 With the world choking on auto exhaust, the zero-emission fuel cell is increasingly seen as its green savior. Hydrogen fuel cells aren’t exactly new. They were invented by Briton Sir William Robert Grove in the 19th century but were not used until the 1960s’ Apollo and Gemini space missions.
Fuel cells can be compared to a car battery in that hydrogen and oxygen are combined to produce electricity. The cells are stackable flat plates, each one producing about one volt, the size of the stack determining the power output.
If pure hydrogen is used as fuel the only emission is clean water, with waste heat as a by-product.
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