That's good news, but even an improvement of 10-fold only puts it in the realm of the best batteries today. Given that those are expected to improve, my suspicion is that capacitors will be playing catch-up in energy density for quite some time. Too, "growing a fractal structure" is liable to be very expensive for quite some time.
Who knows - by the time it's economical maybe EEStor will have a working prototype?

Who knows - by the time it's economical maybe EEStor will have a working prototype?