Dielectric materials for high density capacitive energy storage

Electrical energy storage density in capacitors is a limiting factor for size, cost, and stability over a range of factors (e.g., temperature extremes) for electric vehicles and many other applications of importance to energy efficiency and security. Capacitor technology has been slow to evolve as it is limited by advancements in solid dielectrics with fundamental limitations for the operating electric field. The proposed technology leverages recent advancements in films with porosity at the nanoscale to enable vacuum/gas to operate at extremely high electric fields, enabling higher energy density and stability with respect to temperature, operating voltage, and frequency.