The Aerogel Capacitor is an energy storage device.
Charge is stored electrostatically in the electrochemical double-layer formed on the carbon surface.
Carbon aerogels are a special class of open-cell foams. These features make them extremely attractive as electrodes for EDLCs. The above figure shows the construction of a cylindrical Aerogel Capacitor. A porous separator is sandwiched between two aerogel carbon electrodes and wound into a jellyroll. Leads are attached in order to make electrical connections.