What is the thickness of aluminum foil and copper foil for lithium battery?

With the rapid development of lithium batteries in recent years, current collectors for lithium batteries have also developed rapidly.

The positive electrode aluminum foil has been reduced from 16um to 14um, then reduced to 12um in previous years, and now many battery manufacturers have already mass-produced 10um aluminum foil and even used 8um thickness Al foil.

The copper foil for negative electrode has better flexibility, and its thickness has been reduced from 12um to 10um, and then to 8um. Up to now, most battery manufacturers are using 6um for mass production, and some manufacturers are developing 5um / 4um thickness Cu foil for lithium battery use.

Since lithium batteries have high purity requirements for the copper and aluminum foils, the density of the materials is basically at the same level. As the development thickness decreases, the areal density also decreases accordingly, and the weight of the battery is naturally getting smaller and smaller, which meets our needs for lithium batteries.

More information at the Aotelec.com.