Add time:09/05/2019         Source:sciencedirect.com

Nitrogen-Doped graphene is reportedly said to be engineered in fine-tuning its electrochemical performance to suit the high energy requirements of supercapacitors. In an attempt, nickel Sulfide (cas 18496-25-8) nanoflakes are anchored on the surface of N-doped graphene under hydrothermal environment. XRD data identifies the pristine sample as nickel sulfide of rhombohedral structure. The pristine nickel sulfide in combination with nitrogen-doped graphene is confirmed by Raman and XRD analyses. The surface morphology of the composite reveals nanoflakes of nickel sulfide non-uniformly grown over the 2D sheets of N-doped graphene. The supercapacitor performance of the as-prepared samples is evaluated in the three electrode set up by CV, GCD and EIS studies. N-doped graphene/Nickel sulfide nanocomposite has demonstrated excellent electrochemical activity of specific capacitance of 1120 F g−1 at 1 A g−1 and achieved the cyclic stability of 82% for 3000 charge/discharge cycles. The nanocomposite seems to benefit from the synergistic combination of the nickel sulfide with N-doped graphene to render it with high electrochemical performance metrics.

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