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

Title Microwave synthesis of three-dimensional nickel cobalt sulfide nanosheets grown on nickel foam for high-performance asymmetric supercapacitors.
Authors F. Wang; G. Li; J. Zheng; J. Ma; C. Yang; Q. Wang
Journal J Colloid Interface Sci
DOI 10.1016/j.jcis.2018.01.038
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.

Citation F. Wang; G. Li; J. Zheng; J. Ma; C. Yang; Q. Wang.Microwave synthesis of three-dimensional nickel cobalt sulfide nanosheets grown on nickel foam for high-performance asymmetric supercapacitors.. J Colloid Interface Sci. 2018;516:4856. doi:10.1016/j.jcis.2018.01.038

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