| abstract |
The invention belongs to the field of material science, and discloses a graphene/porous carbon composite hydrogel, an airgel and a preparation method and application thereof, comprising the following steps: (1) preparing a graphene oxide aqueous dispersion; (2) The porous carbon material is ground, added to the graphene oxide aqueous dispersion, and ultrasonically dispersed; (3) the mixed dispersion of graphene oxide and porous carbon material is reduced, soaked and washed to obtain a graphene/porous carbon composite hydrogel . The invention prepares the graphene/porous carbon composite material through the self-assembly of graphene oxide in the reduction process. The graphene/porous carbon composite material prepared by the present invention has excellent performance and wide application, and realizes the effective combination of graphene and porous carbon material. Combined, it can be used as an electrode of a supercapacitor with small internal resistance, large capacity and good stability. |