Enhanced\nPerformance of Supercapacitors through Controlled\nGrowth of Fe–Co–Ni Nanosheets

Abstract

The utility of supercapacitors in\nvarious applications has recently\nreceived significant attention owing to the cognizance of high electrochemical\nactivity of various combinations of ternary metal compounds. In this\npaper, we present a strategy for utilizing Fe–Co–Ni\nas an electrode material in supercapacitors. To enhance the electrochemical\nperformance of the proposed ternary metal compound, we implemented\ncontrolled pulse deposition during the electrochemical process and\nanalyzed the structural characteristics of the deposited Fe–Co–Ni.\nDistinct structural variations were observed based on the waveform\nand number of pulse repetitions employed during the manufacturing\nprocess. The specific capacitance of the ternary metal compound reached\na maximum of 432.3 F g^–1 at a current density of\n0.1 A g^–1 when 700 pulses were applied. In addition,\nit exhibited a capacitance retention rate of 72% at 1.5 A g^–1, with excellent cyclic stability, retaining 81% of its initial capacitance\nafter 10,000 cycles. Our findings highlight the potential of this\ninnovative electrochemical plating strategy for practical energy storage\ndevices.