Fuel cells represent a radically different approach to energy production, one that could
replace conventional power generators like engines, turbines, and batteries in applications
such as automobiles, power plants, and consumer electronics. Fuel cells, like batteries, directly
convert chemical energy into electric power. But unlike batteries, fuel cells do not need
recharging; instead they use fuel (in the form of hydrogen) to produce power as long as the fuel
is supplied.
The fuel cell needs two substances to generate power: oxygen and hydrogen. Oxygen is readily
available in the air, but pure hydrogen must be supplied from the onboard fuel tank. Fuel cells do
not need to be recharged; they will produce electricity as long as there is hydrogen as a fuel.
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