U.S. Department of Energy - Energy Efficiency and Renewable Energy

Advanced Manufacturing Office – Industrial Distributed Energy

Innovative High Energy Density Capacitor Design Offers Potential for Clean Energy Applications

June 15, 2011

Can you imagine a photovoltaic module that’s able to generate and store electricity on its own? Or an electric vehicle (EV) powered by a technology more durable than the advanced batteries in today's EVs? Malvern, Pennsylvania's TroyCap, LLC is using nanolaminate technology patented by Dr. Troy Barbee at the DOE's Lawrence Livermore National Laboratory (LLNL) to design innovative solid-state nanocapacitors that offer the potential to develop cross-cutting clean energy applications like these and others that lower the cost of energy and increase its efficient use.

TroyCap is using an innovative "sputtering" technique the company has developed with the support of LLNL to deposit alternating layers of conductive and insulating materials that are only several atoms thick on a thin metal substrate. Utilizing this process, the company hopes to manufacture what it calls High Energy Density Nanolaminate Capacitors (HEDCAPs) that the company projects will have 500 to 800 times the energy density of current capacitors and 5 to 10 times the energy density of current supercapacitors on the market, allowing them to store more energy. See the Energy Blog post.