The same group has reported the comparative studies on hybrid nanocomposites g-C3N4/CuO, and g-C3N4/Co3O4 for supercapacitor applications . The nanocomposites were prepared via direct precipitation method and fabricated the electrode materials in symmetric configuration. The galvanostatic charge-discharge studies were performed to determine the specific capacitance in 1 M KOH solution, which delivered the higher specific capacitance value of 201 F g -1 at a current density of 1 A g -1 , and exhibited the cycling stability of 97% after 6000 cycles with the energy density of 27.9 W h Kg -1 at 1 kW Kg -1 , compared to those obtained from g-C3N4/CuO electrodes (72 F g -1 and 13.2 W h kg -1 ). The authors reported that the pseudocapacitive metal oxide phases enrich the electrochemical properties in the composites, and the reduced cyclic stability in the case of g-C3N4/CuO, and bare g-C3N4 electrodes is due to the agglomeration of the electrode material during the electrochemical process. Zhou et al. reported the synthesis of a novel flower-like polyaniline/graphitic carbon nitride (PANI/g-C3N4) nanocomposite as a supercapacitor electrode material.