3 ms·
Does "less efficient" mean less energy dense, or our current methods for converting its energy to electricity aren't good? If the former, then what does "H2 ca
by teawrecks 6y ago
Does "less efficient" mean less energy dense, or our current methods for converting its energy to electricity aren't good?
If the former, then what does "H2 can be stored in less volume and less weight" mean? I would assume you would want to compare the mass required to store the same amount of energy, in which case it sounds like H2 takes up more space and weight than Li-ion?
If the latter, then isn't it just a matter of improving our technologies? Or is there some law of nature that makes efficient conversion to electricity impractical?
- tonyarkles 6y agoIt’s admittedly been a while since I’ve looked at it, but I recall that the creation of H2 using existing processes takes quite a bit more energy than you ultimately extract back from it. For example, electrolysis of H2O to H2 is a pretty lossy process (I think around 60-70% of the input power is used to break the H2O bond and the other 30-40% is released as heat).