Fuel cell vehicle
Although not always considered electric vehicles, cars that run on fuel cells are actually running on electric power. Fuel cells convert a fuel, such as hydrogen, into electricity through a chemical reaction. This Honda FCX uses a combination of two high-pressure hydrogen tanks and ultracapacitors to move. The hydrogen provides the fuel while the ultracapacitors, which store energy like batteries, provide the power needed during acceleration. This also saves on space. In addition to technical challenges such as storage, fuel cell vehicles are gated by the lack of fueling infrastructure. Some automakers remain committed, though, and have built hydrogen filling stations in certain cities, such as Los Angeles, where the reduced emissions are no doubt welcome.
February 6, 2012 4:00 AM PST
Photo by: Honda
| Caption by: Martin LaMonica
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