Engineering Commons^™

Fabrication And Modeling Of Electrochemical Double-Layer Capacitors Using Carbon Nano-Onion Electrode Structures, Fabio Parigi

Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research

Electrochemical capacitors or ultracapacitors (UCs) that are commercially available today overcome battery limitations in terms of charging time (from tens of minutes to seconds) and limited lifetime (from a few thousand cycles up to more than one million) but still lack specific energy and energy density (2-5% of a lithium ion battery). The latest innovations in carbon nanomaterials, such as carbon nanotubes as an active electrode material for UCs, can provide up to five times as much energy and deliver up to seven times more power than today’s activated carbon electrodes. Further improvements in UC power density have been achieved …