What is FuelCell?
| Electrochemical Device Fuel Cells |
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A battery where reactants are supplied to the cell from an external source. The most commonly cited example is the hydrogen fuel cell, in which hydrogen and oxygen are combined, producing electric current and water. An electrochemical device that continuously changes the chemical energy of a fuel (hydrogen) and OXIDANT (oxygen) directly to electrical energy and heat, without combustion. The electrical process causes hydrogen atoms to give up their electrons. It is similar to a battery in that it has ELECTRODEs, an ELECTROLYTE, and positive and negative terminals. It does not, however, store energy as a battery does. Because there is no combustion, fuel cells give off few emissions; because there are no moving parts, fuel cells are quiet. Fuel cells can be used in stationary applications like generating electricity or heating buildings, and for powering vehicles, buses and trains. Fuel cells are at least twice as efficient as gasoline engines. |
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