Name: Aluminum Foil for Battery Manufacturers Suppliers Factory in China
Brand: HWALU
SKU: 135656834

Aluminum Foil for Battery

Battery aluminum foil is commonly used as the positive electrode of lithium-ion batteries. Aluminum accounts for approximately 90% of the strength and conductivity of the electrode. HWALU provides battery-quality aluminum foils for use as high-performance current collectors for Li-ion batteries. We are able to supply a range of alloys and thicknesses from our inventory, cut to the customer's width

Send Inquiry

$NMY3`%CFKA22}D]M%EQEW0

In order to meet the performance requirements of lithium-ion batteries, the best aluminum alloys must be used to produce aluminum foils.

Our aluminum foil product line is the result of years of battery material research and development combined with upstream processes, producing high-quality aluminum alloys specifically developed for the lithium-ion battery market, with rolling technology capable of producing foil coils with thicknesses of 0.01-0.055 mm.

Aluminum Foil for Battery

Specifications of aluminum foil for batteries

Product Name	Alloy	Temper	Item(mm)
Product Name	Alloy	Temper	Thickness (mm)	Width (mm)	Inner Diameter	External Diameter
Battery Shell Aluminum Foil	2135/8011/8021/8079	O,H22,H24	0.01 - 0.055	90 - 1500	/	/

Physical properties of aluminum foil for lithium-ion battery

Alloy	1235	1145	1060	1070
Temper	H18	H18	H18	H18
Tensile strength	≥150N/mm
Elongation	≥1%

Thickness and resistivity of aluminum foil for battery

Thickness/mm	0.006	0.007	0.008	0.009	0.01	0.11	0.16
Resistance/(Ω.m)	0.55	0.51	0.43	0.36	0.32	0.28	0.25

Why do lithium-ion batteries use aluminum foil for the positive electrode and copper foil for the negative electrode?

aluminum foil for batteries

There are 4 reasons:

1. Copper and aluminum foil has good conductivity, soft texture and low price.
2. In lithium batteries, we mainly have winding and lamination processing methods. Compared with winding, the pole piece used to prepare the battery needs to be flexible to ensure that there is no brittle fracture when the pole piece is wound. Copper and aluminum foil is also a soft metal, which is very suitable for production.
3. Copper and aluminum foil is relatively stable in the air. Aluminum reacts easily with oxygen in the air A dense oxide film is formed to prevent further reaction, and this thin oxide film also has a protective effect on the aluminum in the electrolyte. Copper itself is relatively stable in air and does not react in dry air.
4. The positive and negative potentials of lithium batteries determine the use of aluminum foil for the positive electrode and copper foil for the negative electrode, not the other way around. High positive potential, copper foil is easily oxidized under the potential, while aluminum has a high oxidation potential, and there is a dense oxide film on the surface of aluminum foil, which also has a greater impact on the internal aluminum material.