I. Cobalt
II. Graphite
III. Lithium
IV. Nickel
How many of the above usually make up battery cathodes?
(a) Only one
(b) Only two
(c) Only three
(d) All the four
Ans- c
Explanation
Every electric vehicle (EV) is a lithium-ion battery that depends on several key minerals that help power it. The minerals used are
| Mineral | Cell part |
|---|---|
| Aluminium | Cathode, Casing, Current collectors |
| Nickel | Cathode |
| Copper | Current collectors |
| Steel | Casing |
| Manganese | Cathode |
| Cobalt | Cathode |
| Lithium | Cathode |
| Iron | Cathode |
| Graphite | Anode |
Hence, only 1, 2, 4 are correct