▎ 摘　　要

NOVELTY - Carbon quantum dot-reduced graphene oxide composite gel comprises reduced graphene oxide, where reduced graphene oxide is a porous network gel, and porous network gel comprises curved nanosheet has thickness of 10 nanometer, surface of the curved nanosheet having carbon quantum dot is attached, and mass ratio of the carbon quantum dots to the curved nanosheet is 0.2-1:1. USE - Carbon quantum dot-reduced graphene oxide composite gel used as anode of the super capacitor and the negative electrode material (claimed). ADVANTAGE - The carbon quantum dot-reduced graphene oxide composite gel has excellent capacitor characteristics, and has good electrical conductivity and excellent cycle stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing carbon quantum dot-reduced graphene oxide composite gel by using hydrothermal method, which involves: (A) mixing grass powder and 1-3 mole/liter sodium hydroxide solution weight ratio of 1:40-60 to obtain a mixed solution, placing mixed solution in a sealed state at 180-220 degrees C for 3 hours to obtain a reaction solution; (B) filtering reaction solution, centrifuging, dialyzing, and drying to obtain carbon quantum dots, mixing 1.5-2.5 gram/liter carbon quantum dot aqueous solution and 1.5-2.5 gram/liter of graphene oxide aqueous solution in the volume ratio of 0.2-1:1; and (C) adding carbon quantum dot aqueous solution, graphene oxide aqueous solution, ultrasonically mixing, and placing in a sealed state at 160-200 degrees C for 2 hours to obtain final product.