Our 25 µm High-Performance Copper Foil Rolls are engineered to meet the rigorous demands of lithium-ion battery manufacturing. With exceptional electrical conductivity, thermal stability, and oxidation resistance, this foil serves as an ideal current collector for cathode and anode designs. It is widely used in electric vehicles, energy storage systems, consumer electronics, and battery R&D. The optimized mechanical properties ensure compatibility with high-speed coating processes and long-term cell performance.
| Property | Specification |
|---|---|
| Thickness | 20 µm |
| Width | 280 mm |
| Length | 131 meters |
| Areal Density | 190–200 g/m² |
| Purity | ≥99.9% Cu |
| Fe Impurity | < 0.0010% |
| Bi Impurity | < 0.00020% |
| Pb Impurity | < 0.0005% |
| Tensile Strength (Room Temp) | ≥294 MPa |
| Elongation (Normal Temp) | 2.5% |
| Tensile Strength @ 180 °C | ≥147 MPa |
| Elongation @ 180 °C | 2% |
| Oxidation Resistance @ 180 °C (1h) | No surface oxidation or discoloration |
| Surface Roughness (Drum Side) | < 0.3 µm |
| Surface Roughness (Matte Side) | < 3.0 µm |
| Surface Tension (Drum Side) | 62 dyne/cm |
| Surface Tension (Matte Side) | 62 dyne/cm |
| Coating Uniformity | Excellent on both sides |
Lithium-ion battery current collectors
Battery research and development
Electric vehicle (EV) battery manufacturing
Energy storage system (ESS) modules
Consumer electronics and mobile devices
Slurry coating and high-speed roll-to-roll processing
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