Composite copper foil (CPF)
The energy density of lithium-ion batteries is closely related to consumers' range anxiety about electric vehicles. Composite copper foil is a kind of composite material with special sandwich structure prepared by magnetic control and water electro plating. Compared with traditional copper foil, the composite copper foil has the advantages of extremely low usage of copper metal and the low density of polymer substrate, which not only reduce the cost of battery, but also significantly improve the energy density of the battery.
Composite Copper Foil Product Performance
| Item | Standard Value | Standard | ||
| Model：CPF-A4520 | Model：CPF-B4520 | |||
| Thickness（μm） | 6.5±0.5 | 6.5±0.5 | ISO 4591:1992 | |
| Square Resistance（mΩ） | 19±2 | 19±2 | GB/T 15717:2021 | |
| Areal density（g/m²） | 21±2 | 21±2 | ISO 4591:1992 | |
| Adhesion（N/15mm） | ≥2 | ≥6 | / | |
| Surface tension（mN/m） | ≥40 | ≥40 | GB/T 22638.4-2008 | |
| Tensile strength（MPa） | MD | ≥130 | ≥180 | GB/T 1040.1-2006 |
| TD | ≥100 | ≥150 | ||
| Break Elongation（%） | MD | ≥2 | ≥20 | GB/T 1040.1-2006 |
| TD | ≥2 | ≥10 | ||
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Data analysis of composite copper foil (CPF)
Electroplating: 1μm/1μm (double-sided) Surface density deviation: within ±5% Measuring point: 10*10=100.
| Electroplating: 1μm/1μm (double-sided) Square resistance deviation: within ±5% Measuring point: 10*10=100.
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