High purity battery aluminum foil

8µm Ultra Clean Aluminum Foil

The 8µm Ultra Clean Aluminum Foil is used for batteries undergoes an acidic cleaning process to remove oil residues and impurities during production, with no barrier coating applied. Compared to conventional aluminum foil, it imposes extremely stringent requirements on parameters such as thickness, strength, and surface cleanliness, aiming for the thinnest possible thickness, highest strength, optimal dyna value, and the most pristine surface quality.

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The 8µm Ultra Clean Aluminum Foil serves as high-purity cathode current collector, perfectly matching ternary lithium batteries used in passenger vehicles, consumer electronics and drones.Its ultra-low impurity content avoids side reactions inside cells, making it an ideal base material for high-voltage, long-cycle lithium iron manganese phosphate batteries.The high cleanliness of the foil effectively reduces self-discharge, and it is also widely adopted by manufacturers developing solid-state batteries and energy storage capacitors.

 

 Applicable   battery

LiCoO₂ cathodes | NCM / NCA cathode materials | EVand 3C batteries requiring high energy density

Alloy

AA1100, AA1060, AA1235D

Temper

H18

Aluminum Foil Thickness

8- 20 µm

Aluminum Foil Width

200-1700mm

Surface tension

≥60dyn/cm

Tensile strength

≥230 MPa

Elongation

≥2.5%

 

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Key Bnenefit of 8μm Ultra Clean Aluminum Foil

a. Lower Resistance  No-leak coating process ensures low resistance and efficient electron transfer.

b. Higher purity  Precision cleaning removes oil and impurities for stronger material adhesion.

c. Thinning and lightening   The thickness of positive electrode aluminum foil has progressively decreased from the conventional 12–16 μm to 8 μm. It reduces the battery’s weight and achieving high energy density, particularly in long-range EV and 3C batteries (mobile phones, laptops).

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