An electrode useful in an energy storage system, such as a capacitor, includes an electrode that includes at least one to a plurality of layers of compressed carbon nanotube aggregate. Methods of fabrication are provided. The resulting electrode exhibits superior electrical performance in terms of gravimetric and volumetric power density.
STATEMENT OF FEDERALLY SPONSORED RESEARCH
 This invention was made with government support under grant DE-AR0000035/0001 awarded by the Unites States Department of Energy (ARPA-E). The United States government has certain rights in the invention.