Norbert
TSLA will win
According to this: Graphene supercapacitor breaks storage record - physicsworld.com the energy density should be 85.6 Wh/kg at room temperature and 136 Wh/kg at 80 °C. Pretty amazing for a device you can make with a common dvd-burner!
That's what they already achieved, I think. They do have bigger plans:
"Our goal is to make a supercapacitor that stores as much energy as the best lithium-ion batteries (for the same weight) but which can still be recharged in less than two minutes," said Jang.
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A post about related research, combining graphene with carbon nanotubes ("quantum wires"):
quantum wires - Page 3
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