In the context of electric vehicle batteries, consider the following elements: I. Cobalt II. Graphite III.…

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. Only one
  2. Only two
  3. Only three
  4. All the four

Solution

Cathodes in Li-ion batteries are made with Cobalt, Lithium and Nickel (NMC/NCA chemistries). Graphite is used in the anode, not the cathode. Hence three.

Asked in: UPSC Prelims 2025

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