Synthesis of Zn-Ni-Co Ternary Sulphide Nanoparticles as Electrode Material for Supercapacitors

Abstract

Nanostructured zinc-nickel-cobalt sulphide has been established as a promising electrode material due to the synergic enhancement effect of cobalt cations replacement with zinc and nickel. Zinc-nickel-cobalt sulphide (ZNCS) nanoparticles were synthesized using a facile hydrothermal route followed by annealing treatment. For a comparative study, nanostructures of nickel cobalt sulphide (NCS) and nickel sulphide (NS) were also synthesized via same method. The synthesized samples were characterized through versatile techniques such as XDR; for structural analysis, SEM for morphological analysis; and for electrochemical studies, CV and GCD tests were run. These tests affirmed the developed ZNCS nanoparticles for supercapacitors. ZNCS nanoparticles exhibit specific capacitance of 2113.173 F g-1 at 5 Ag-1 . Cyclic stability test conducted revealed that ZNCS possesses good electrochemical performance; 99.4 % specific capacitance was retained for up to 1000 charge-discharge cycles.