4.2.5 Silver oxide cell
Similar in appearance to mercury
cell, silver oxide cell provides a very stable and slightly higher e.m.f., 1.5
volts as compared to 1.35 volts of the mercury cell. Silver oxide cell’s cathode is
made of silver oxide, with potassium or sodium hydroxide, both strong alkalis,
as the electrolyte. The capacity of the silver oxide cell, size for size, is considerably
better than that of the mercury cell.
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| Silver oxide cell |
Because silver is expensive, this cell’s
application is thus limited for applications where size and stability of
voltage is of supreme importance, such as in watches and hearing aids.
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