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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The energy density of hydrogen is almost 3 times better than gasoline by mass, it’s the absolute best you can get for chemical energy. That means it’s something like 300 times better than current production batteries. It’s non-toxic and burns to form water which is pretty much harmless. It’s quite easy to produce it from water and electricity.
The problem is to store it you either need huge volume tanks to store the gas, hugely strong and therefore heavy and espensive tanks to store it as a liquid or even just pressurised gas, which are going to explode if they fail. Or you need to freeze it close to absolute zero and keep it there to liquify it. If we could solve these problems then hydrogen would absolutely be the fuel to use but we don’t even know if it’s possible.
Generally disolving it in a liquid or metal and using it to power a fuel-cell looks more promising than burning a tank of hydrogen.
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