Cycling characteristics of high energy density, electrochemically activated porous-carbon supercapacitor electrodes in aqueous electrolytes
Abstract
Carbon-based supercapacitors typically have low energy density but high cycle lifetime relative to batteries. Surface functionalization can significantly increase charge storage through reversible faradaic reactions at the electrode/electrolyte interface, a phenomenon known as pseudocapacitance. However, pseudocapacitive reactions, if not completely reversible, can contribute to reduced cycling performance. In this letter, we describe an electrochemical activation procedure on porous carbon synthesized via