A chemical battery can sit on a shelf for a year, and still be good, while capacitors have dielectric leakage that generally limits their time holding a charge to something more like days. 90% ...

A research team at Washington University in St. Louis has developed a technology that can create a capacitor with 19 times higher energy density than commercially available capacitors. According ...

The development could translate into very high energy density super-capacitors making it possible to recharge your mobile phone, laptop or other mobile devices in just a few seconds.

Simple technique puts graphene capacitors on par with lead-acid battery Fabrication could be as simple as making paper.