Gelled and crosslinked, undried aqueous polymeric composition for supercapacitor electrodes, airgel and porous carbon, and a method for producing the same

摘要

The present invention relates to a process for preparing a gelled and crosslinked, undried aqueous polymeric composition capable of forming a non-monolithic organic airgel by drying, to the aerogel by adding to the non-monolithic porous carbon obtained by pyrolysis of the airgel, To an electrode based on this porous carbon and to a process for preparing this composition and this airgel. The invention is especially applicable to supercapacitors. The gelled and crosslinked and undried composition according to the present invention comprises a resin based at least in part from the polycondensation of polyhydroxybenzene (s) R with formaldehyde (s) F , Comprising at least one water soluble cationic polyelectrolyte P, the composition being such that it is formed from an aqueous dispersion of microparticles of a shear thinning physical gel which crosslinks in an aqueous medium. The composition which has not yet been crosslinked is produced in particular by diluting the prepolymer forming this gel with an aqueous solvent to form an aqueous dispersion of microparticles of said gel.Selection drawing None