Lithium Battery Aluminum Foil

Lithium battery aluminum foil is one of the key raw materials for lithium-ion batteries. Refined from high-purity aluminum alloys such as 1235, 1060 and 8079, it offers excellent conductivity, ductility and chemical stability. As the battery’s positive electrode current collector, its performance directly affects energy density, cycle life and safety.

Product Specifications

Thickness: 8–20 μm
Width: 250–1650 mm
Alloy: 1235/1060/1100 and similar
Surface roughness: Ra ≤0.2 μm

Core Advantages

High conductivity: volume resistivity ≤3.5×10⁻⁸ Ω·m, reducing internal resistance
Excellent ductility: elongation ≥2.5%, preventing electrode breakage during processing
Stable performance: resistant to electrolyte corrosion, ensuring cycle life
High surface quality: high cleanliness, free from pinhole defects

Technical Data

Tensile strength: 120–180 MPa
Elongation: ≥2.5%
Pinhole count: ≤5 per m²
Thickness tolerance: ±3%