Journal of Materials Science

, Volume 54, Issue 8, pp 6361–6373 | Cite as

Asymmetric supercapacitor device performance based on microwave synthesis of N-doped graphene/nickel sulfide nanocomposite

  • B. Joji Reddy
  • P. VickramanEmail author
  • A. Simon Justin
Electronic materials


Nickel sulfide (NiS) and Nitrogen-doped Graphene/NiS nanocomposite (NG/NiS) are prepared via green microwave synthesis route as electrode materials for supercapacitors. As-prepared materials are examined using XRD, Raman, XPS, SEM, EDX and elemental mapping characterization techniques to obtain the information regarding their structure, complex formation, morphology and elemental presence. The electrochemical investigations like CV, GCD and impedance analysis suggest that NG/NiS is an excellent electrode material with a specific capacitance of 1467.8 F g−1 at 1 A g−1. In asymmetric configuration of NG//NG/NiS, with polyurethane foam as the separator soaked with 6 M KOH and graphite sheet as the current collector, the composite produces the energy density of 66.6 Wh kg−1 at a power density of 405.83 W kg−1 with a cyclic stability of 86.6% for 5000 cycles. The high electrochemical performance is because N-doped graphene houses NiS nanoflake clusters, and together they demonstrate an impressive performance for supercapacitors.


Compliance with ethical standards

Conflict of interest

The authors hereby declare that there is no conflict of interest.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Solid State Ionics Lab, Department of PhysicsThe Gandhigram Rural Institute-DUGandhigramIndia

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