Double PowerTuesday 10th June 2014
Researchers at the University of California, Riverside have developed a grapheme based supercapacitor that doubles the energy and power available when compared to commercially available alternatives. It achieves this through its nanocarbon graphene foam architecture, a development that could mean faster acceleration in electric vehicles and longer battery life in portable electronics.
The researchers found that supercapacitors, an energy storage device like batteries and fuel cells, based on transition metal oxide modified nanocarbon graphene foam electrode could work safely in aqueous electrolyte and deliver two times more energy and power compared to supercapacitors commercially available today.
The foam electrode was successfully cycled over 8,000 times with no fading in performance. The findings were outlined in a recently published paper, in the journal Nature Scientific Reports.
Supercapacitors (also known as ultracapacitors) have garnered substantial attention in recent years because of their ultra-high charge and discharge rate, excellent stability, long cycle life and very high power density.
These characteristics are desirable for many applications including electric vehicles and portable electronics. However, supercapacitors may only serve as standalone power sources in systems that require power delivery for less than 10 seconds because of their relatively low specific energy.
A team led by Cengiz S. Ozkan and Mihri Ozkan at UC Riverside are working to develop and commercialize nanostructured materials for high energy density supercapacitors.
The ability to store an electrical charge, or high capacitance, is critical to achieve higher energy density. Meanwhile, to achieve a higher power density it is critical to have a large electrochemically accessible surface area, high electrical conductivity, short ion diffusion pathways and excellent interfacial integrity. Nanostructured active materials provide a mean to these ends.
It seems to be almost daily that developments that impact on battery life, and particularly EV range and power, are being posted and reported. This does seem to be a booming market.
Tuesday 10th June 2014