluminum alloy blanks through a precision rolling process, our smooth aluminum foil is available in standard thicknesses ranging from 8 μm to 50 μm. Featuring significant lightweight advantages, the foil forms a dense passivation film under high-voltage cathode environments, effectively resisting electrolyte corrosion. It serves as the industry-standard cathode current collector for lithium iron phosphate (LFP), ternary lithium (NCM/NCA), and lithium manganese oxide (LMO) battery chemistries. With mature mass-production processes, stable supply chains, and outstanding cost-effectiveness, this product is the reliable choice for high-volume battery manufacturing.

Our carbon‑coated aluminum foil features a conductive graphite carbon layer uniformly applied onto the aluminum foil substrate. This engineered coating effectively addresses key challenges such as poor adhesion of cathode active materials and polarization heating issues under high-current operation. The carbon layer reduces the overall internal resistance of the battery, enhances fast‑charging rate capability, and minimizes the required amount of binder in the electrode formulation.

This product is particularly well‑suited for demanding applications, including grid‑scale energy storage systems, high‑power power batteries, long‑cycle‑life lithium batteries, and sodium‑ion battery cathode assemblies.