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A comment on Vertically aligned carbon nanotubes triple the density of lithium batteries. Parent comment

Re:Vertically aligned carbon nanotubes triple the density of... by Qwertious on Wednesday October 07, 2020 @08:36AM (#24707549)
Presumably a rocket with a power source separated from its exhaust, and that flings its exhaust material out with an electrically-powered device.

So basically think of a 'reverse railgun'.

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Re:Vertically aligned carbon nanotubes triple the density of... by rocqua on Wednesday October 07, 2020 @10:10AM (#24708381)
I was thinking of https://en.wikipedia.org/wiki/Electron_(rocket) Which uses electric power to pump the fuel and oxygen into the nozzle.
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Re:Vertically aligned carbon nanotubes triple the density of... by HeadsUpHigh on Wednesday October 07, 2020 @03:10PM (#24711551)
That's an ion thruster. They've been around for a while.
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Re:Vertically aligned carbon nanotubes triple the density of... by ben-schaaf on Wednesday October 07, 2020 @10:30AM (#24708599)
Every railgun is a thruster - or gun for that matter: https://what-if.xkcd.com/21/
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