Abstract
The present work describes the deposition of coppersulfide (Cu2S) nanoflakes onto reduced graphene oxide (rGO) on three dimensional (3D) nickel foam byinexpensive chemical methods. The nanohybrid structure exhibitedexcellent surface area (41.67m2g−1) with a porous structure (pore size 22.8nm) and good electrical conductivity with a maximum specific capacitance of 1264Fg−1 at a scan rate of 5mVs−1. The Cu2S@rGOcomposite exhibits a significantlyhigher specific capacitance. The nanohybrid structure showed outstandingcycling stability of 94 % after 10000cycles. The asymmetric supercapacitor (ASC) device, Cu2S@rGO//rGO exhibited a maximumspecific capacitance of 135Fg−1 withhighenergy and power densities of 50Whkg−1, and 7000Wkg−1, respectively.
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