The new 8021 Composite Aluminum Foil demonstrates an excellent combination of safety, energy density and cycle life in the battery field. Aluminum composite foil refers to an aluminized composite film prepared by an evaporation coating process, with materials such as polyethylene terephthalate (PET) as the base material. Its advantages include:
1) Improved safety: The new 8021 Composite Aluminum Foil
The new 8021 composite aluminum foil introduces an organic insulating layer in the middle of the collector, which can provide infinite resistance when thermal runaway occurs, and also has non-flammable characteristics, thus effectively reducing the risk of battery combustion fire and explosion, and significantly improving the safety of the battery;
(2) Improve energy density: Because PET material is lighter, the overall mass of the new 8021 composite aluminum foil is smaller (equivalent to the metal foil).
Specifications of 8021 aluminum foil :
Alloy or not: is alloy
Packing: standard wooden pallet for exporting seaworthy
ead time: about 7-20 days after receipt advance
| Typical alloy | The state of the material | Thickness(mm) | Width(mm) | Length(mm) |
| 8021 aluminum foil | O,H14,H16,H18,H19,H22,H24 | 0.018-0.5 | 100-1 |
Because PET material is lighter, the overall quality of the new 8021 composite aluminum foil is smaller (equivalent to replacing the middle part of the metal foil with a layer of PET), which reduces the weight of the battery and improves the energy density of the battery. According to the data of Lithium Fern, in the case of no increase in overall thickness, the weight of composite aluminum foil is reduced by 50%-80% compared with the weight of traditional calendered aluminum foil collector, and the composite aluminum foil can be thinner, so that the size of the final lithium battery is smaller, and the energy density can be increased by 5%-10%;
(3) Improve cycle life: According to GGLI, the new 8021 composite aluminum foil adopts polymer materials to form layers.
The polymer material used in the formation of layers of circular sponge structure, can absorb the expansion - contraction stress caused by lithium ions embedded in the active material layer of the pole piece generated in the process of charging and discharging out of the lithium ion embedded. This effectively maintains the long-term integrity of the wafer interface, resulting in a 5% increase in cycle life.
