Composition for an organic gel and the pyrolysate thereof , production method thereof , electrode formed by the pyrolysate and supercapacitor containing same

摘要

The invention relates to a non -crosslinked , gelled carbonaceous composition and a pyrolysed composition respectively forming an aqueous polymer gel and the pyrolysate thereof in the form of porous carbon. The invention also relates to the production method thereof , to a porous carbon electrode formed by the pyrolysed composition, and to a supercapacitor containing said electrodes. The gelled, non -crosslinked composition (G2) is based on a resin created at least partly from polyhydroxybenzene(s) R and formaldehyde(s) F and comprises at least one hydrosoluble cationic polyelectrolyte P. According to the invention , the composition forms a rheofluidifying physical gel. A pyrolysed carbonaceous composition according to the invention , consisting of a carbon monolith , is the product of coating , crosslinking , drying then pyrolysis of the non -crosslinked gelled composition , the carbon monolith being predominantly microporous and able to form a supercapacitor electrode having a thickness of less than 1 mm.