If the new material can store 5 times the energy of current Li-ion batteries, why would it only about double the range of electric cars using it?
Anyway, sounds like good stuff. I’m not opposed to electric vehicles in principle, it’s just that so far their practicality, due to range, charging times, charging infrastructure, electrical supplies (all this electrical power will have to come from somewhere), etc have made me skeptical of their utility and “greenness.”
‘Power’ is a logarithmic function.
30 dBm of power is 1 Watt, 33 dBm of power is 2 Watts, 36 dBm is 4 Watts, etc.
One possibility might be that the new design is significantly heavier than the old design and can't be scaled down. You might end up with additional range but carrying a much heavier payload.