Hyper capacitor with electrodes based on cobalt oxide nanowires : 81 Wh/kg

hypercapa nanowires

Hypercapacitor nanowires with brush-like

The electrodes of high density supercapacitor are usually made from conductive carbon mixed with a transition metal oxide. This mixture is then coated on a collector with a high power electric current conductor such as carbon cloth, copper or nickel. This approach often limits access of the electrolyte to the entire volume of the electrode and the surface boundary where redox reactions can take place.

A team of researchers at the King Abdullah University of Science and Technology (KAUST) in Saudi Arabia led by Husam N. Alshareef therefore used a different approach to improve device performance.

"We designed the electrode with macroporosity to help electrolyte flow and with mesoporosity to increase oxide surface area and increase the redox reaction rate", said Alshareef.

Read more Hyper capacitor with electrodes based on cobalt oxide nanowires : 81 Wh/kg