UCLA researchers in the Department of Chemical Engineering have developed carbon particles with high power and energy density for use in battery electrodes and supercapacitors.
Advanced carbon materials present a strong market opportunity for energy related applications. Current state of the art focuses on activated carbon as an inexpensive and widely used material in applications from electrodes to water filters. However, conventional activated carbon offers minimal control over physical and electrical properties. Battery electrodes and supercapacitors need high power and energy density, but these are often inversely related. To increase electrode energy density while maintaining the power density, electrodes with high ion-storage density, excellent electrical conductivity, and effective ion-transport abilities are required.
Professor Lu and coworkers have developed a novel porous carbon particle for energy applications. These carbon particles contain pores with various sizes, providing a 20% increase in surface area that is greater than activated carbon. This increases the ion transport rate, resulting in increased energy density while maintaining the power density. The synthesis is scalable and inexpensive and cycling lifetimes greater than 500,000 lifetimes have been reported.
Material has been prepared and used to make supercapacitor devices.
|United States Of America||Issued Patent||8,784,768||07/22/2014||2012-419|
Activated carbon, aerosols, hierarchical structures, porous materials, graphite, supercapacitors