this post was submitted on 29 Mar 2025
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Graphene is FINALLY Here - Energy Game-changer? (youtube.com)
submitted 5 days ago by sabreW4K3@lazysoci.al to c/futurology
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[–] SlopppyEngineer@lemmy.world 2 points 4 days ago

Yes, size is the big issue. And that's linked to power density. In the video they say normal battery has 200-400 Wh/kg and these superscapacitors get 7-11 Wh/kg.

That means your phone that lasts a day with the same size in superscapacitors now only lasts an hour. Or the range of an EV goes from 500 miles to 20 miles.