In lithium-ion batteries, the cathode is typically made of materials that include Cobalt, Lithium, and Nickel, depending on the chemistry used.

• ✅I. Cobalt: Used in cathodes like LCO and NMC.
• ❌ II. Graphite: Used in the anode, not the cathode.
• ✅III. Lithium: Core element in cathode materials (like LCO, LFP).
• ✅IV. Nickel: Found in cathode types like NMC and NCA.

Three of the four are used in cathodes.

Alternatively, you can use mnemonic CoLiNi to remember Cathode forming materials.