Viewing a single comment thread. View all comments

Spudgunhimself t1_iy51i17 wrote

Reply to comment by chmilz in 'Landmark achievement': Rolls-Royce and easyJet hail successful hydrogen jet engine test by Wagamaga

You absolutely have a limit on what you can store with batteries. That limit is 1 electron per lithium atom. Even if you used pure lithium metal as your electrode, that is still three times as heavy as hydrogen per electron.

2

chmilz t1_iy52jss wrote

We're limited to lithium?

1

FalconX88 t1_iy556ch wrote

I mean beryllium would be slightly better, but everything is worse than hydrogen. Hydrogen has the highest (useable) electron to weight ratio.

2

Spudgunhimself t1_iy5sg4c wrote

Well the only lighter reactive element than lithium is hydrogen, so at that point you'd just be making a hydrogen fuel cell 😂

1