The Properties of Battery Aluminium Foil

Aluminum foil for lithium-ion batteries is usually used in the current collector of lithium-ion batteries. Generally, most manufacturers of lithium-ion batteries use rolled aluminum foil as the positive electrode. The thickness of aluminum foil for lithium ion batteries ranges from 10 to 50 microns. The commonly used alloys are 1060, 1050, 3003 and 1235 aluminum.

Lithium batteries usually have cylindrical and square shapes. The inside of the battery adopts a spiral wound structure, and a relatively fine and highly permeable polyethylene film separator is used to separate the positive and negative electrodes.

The positive electrode includes a current collector composed of lithium cobalt oxide (or lithium nickel cobalt manganate, lithium manganate, lithium iron phosphate, etc.) and aluminum foil. The The Properties of Battery Aluminium Foilnegative electrode is composed of graphitized carbon material and copper foil. The battery is filled with organic electrolyte solution, and is also equipped with a safety valve and PTC components (partially cylindrical) to protect the battery from damage in abnormal conditions and output short circuits.

Why do lithium-ion batteries use aluminum foil as the positive electrode of the battery instead of copper foil? Both copper foil and aluminum foil can be used as current collectors. If aluminum foil is used as the negative electrode, due to the active chemical nature of aluminum, aluminum foil will be consumed first when the battery is discharged. , In this case, the battery will be destroyed and the service life of the battery will be reduced. And if the battery aluminium foil is used as the positive electrode of the battery, it can protect the lithium electronics.

A recent study in the lithium-ion battery industry found that the charging and discharging characteristics of the battery can be improved by etching and roughening the surface of the battery aluminum foil. Aluminum foil for lithium-ion batteries will also play an important role in fields such as rechargeable batteries for hybrid vehicles and electric vehicles.

Haomei Aluminum has 10 foil rolling mills with an annual output of more than 50,000 tons of aluminum foil. With advanced equipment, we can ensure the best surface quality. Welcome to leave message below to inquire what you need.