Electrolyte is a liquid that
conducts electricity as a result of the presence of positive or negative ions.
Electrolytes are molten ionic compounds or solutions containing ions, i.e.
solutions of ionic salts or of compounds that ionize in solution. Liquid
metals, in which the conduction is by free electrons, are not usually regarded
as electrolytes. Solid conductors of ions, as in the sodium–sulphur cell, are
also known as electrolytes.
e.g. acids, alkali, salts dissolved in water, molten salts