How thick is aluminum foil?

How thick is aluminum foil? Aluminum foil generally refers to rolled products with a thickness of less than 0.2mm and a rectangular cross-section, which has the advantages of light weight, air-tightness and good wrapping ability.

Currently, the thickness of battery foil is between 8-15μm, but the mainstream aluminum foil thickness in electric power battery and energy storage is 13-15μm.

Aluminum foil can be divided into double-zero foil, single-zero foil and thick foil according to its thickness. The thickness of thick foil is 0.1-0.2mm; single-zero foil refers to aluminum foil with thickness of 0.01mm and less than 0.1mm/; double-zero foil refers to the foil with two zeros after the decimal point when the thickness is measured in mm, and the thickness is usually less than 0.01, i.e., the thickness of the foil is in the range of 0.005~0.009mm (5-9 microns). Among them, the thickness range of aluminum foils for batteries is close to that of single-zero and double-zero foils, and technically it is also close to that of aluminum foils.

Industry	Aluminum Foil
	Thick	Single-zero	Double-zero
Home Appliance	Air conditioning foil, central air conditioning ducts	Central air-conditioning ventilation ducts	Central air-conditioning ventilation ducts
Packaging	Bottle and can packaging	Packaging for pharmaceuticals, bottles and cans, etc.	Packaging for food, tobacco, pharmaceuticals, cosmetics, etc.
Construction	Aluminum-plastic tubes, decorative panels	Insulation and thermal insulation materials, decorative panels	Insulation and thermal insulation materials
Power electronics	Cable box, electronic gasket	Electrolytic Capacitors, Power Capacitors	Power Capacitors
Transportation	Composite foils, decorative materials for vehicles	New energy lithium batteries, decorative materials for automobiles, fuel tanks, honeycomb materials, etc.
Household	Food and Gift Packaging	Household food packaging, utensils
Others	Industrial insulation and shielding materials, aerospace aluminum foil, aluminum foil pellets, magnetic materials, cable sheathing and other composite materials.

The above table covers the answer to the question How thick is aluminum foil and their applications. Due to the development of the new energy vehicle industry, the demand for battery foil has doubled and risen exponentially, which also pushes the thickness requirement of aluminum foil to be thinner.

New Energy Field: Battery Aluminium Foil Price& Development

The composite collector used in new energy field is a new type of collector material compounded with polymer material and metal, including two kinds of composite copper foil and composite aluminum foil, which is highly concerned by new energy industry chain enterprises due to the advantages of high safety, high specific energy, low cost, long life and strong compatibility, and has become one of the emerging important tracks for the development of new energy industry materials.

In the field of sodium batteries in the last two years, composite aluminum foil application prospects are even broader. Since sodium ions do not form an alloy with aluminum, in addition to the positive electrode, the negative electrode of the battery can also be used as a collector of aluminum foil, reducing the cost and weight of the battery. It is estimated that 1GWh lithium batteries need about 400 tons of aluminum foil, only used for positive electrode materials, due to the sodium ion battery positive and negative electrode collector use aluminum foil as a carrier, the amount of aluminum foil compared to lithium-ion batteries close to double.

1GWh sodium batteries need about 800 tons-1,000 tons of aluminum foil. The global demand for sodium-ion battery in 2025 may reach 229GWh, corresponding to the demand for aluminum foil for sodium-ion battery is about 206,100 tons.

The production process of composite aluminum foil is to deposit directly on the surface of organic film by vacuum evaporation method. Compared with composite copper foil, the production process of composite aluminum foil is simpler.

Aluminium foil price: Battery foil has a long production and capacity construction cycle, generally around 1.5-2 years. The current battery foil production capacity is temporarily difficult to meet the growth of downstream demand, although the whole market power battery midstream materials have a downward trend in price, but the aluminium foil price and processing fee will not have a significant decline, especially thin battery foil.

Manufacturing requirements

Aluminum foil for batteries has significantly higher requirements than conventional aluminum foil in all aspects.

• Higher cleanliness, the aluminum coil must not be mixed with any debris, dust, especially iron chips;

• The uniformity of the anode material coated on the surface of aluminum foil have a great impact on the durability of lithium-ion batteries.

The uniformity of the anode material coated on the surface of aluminum foil will greatly affect the service life of lithium-ion battery and its durability, so the layout should be controlled below 10I;

• High mechanical performance requirements, in order to ensure that the purity of aluminum remains unchanged, is required to be high tensile and high elongation, the elongation ≥3%;

• Thickness and pinhole requirements are high, the thickness difference is required to be ≤ ± 3%, but the reduction of aluminum foil thickness will result in an increase in the number of pinholes, increasing the possibility of tape breakage caused by calendering process, which seriously affects the quality of the foil, which in turn puts forward higher requirements for the aluminum foil

• Surface requirements are high, the surface of aluminum foil shall not have dark surface bright spots, black oil lines, pockmarks and other surface defects.

• This is directly related to the coating uniformity and compaction process of lithium-ion battery, which requires high cleanliness of aluminum foil machine and environment cleanliness.

• High dyne value requirement, in order to ensure the coating quality, the surface dyne of aluminum foil should reach 31 dyne or above.

Ultra-thin, high strength and flexibility, high wetting tension, etc. have become the development trend of aluminum foil.

Yongsheng Aluminum Foil Advantages

We Focus on Aluminum Processing. Main Products: Aluminum Foil, Aluminum Sheet and Strip, Carbon Coated Foil Batteries, Capacitors, Food, Beverage, Cigarettes, Pharmaceutical Packaging and others.

• Excellent cleanliness, few pinholes
• No dark surfaces, bright spots, black lines or pockmarks on the surface.
• Uniform thickness, high tensile strength and elongation, high dyne value.