The Lithium-Ion Cell (Leaving Cert Chemistry): Flashcards

Rechargeable battery using Li⁺ ion movement between electrodes

Most reactive metal in Group 1; small size and light weight

Graphite

Li⁺ ions sliding between carbon layers in graphite

Cobalt dioxide ($\text{CoO}_2$)

Highway for Li⁺ ions; blocks electron passage

Prevents short circuit; allows Li⁺ ions through

Galvanic cell (spontaneously produces electrical energy)

Electrolytic cell (external energy reverses reaction)

$\text{LiC}_6 \rightarrow \text{Li}^+ + e^- + \text{C}_6$

$\text{Li}^+ + e^- + \text{CoO}_2 \rightarrow \text{LiCoO}_2$

Carbon electrode → cobalt oxide electrode

Cobalt oxide electrode → carbon electrode

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