Copper foil is used as the current collector at the anode of a lithium-ion battery. In the lithium-ion battery of a mobile phone, current collectors take the form of a foil and must be conductive enough to receive the electrical current.
Carbon, in the form of graphite, is used as a component of the anode. The porous graphite serves as the location where lithium ions migrate to and from when the battery cell discharges and charges.
Lithium ions (Li+) move between the battery’s cathode and anode internally, and electrons move in the opposite direction in the external circuit. This migration is the reason the battery powers the device, because it creates the electrical current.
Cobalt is used as part of an active material (LiCoO2) that is applied to the cathode and acts as a lithium receptor in the electrochemical charge-discharge process.
Aluminum foil is used as the current collector at the cathode of a lithium-ion battery. In the lithium-ion battery of a mobile phone, current collectors take the form of foil and must be conductive enough to receive the electrical current.
