Alternative technologies
Fuel cell
A fuel cell converts chemical energy directly into electricity through an electrochemical reaction rather than combustion. In road vehicles, hydrogen fuel cells use hydrogen from the vehicle and oxygen from the air to generate electrical power. The electricity supplies an electric drivetrain, often with a battery used to buffer power and recover regenerative-braking energy. Fuel cells require a continuing fuel supply. They differ from batteries, which store energy internally and are recharged electrically. G