Researchers have developed an experimental capacitor that takes about eight hours (!) to discharge through a thin-filament bulb. They propose using this in electric cars to provide a burst of energy...

Researchers have developed an experimental capacitor that takes about eight hours (!) to discharge through a thin-filament

bulb. They propose using this in electric cars to provide a burst of energy for emergency situations (it would be charged at

a slow rate during normal driving). Describe in general terms the key design elements of this extraordinary capacitor.