Electric double layer capacitor

摘要

Disclosed is an electric double layer capacitor comprising a polarizable electrode layer that contains an activated carbon, a conductive agent, and a binder, wherein an external specific surface area of the activated carbon (defined as a specific surface area calculated from a nitrogen absorption isotherm by a t-plot method by excluding micropores of pore diameter smaller than 20 angstroms), per unit volume of the polarizable electrode layer, lies within a range of 450 to 800 m2/cm3, and a volume based on inter-particle interstices per unit volume of the polarizable electrode layer lies within a range of 0.05 to 0.12 cm3/cm3. The electric double layer capacitor according to the present invention is particularly suited to large current, quick discharge applications.

主权项

1. An electric double layer capacitor comprising a polarizable electrode layer that contains an activated carbon, a conductive agent, and a binder, wherein an external specific surface area of said activated carbon (defined as a specific surface area calculated from a nitrogen absorption isotherm by a t-plot method by excluding micropores of pore diameter smaller than 20 angstroms), per unit volume of said polarizable electrode layer, lies within a range of 450 to 800 m2/cm3, and a volume based on inter-particle interstices per unit volume of said polarizable electrode layer lies within a range of 0.05 to 0.12 cm3/cm3.