Tuesday, January 06, 2009

US Patent 7473411 - Carbon nanotube foam


This patent from Rensselaer Polytechnic Institute teaches a more compacted form of carbon nanotube foam applicable to a variety of high energy storage devices (e.g. fuel cells, Li-ion batteries, supercapacitors). Claim 1 reads:

1. A composition of matter comprising a carbon nanotube foam, wherein the foam comprises a cellular film containing an open cellular structure and the film is located on a substrate which promotes growth of carbon nanotubes in a direction normal to the substrate surface, wherein: the cellular structure of the cellular film comprises rims and depressions; the rims comprise carbon nanotubes substantially aligned in a first direction; and the depressions comprise carbon nanotubes substantially aligned in a second direction substantially perpendicular to the first direction.