What is a fuel cell?

A fuel cell is a device that produces electricity through a chemical reaction, without combustion. Hydrogen fuel cells consist of a hydrogen source, two electrodes – the anode and the cathode, an electrolyte and a catalyst.

How does a fuel cell work?

Hydrogen is supplied to the cell and is split into protons and electrons at the anode. The electrolyte allows the protons to travel to the cathode, but blocks the electrons, forcing them to flow to the cathode by way of an external circuit. Oxygen at the cathode combines with the protons to form water. The flow of electrons through the external circuit creates electricity.