“While lithium accumulators reach an energy density of up to 265 Kilowatt hours (KW/h), supercapacitors thus far have only been delivering a tenth thereof. “
Two errors here. First:
Kilowatt hours is NOT a measure of energy density. It is a measure of total energy. Also known as joules. 1 Joule is equal to 0.000000277777778 kilowatt hour (kWh)
For density, you need to divide the KWh by some volume.
Second, Kilowatt hours is not KW/h. It is KW X h.
What is that in Jiggawatts?................