The interest in electric vehicles (EV) has been growing steadily among politicians, researchers, and consumers for sustainable transportation considering its zero-emission and green technology factor. Apart from batteries, various other power sources are being used in EV development, such as fuel cells (FCs), and ultracapacitors (UCs).
Ultracapacitors
Well, batteries and Fuel Cells (FCs) offer large amounts of energy but they are less convenient due to their slow time constants. The UCs, on the other hand, have larger power density and present a higher number of charge/discharge cycles with respect to batteries.