Explanation
Most electric vehicles use
lithium-ion batteries, which have
two key electrodes — the cathode (positive electrode) and the anode (negative electrode). The cathode material largely determines the battery’s energy capacity, lifespan, and safety.
Cobalt is widely used in
EV battery cathodes, particularly in chemistries like NMC (Nickel-Manganese-Cobalt) and NCA (Nickel-Cobalt-Aluminium). It
enhances energy density and structural stability.
Lithium is a fundamental element present in all lithium-ion battery cathodes — whether in lithium cobalt oxide, lithium iron phosphate (LFP), or lithium nickel manganese cobalt oxide (NMC). The movement of lithium ions between the cathode and anode is the core mechanism by which the battery stores and releases energy.
Nickel is a key component in high-energy-density cathode chemistries such as NMC and NCA. Higher nickel content contributes to greater energy density, enabling longer driving ranges.
Graphite, however, is the most common material used for the anode (negative electrode) — not the cathode. It stores lithium ions during the charging process but does not form part of the cathode.
Therefore, only Cobalt, Lithium, and Nickel — three of the four elements — typically make up battery cathodes.