After the single-sided rough copper foil is produced, the copper foil that is roughened on the smooth side alone or at the same time is the double-sided rough copper foil.
At present, the double-sided copper foil is mainly used for collecting the cathode current of lithium batteries to collect (during charging) or release (during discharging) electrons.
Some lithium battery manufacturers prefer to use double-sided rough copper foil, mainly because they think that when the copper foil is rough, it can better contact the electrode material (graphite) and increase the peel strength and conductivity.
