Microwave synthesis of three-dimensional nickel cobalt sulfide nanosheets grown on nickel foam for high-performance asymmetric supercapacitors.

Author(s) Wang, F.; Li, G.; Zheng, J.; Ma, J.; Yang, C.; Wang, Q.
Journal J Colloid Interface Sci
Date Published 2018 Apr 15
Abstract

A facile and cost-effective microwave method is developed to prepare ternary nickel cobalt sulfide (NiCoS) interconnected nanosheet arrays on nickel foam (NF). When acting as an electrochemical supercapacitor electrode material, the as-prepared NiCoS/NF shows a high specific capacitance of 1502 F gat a current density of 1 A g, and outstanding cycling stability of 91% capacitance retention after 8000 cycles. In addition, a asymmetric supercapacitor (ASC) is composed of NiCoS/NF as positive electrode and activated carbon as negative electrode, which exhibits a high energy density of 34.7 W h kgat a power density of 750 W kgand long-term cyclic stability (83.7% capacity retention after 8000 cycles). Even at a high power density of 15 kW kg, it still remains an energy density of 17.9 W h kg, which is able to light up a light-emitting diode. These findings provide a new and facile approach to fabricate high-performance electrode for supercapacitors.

DOI 10.1016/j.jcis.2018.01.038
ISSN 1095-7103
Citation Wang F, Li G, Zheng J, Ma J, Yang C, Wang Q. Microwave synthesis of three-dimensional nickel cobalt sulfide nanosheets grown on nickel foam for high-performance asymmetric supercapacitors. J Colloid Interface Sci. 2018;516:48-56.

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