| abstract |
The invention relates to a gelled or pyrolyzed carbonaceous composition respectively forming an aqueous polymeric gel or its pyrolyzate in the form of porous carbon, its preparation method, a porous carbon electrode constituted by this pyrolyzed composition and a supercapacitor incorporating such electrodes. The gelled (G 2) or pyrolyzed carbonaceous composition is based on a resin derived at least in part from polyhydroxybenzene (s) R and from formaldehyde (s) F and comprises at least one water-soluble cationic polyelectrolyte P. According to the invention, this composition form in the gelled and uncrosslinked state a rheofluidifying physical gel, and it comprises in the gelled and uncrosslinked state a precipitated prepolymer forming this gel which is the product of a pre-polymerization and precipitation reaction of an aqueous solution of R, F, P and a catalyst. |