Because the Wired report was not talking about normal batteries, so the normal rules may be irrelevant.
The researchers were playing with lithium ions, carbon fibre and supercapacitors storing energy as electrostatic charge in structures.
This stuff could revolutionise the whole field.
I don't pretend to understand it, and very few people probably would either, but clearly the old rules are outdated in this new field of research.
It's a whole new approach. Fascinating, hope it works.
Bookmarks