BATTERIES

TYPES OF BATTERIES

• DANIEL CELL

FUEL CELL

DRY CELL (ZINC –CARBON)Leclanche Cell

ALKALINE CELL

LEAD-ACID CELL

• Lead –acid has 6 electrochemical cells, each generating 2V.

Reactions:•ANODE (Negative):Pb → Pb2+ + 2e

The Pb2+ produced will reacts with sulfuric acid to form a precipitate of lead sulfate which builds up on the plates.

Pb2+ SO42-

→ PbSO4

Reactions:•CATHODE (positive):PbO2 + 4H+ + 2e → Pb2+ + 2H2O

The Pb2+ produced will reacts with sulfuric acid to form a precipitate of lead sulfate which builds up on the plates.

Pb2+ SO42-

→ PbSO4

Rechargeable

• Lead-acid batteries are rechargeable. The act as an electrochemical and electrolytic cell.

• By passing electric current back to the cell, Pb2+ can be converted to Pb and PbO2.

2PbSO4 + 2H2O → PbO2 + 4H+ +

2 SO42-