Punched Copper foil
99.99% Copper foil, 10um thick, die punched with 1.0mm diameter holes. Used for reducing collector weight and increasing active material content on the electrode. 1kg roll, 160mm width with 130mm punched.
| Item | Unit | Value | Result |
| Copper content | % | 99.99 | 99.9 |
| Thickness | mm | 0.01 | 0.01 |
| Width | mm | 160 | 160 |
| Punched Width | mm | 130 | 130 |
| Hole size | mm | 1 | 1 |
| Hole distance | mm | 1.5-1.7 | 1.55-1.6 |
| Porosity | % | 40-50 | 48 |
| Tensile strength | Mpa | 156 | 156 |
| Elongation | % | 2.21 | 2.2 |
| Resistivity | μΩ.cm | 1.807 | 1.8 |
| Wettability | Dyne value | 38 | 38 |
| Antioxidant(140C for 15mins) | ok | ||
| Test: Qualified:Yes | |||
| Note: Density of porous surface =0.91* Density of non-porous copper foil surface | |||