Molten salts and salt solutions also conduct electricity, but in
a different way. If two electrodes are dipped into molten LiF and
then connected to a battery, electrons will flow into the melt at
one electrode, and out of the melt and back to the battery at the
Within the liquid, electric current is not carried by electrons,
but by moving ions. The positive
ions move toward the electrode (called the cathode) where electrons
flow into the melt, and the negative
ions move to the electrode (called the anode) where electrons return
to the battery.
At each electrode a chemical reaction takes place when the carrier
of electric current changes from ions in the melt to electrons in
the connecting wires.