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This is a diagram of the dielectric capacitor research developed by a University of Delaware-led research team. Credit: Kathy F. Atkinson/University of Delaware

Nanotechnology offers new approach to increasing storage ability of dielectric capacitors. In the movie ‘Back to the Future,’ Doc Brown and Marty McFly landed in the future in their DeLorean, with time travel made possible by a ‘flux capacitor.’ Today, capacitors are key components of portable electronics to electric cars, providing fast delivery of energy but poor storage capacity. Researchers now report a new approach to increasing storage ability.

In contrast to batteries, which offer high storage capacity but slow delivery of energy, capacitors provide fast delivery but poor storage capacity...