5.4.5 Lithium Cells

Question 1

How do lithium cells work?

Answer 1

• Positive lithium-cobalt electrode
• Negative carbon electrode
• Porous polymer membrane electrolyte (not liquid)

Question 2

Disadvantages with lithium cells?

Answer 2

• Shortage of lithium globally, unsustainable
• Demand exceeds supply
• Lithium dumped in landfills means its lost for future generations
• Lithium can cause fires

Question 3

Advantages with lithium cells?

Answer 3

• Electrolyte isn’t, so disposal isn’t as harmful

Question 4

What half equation reaction occurs at positive electrode?

Answer 4

Li+ + CoO2 + e– → Li+[CoO2]–

Question 5

What half equation reaction occurs at negative electrode?

Answer 5

Li → Li+ + e-