I have basic idea of working of hydrogen fuel cell but why just hydrogen? Isn’t there any better or maybe cheaper alternative?
(I know it’s bit complex for but I would appreciate your answers)
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In a post-carbon future, hydrogen is just a fancy and portable way of recharging a battery. (Don’t everybody @ me; this is ELI5.) The problem is, it probably won’t be the obviously best way of doing that in most cases.
It’s better *in theory* than carbon-based fuels for, say, powering a car, because its emissions are less of a problem. Nothing else besides hydrogen or hydrocarbons that combusts comes close in terms of energy density—or at least nothing we can readily construct an engine around. (It’d be pretty neat to see a magnesium-burning car, but not very practical.)
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