Lithium Cells (AQA A-Level Chemistry): Quizzes

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Lithium Cells
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What two key features make lithium cells ideal for portable electronics?

High energy density and rechargeability

What material is used as the positive electrode in a typical lithium-ion cell?

Lithium cobalt oxide (LiCoO2LiCoO_2)

What creates the flow of electrons in a lithium cell?

Movement of Li+Li^+ ions between electrodes

What happens to lithium at the negative electrode during discharge?

It is oxidised to Li+Li^+ ions

What is the standard electrode potential for the cathode reaction in a lithium-ion cell?

+0.50+0.50 V

What is the standard electrode potential for lithium oxidation at the anode?

−3.04-3.04 V

What key difference distinguishes rechargeable from non-rechargeable lithium cells?

Reversibility of reactions

Calculate EcellθE^\theta_{cell} if Ecathodeθ=+0.50E^\theta_{cathode} = +0.50 V and Eanodeθ=−3.04E^\theta_{anode} = -3.04 V.

+3.54+3.54 V

What stable voltage does a lithium-ion cell produce during discharge?

Approximately 3.543.54 V

What happens during recharge of a lithium-ion cell?

Li+Li^+ ions move back to graphite electrode

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