LiCoO2 is the cathode active material, and it has alternating layers of Cobalt, Oxygen and Lithium ions. During the charging process, the Li + ions get deintercalated from the LCO structure and electrons are released. Thus, oxidizing Co 3+ to Co 4+ . During the discharging cycle, the Li + ions shuttle back into the lattice and Co 4+ is reduced to Co 3+ by gaining electrons. Aluminium is used as the current collector for the cathode . The major commercially available cathodes for LIB include Lithium Cobalt Oxide , Lithium Manganese Oxide , Lithium Nickel Manganese Cobalt Oxide , Lithium Nickel Cobalt Aluminium Oxide and Lithium Iron Phosphate .