5 ms·
That's correct about the specific energy, it's partly related to sodium's atomic mass of 23, vs lithium's atomic mass of 7.
by acyou 4y ago
That's correct about the specific energy, it's partly related to sodium's atomic mass of 23, vs lithium's atomic mass of 7.
- _hypx 4y agoIt's weird that people have failed to notice that hydrogen has an atomic mass of 1. Far better than both of them. To quote what I said elsewhere: > It's bizarre how people refuse to accept that hydrogen fuel cells are technically batteries and have absurdly high energy densities. And if pressed, you usually hear some excuse like poor efficiencies, as if that isn't a powerful justification for pouring billions of dollars into the problem.
- Gibbon1 4y agoYeah hydrogen's energy per kg is definitely an attractive nuisance.
- brokencode 4y agoI don’t think anybody has failed to notice this. Toyota and Honda have both had notable failures bringing Hydrogen fuel cell cars to market despite exciting claims along those lines. I think you’ll have to quote some more authoritative sources to convince people that it could be viable.
- _hypx 4y agoThis ignores the part where battery powered cars have existed for over a century and have "failed." But recent events have changed the needs of society, and now they have "succeeded." People are now claiming that this can never happen again or that no innovation is possible in the future for another type of battery chemistry.
- stetrain 4y agoThe needs of society changed but so did the technology. An EV built in 2020 is a completely different proposition to one built in 1990. > People are now claiming that this can never happen again or that no innovation is possible in the future for another type of battery chemistry. Who is claiming this?
- _hypx 4y agoAnd a fuel cell car today is completely different than one built in 1990 too. > Who is claiming this? You are claiming that. You seem intent to not accept the fact that hydrogen fuel cells are a form of battery technology that can advance.
- stetrain 4y agoI have not said that. I have asked what the avenues of research are that suggest that there are major advancements to be made and are underfunded.
- _hypx 4y agoIt is literally a battery chemistry. It should have broadly the same properties as li-ion batteries. There should not be any challenges, at least not ones that can't be solved via just spending more on R&D. Not to mention that you are consistently implying that this must somehow come at the exclusion of progress anywhere else. That is an absurdity. The point is that we should take this idea seriously alongside other ideas.
- k8wk1 4y agoFuel cells is not a problem. Hydrogen storage is. Hydrogen is just a very nasty material, it leaks through everything, makes steel brittle and requires extreme pressures to store it at meaningful density. Combine the last two problems together and it's easy to see why there are significant technological barriers to hydrogen adoption.
- RhodesianHunter 4y agoCars are most likely the wrong application for the technology given it's explosive potential. Grid connected or off grid storage seem like a far more apt use for the tech.
- Gibbon1 4y agoOne the other hand lithium ion batteries only contain a few percent lithium by weight. So a sodium ion battery is likely 10% heavier. The interesting thing of course is that 'few percent' which means theoretically there is a lot of room for improvement.
- ksec 4y agoAnd if we could somehow do Solid State Sodium Battery, we should be close to the optimal solution.