The invention discloses a preparation method for a
supercapacitor material MoO2 /
graphene / g-C3N4, and belongs to the technical field of
composite material preparation. The method comprises the following steps: 1), scattering oxidized
graphene into deionized water, employing a
cell pulverizer for smashing, adding
mixed solution composed of a
molybdenum salt precursor and an end-capping
reagent, carrying out the stirring of the
mixed solution, enabling the
mixed solution to be uniform, and obtaining an oxidized
graphene-
molybdenum salt-
sodium salt mixed
solution system; 2), adjusting pH value andthen carrying out the hydro-
thermal reaction in a reaction still; 3), employing water and ethyl
alcohol for cleaning, carrying out the low-temperature
vacuum drying, and obtaining an MoO2 composite oxidized graphene material; 4), mechanically mixing the MoO2 composite oxidized graphene material with a carbon and
nitrogen precursor, carrying out the high-temperature
calcination of the mixture under the protective
atmosphere of high temperature
argon gas, cooling the mixture to the
room temperature, and then obtaining the MoO2 / graphene / g-C3N4
composite material. The method is simple and feasible, and is low in cost. The specific capacity of an obtained
composite material supercapacitor is remarkably enlarged, and the composite material
supercapacitor is good in cyclic charging and discharging stability.