5 ms·
At 4.6MJ/kg TNT is fairly low energy density compared to e.g. Jet Fuel at 43MJ/kg. This still makes me think the future may be in fuel cells more than it is in
by brohee 12y ago
At 4.6MJ/kg TNT is fairly low energy density compared to e.g. Jet Fuel at 43MJ/kg.
This still makes me think the future may be in fuel cells more than it is in batteries, but by now we were supposed to have fuel cell powered cellphones and laptops and it didn't came to be.
- ISL 12y agoIf you include the weight of the oxidizer, it's a wash. Oxygen, with mass 16, is pretty heavy compared with carbon's 12 and Hydrogen's 1 when you have to combine two oxygens with each carbon and one with each pair of hydrogens. The big win in "energy density" from normal hydrocarbons is that the oxygen is freely available from the atmosphere.