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.
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.
3 Comments
Lugh@futurology.today · 2 pts · 1y
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 pts · 1y
I'm thinking it's about size. But these graphene advancements have the potential to change everything
SlopppyEngineer@lemmy.world · 2 pts · 1y
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.