An ultracapacitor includes at least one electrode that includes carbon nanotubes. The carbon nanotubes may be applied in a variety of ways, and a plurality of layers may be included. Methods of fabrication of carbon nanotubes and ultracapacitors are provided.
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.