Ragone plots

A call to action: Establishing performance metrics for supercapacitors

By Eileen De Guire / November 29, 2011

Ragone plots are useful for comparing electrochemical energy storage devices. The energy and power densities in this plot are weight-based. However, converting to a volume-based plot reveals the difficulties in scaling carbon thin film or low density electrodes for medium or large devices. Credit: Gogotsi; Drexel. Electrochemical capacitors—also called supercapacitors or ultracapacitors—have received a lot…

Read More