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Question 3

Set 2

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QQuestion

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?

OOptions

A
A) Only one
B
B) Only two
C
C) Only three
D
D) All the four

Correct Answer

C) Only three

DDalvoy Solutions

In electric vehicle batteries, typically three elements make up battery cathodes:

I. Cobalt: Yes, cobalt is a key component in many lithium-ion battery cathodes, particularly in NCM (Nickel-Cobalt-Manganese) and NCA (Nickel-Cobalt-Aluminum) chemistries.

II. Graphite: No, graphite is primarily used in the anode (negative electrode) of lithium-ion batteries, not the cathode.

III. Lithium: Yes, lithium compounds like lithium cobalt oxide (LiCoO2) or lithium iron phosphate (LiFePO4) form the base of most EV battery cathodes.

IV. Nickel: Yes, nickel is increasingly used in high-energy density cathodes, especially in NCM and NCA chemistries for better performance and reduced cobalt dependency.

Solution Diagram for Q<built-in function id>

SUPSC Prelims Strategy and Tips

For battery chemistry questions, distinguish between anode and cathode materials. Remember that lithium, nickel, and cobalt are typically cathode materials, while graphite is usually an anode material in lithium-ion batteries.

SUPSC Prelims 2025 Syllabus Analysis

Science & Technology - Energy storage technologies and electric vehicle components

AUPSC Prelims 2025 Question Analysis

Medium to Hard difficulty - requires specific knowledge of battery chemistry and components

MUPSC Prelims 2025 Mock Tests and Practice Papers