show good supercapacitor performance due to the well-dispersed SnO2
nanoparticles on the RGO surface. The optimized SnO2-RGO composite
was also evaluated for use as the cathode in an asymmetric
supercapacitor where the anode is NDG. The obtained asymmetric
supercapacitor exhibits a high specific energy density of 48.7Wh kg−1
at a specific power density of 3125Wkg−1 and excellent electrochemical
stability after 2000 cycles.