In the context of electric vehicle batteries, consider the following elements:

Question

In the context of electric vehicle batteries, consider the following elements:

I. Cobalt

II. Graphite

III. Lithium

IV. Nickel

How many of the above usually make up battery cathodes?

1. A. Only one
2. B. Only two
3. C. Only three (Correct answer)
4. D. All the four

Correct Answer

Option C — Only three

Detailed Solution & Explanation

The correct answer is Only three.

Key Points

• EV battery cathodes typically contain Cobalt (NMC/NCA chemistry), Lithium (as lithium oxide/phosphate compounds), and Nickel (NMC/NCA chemistry).
• Graphite is used in the ANODE, not the cathode.
• Therefore three of the four listed elements (Cobalt, Lithium, Nickel) are commonly found in battery cathodes.