A fuel cell converts the energy stored in hydrogen into useable power.
The fuel cell uses three main components: two electrodes called an anode and a cathode, and an ion conducting electrolyte. Ions are atoms with negative or positive charge.
There is also a fuel, usually hydrogen, and an oxidant, usually air. The anode is responsible for converting the hydrogen, the cathode for converting the air. The role of the ion conducting electrolyte is very important, as it allows ions to pass between the electrodes but not electrons. The electrons are instead forced to flow outside of the fuel cell – this movement of electrons is electricity.