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Graphene is FINALLY Here - Energy Game-changer? (youtube.com)

submitted 3 days ago by sabreW4K3@lazysoci.al to c/futurology

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[–] Lugh 2 points 3 days ago* (last edited 3 days ago) (1 children)

I get that capacitators are only good for seconds at a time, but given their other advantages, I wonder why people don't build batteries with them, where hundreds or thousands of cells are individual capacitators that get used in sequence.

[–] sabreW4K3@lazysoci.al 2 points 3 days ago (1 children)

I'm thinking it's about size. But these graphene advancements have the potential to change everything

[–] SlopppyEngineer@lemmy.world 2 points 2 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.