Charge Storage Device Architecture For Increased Energy And Power Density

Researchers at UCLA have developed an electrochemical capacitor that provides superior energy and power densities through utilizing nanocrystal porous films that provide high surface area and enhanced ionic motion.

Electrochemical capacitors are energy storage devices that provide a high-power and lightweight alternative to rechargeable industrial batteries and backup power supplies. Furthermore, the capacitors exhibit high cycling efficiency, fast recharge capability, and reliable cold temperature performance. However, current electrochemical capacitors are limited by their relatively low energy densities.

Researchers at UCLA have developed a method that significantly increases the energy density of electrochemical capacitors. High surface area and facile ion motion is attained through fabricating nano-crystalline films with three-dimensionally interconnected porosity. As a result, the charge capacity is increased, without compromising the high charging/discharging rates of electrochemical capacitors.

Mesoporous nanocrystal-based films have been synthesized and the electrochemical capacitors characterized.