Zhang et al. obtained the N, S co-doped graphene aerogels by subjecting the mixture of GO and 2, 5-Dimercapto-1, 3, 4-thiadiazole (DMTD) in different weight proportions to hydrothermal at 200 °C for 12 h and the subsequent freeze-drying and the preparations were performed with different amount of DMTD . Among the three prepared materials, the N, S co-doped graphene aerogel (NSGA-2) has got the maximum SBET of 366 m 2 g -1 along with high specific capacitance of 321 F g -1 at 1 A g -1 in 6 M KOH aqueous solution. The NSGA-2 based symmetric supercapacitor gained an energy density of 10.52 Wh Kg -1 at power density of 10 KW Kg -1 along with greater stability indicating that the 92.8% of the capacitance retained after 6000 cycles. The atomic level of nitrogen and sulphur derived from XPS analyses were estimated to about 2.27 and 2.39%, respectively. The substantial increase in the capacitance was due to the fact that the DMTD is pillared agent that supresses the restacking of graphene sheets through H-bonding and π-π interaction. As a result of the doping efficiency, SBET and the energy storage performance were improved to the greater extent. Ma et al. reported the fabrication of N, S co-doped graphene via mechanochemical ball milling strategy (NSMGO) involving the mixing of Multi layered GO (MGO) and ammonium sulphate in the mass proportion of 1:5 at the rotation of 300 rpm . The elemental analysis revealed that the content of both nitrogen and sulphur were found to be 7.08 and 1.62 wt%, respectively.