Polymer Electrolyte Membrane
(PEM) fuel cells used in automobiles use hydrogen fuel and oxygen from the air
to produce electricity.
Most fuel cells designed for use
in vehicles produce less than 1.16 volts of electricity which is far from
enough to power a vehicle. Multiple cells must be assembled into a fuel cell stack. The potential power generated
by a fuel cell stack depends on the number and size of the individual fuel
cells that comprise the stack and the surface area of the PEM.
A fuel cell is a device that uses
hydrogen (or hydrogen-rich fuel) and oxygen to create electricity. Fuel cells
are more energy efficient than combustion engine and the hydrogen used to power
them can come from a variety of sources. If pure hydrogen is used as a fuel,
fuel cells emit only heat and water eliminating concerns about air pollutants
or greenhouse gases.
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