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ABSTRACT Polypyrrole composited NiS 2 composite was easily synthesized using a hydrothermal and chemical polymerization technique. Two distinct composites (NS@P1 and NS@P3) were created by varying the polymer precursors stoichiometric ratio. The NS@P3 electrode exhibits a high surface area of 68 m 2 g 1 compared to other NS (46.4 m 2 g −1 ) and NS@P1 (59.3 m 2 g −1 ). The polypyrrole composited electrode exhibits excellent performance in electrochemical behavior. The NS@P3 electrode gives a huge specific capacitance of 1356 Fg −1 at 0.5 Ag −1 compared to other electrode of NS (452 g −1 ) and NS@P1 (874 g −1 ). The NS@P3 electrode's capacitive and diffusive mechanism were analyzed by using the Trasatti method. The assembled ASC‐NS@P3//AC exhibits a high energy density of 68 Wh/kg and a power density of 646 W/kg. The prospective utilization of the NS@P3 composite as energy storage electrode materials for supercapacitor applications is confirmed by the enormous specific capacitance, energy and power delivered by the built ASC device.
Karthik et al. (Wed,) studied this question.