Composite aluminum foil is a new-type of battery current collector, which has thinner aluminum film, overall lighter weight, and higher safty during penetration expeirment compared to the conventional rolling aluminum foil.
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Product name |
PET Composite Aluminum Foil |
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Testing items |
Unit |
Norm value |
Testing standards and methods |
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Areal density |
g/c㎡ |
13±0.5 |
Sampler, balance |
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Thickness |
um |
8.0﹢1/0 |
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Width |
mm |
280 |
Steel ruler |
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Square resistance |
MΩ |
40±3 |
Four Probe Square Resistance Meter |
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Resistivity |
Ω/m |
≤4*10-8 |
Four Probe Square Resistance Meter |
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Plating purity |
% |
99.35 |
Metal Detector |
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Tensile Strength |
MD |
MPa |
≥240 |
Tensile tester |
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TD |
≥1800 |
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Break elongation |
MD |
% |
≥3% |
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TD |
≥3% |
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Wettability |
Dyne value |
≥32 |
Dyne pen |
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Antioxidant |
150℃ 10min |
/ |
No color change |
Oven |
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150℃ 10min |
Not melt |
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Adhesion |
/ |
Tape No. 681 does not fall off |
3M tape |
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Pinholes |
Number |
No >500μm pinholes |
Metallographic microscope |
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Appearance and storage conditions |
The foil surface is smooth and flat; no interlayer folds; no indentation, bruises, scratches, uniform color, no corrosion, no oil stains, no black spots, smooth cut edges, and no obvious burrs. Storage temperature ≤25°C, temperature ≤65°C, avoid direct sunlight and chemical corrosion. |
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