gs1medium
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?
- A.Only one
- B.Only two
- C.Only three
- D.All the four
▶ Answer & Explanation
Correct answer: C. Only three
Battery cathodes in electric vehicles primarily utilize lithium combined with transition metals. Cobalt, nickel, and manganese are common cathode materials, often in combinations like Lithium Cobalt Oxide (LCO), Lithium Nickel Manganese Cobalt Oxide (NMC), and Lithium Nickel Cobalt Aluminum Oxide (NCA). Graphite is typically used as the anode material in lithium-ion batteries, responsible for storing lithium ions during charging.
Source: UPSC gs1 2025