Lithium Battery Copper Foil
Copper foil has good electrical conductivity, flexibility, oxidation resistance, machining performance, relatively mature manufacturing technology, low cost, become the first choice of lithium ion battery negative collector.
Suitable for power battery field, such as lithium battery negative collector fluid.
Alloy material, high yield strength, high temperature stability, good moisture-affinity.
| Projects | Unit | Performance parameter | ||||
6μm | 8μm | 9μm | 10μm | |||
Basic weight | g/m2 | 52.5～55.5 | 66～70 | 74.5～79.5 | 83.5～88.5 | |
Width tolerance | mm | ±1.0 | ±1.0 | ±1.0 | ±1.0 | |
Purity (Cu) | % | ≥99.9 | ≥99.9 | ≥99.9 | ≥99.9 | |
Tensile strength | Rm Normalcy | N/mm2 | ≥500 | ≥500 | ≥520 | ≥520 |
Rm 130℃×10min | N/mm2 | ≥500 | ≥500 | ≥520 | ≥520 | |
Elongation | A50mm Normalcy | % | ≥1.0 | ≥1.0 | ≥1.2 | ≥1.5 |
A50mm 130℃×10min | % | ≥1.0 | ≥1.0 | ≥1.2 | ≥1.5 | |
Surface roughness (Ra) | μm | ≤0.20 | ||||
Surface wetting tension | ×103N/m | ≥38 | ||||
Inoxidizability | 140℃×15min | No oxidation | ||||
Copper foil is an important basic material of lithium-ion battery. It not only acts as the carrier of the negative active material, but also acts as the negative electron collection and conduction body, which is used to collect the current generated by the active material of the battery to produce a larger output current. Copper foil has good electrical conductivity, flexibility, oxidation resistance, machining performance, relatively mature manufacturing technology, low cost, become the first choice of lithium ion battery negative collector.
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