1235 Aluminum Foil for Lithium Battery

 Aluminum foil battery acts as a positive current collector in lithium batteries due to its good properties. Battery aluminum foil has the characteristics of good conductivity, soft texture, cost advantage, stable performance at high potential.

The above characteristics are well adapted to the requirements of power batteries for current collectors. The power batteries currently used in new energy vehicles include ternary lithium batteries and lithium iron phosphate batteries, both of which are lithium-ion batteries.

Battery aluminum foil has a low weight and cost, and is relatively secretive among the components of lithium batteries. Battery aluminum foil accounts for 5% by weight, followed by positive electrode materials, negative electrode materials, electrolytes, and copper foil.

The cost accounts for about 3% of the total cost of lithium batteries, followed by lithium battery cathode materials, separators, negative electrode materials, copper foil, and electrolytes. The low weight and cost ratio often make people ignore its importance.

To further illustrate the importance of battery aluminum foil, we can compare it with other materials. In terms of chemical properties, the aluminum surface has a dense oxide layer and a high chemical potential, which can prevent the oxidation of the current collector and corrosion by the electrolyte, and at the same time, the lithium insertion reaction (LiAL alloying reaction) will not occur.

In terms of mechanical properties, it is easy to process, has good mechanical strength, can be welded and riveted, and has a soft texture, which can ensure that the pole piece does not break during winding, and has good thermal and electrical conductivity. In terms of cost, it has large reserves. The cost accounts for only 3% of the total cost of lithium batteries and is not a heavy metal or strategic metal resource.

Battery aluminum foil has higher purity. Currently, the battery aluminum foil produced in the market is mainly made of 1060, 1070, 1100 and 1235 aluminum foil. The above alloys all belong to the 1000 series. This series of alloys contains a large amount of aluminum, and the purity can reach more than 99.00%. Since it does not contain other technical elements, the production process is relatively simple and the price is relatively cheap. It is currently the most commonly used series in conventional industries.

Original source: https://www.hmaluminumsupply.com/a/1235-aluminum-foil-for-lithium-battery.html