From "Eco-friendly artificial muscle fibers can produce and store energy" https://news.ycombinator.com/item?id=42942421 :
> "Giant nanomechanical energy storage capacity in twisted single-walled carbon nanotube ropes" (2024) https://www.nature.com/articles/s41565-024-01645-x :
>> 583 Wh/kg
That's with mechanical twisting though; graphene supercapacitors in general have lower energy density than (micro-) capacitors?
Lifetime ,?
dvh•8mo ago
magicalhippo•8mo ago
It also seema these devices are more 2D than 3D so surface area matters more than volume[2].
[1]: https://blog.knowlescapacitors.com/blog/capacitor-fundamenta...
[2]: https://pubs.acs.org/doi/10.1021/acsomega.2c07549
hulitu•8mo ago
If they can make it precise, maybe they could be use in RF. But i think temperature performance might be a problem.
marcosdumay•8mo ago
If you try to make an integrator out of this thing, you'll have a very bad time.