| abstract |
The invention relates to a gelled, uncured and undried aqueous polymeric composition capable of forming a non-monolithic organic airgel by drying, this airgel, a porous non-monolithic carbon resulting from a pyrolysis of this airgel, an electrode based on this porous carbon. , and a process for preparing this composition and this airgel. The invention applies in particular to supercapacitors. A gelled, crosslinked and undried composition according to the invention, which is based on a resin derived at least in part from a polycondensation of polyhydroxybenzene (s) R and of formaldehyde (s) F and which comprises at least one polyelectrolyte cationic water-soluble P, is such that the composition is formed of an aqueous dispersion of microparticles of a rheofluidifying physical gel crosslinked in aqueous medium. The composition not yet crosslinked is prepared in particular by diluting a pre-polymer forming this gel in an aqueous solvent to form the aqueous dispersion of microparticles of said gel. |