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Toys and engineering materials
Toys and engineering materials

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3.2.1 The manufacture of lithium ion batteries

In this activity, you are asked questions on the following video which explains why lithium ion batteries, now used in electric powered cars, are different from their predecessors.

Activity 5 Lithium ion batteries

Timing: Allow about 10 minutes

Consider the following questions as you watch the video, and note down your answers.

  • a.Why is it important to make the lithium metal alloy as pure as possible, and with as uniform a chemical composition as possible?
  • b.What is the role of the electrolyte (transport medium)?
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  • a.When the lithium metal alloy is purer and has a more uniform chemical composition, the battery performance and battery life increase.
  • b.It allows the lithium ions to flow freely between the anode and cathode through the micro-porous layer.

Lithium ion power supplies are not just used in toys; the technology features in mobile phones, handheld tools, electric cars and some household goods. Major advancements in high-capacity rechargeable batteries are expected in upcoming years, which will drive the proliferation of electric vehicles.