What is Fuel Cell?

Fuel cells operate very much like a battery, producing electricity directly from the electrochemical reaction between hydrogen (from a hydrogen-containing fuel) and oxygen in the air. The process creates little or nothing by way of emissions, because no burning or combustion takes place. The only byproducts from the electrochemical reaction are water and heat. In many cases, users of fuel cells also capture the heat that is generated during the production of electricity and put it to practical use, further extending the value of the fuel cell as a clean alternative to traditional forms of energy.