Patent ID: 8591857

Claim:
A carbon aerogel formed by producing a dispersion of carbon nanotubes in water by using a dispersing surfactant, producing a foam from the aqueous dispersion of nanotubes obtained by the producing the dispersion of the carbon nanotubes, by swelling the dispersion under an action of a gas, in the presence of a foaming agent and freezing the foam obtained, and then removing the water by sublimation, the formed carbon aerogel resulting from a coagulation of carbon nanotubes in a form of a cellular structure, wherein, the carbon aerogel has a structure with substantially open porosity and which structure comprises both: a macroporosity constituted by cells or macropores having an average size greater than 40 microns; and a super-mesoporosity, substantially located within walls of the cells of the macroporosity, the super-mesoporosity comprising pores having an average size below 60 nm, and the carbon aerogel has an apparent density of less than or equal to 0.25 g/cm 3 .