Electrosynthesis of NixCoy on porous cupper and Its Application for High Performance Supercapacitors

Supercapacitors with desirable properties such as high power density (ten times more than batteries), fast charge–discharge processes, and excellent cycle life stability are considered as promising candidates for the next generation of energy storage devices [1,2]. Binary transition metal oxides possess higher reversible capacity, better structural stability and electronic conductivity, and have been widely studied to be novel electrode materials for pseudocapacitors [3]. In this study at first a porous Cu platform was prepared by electroless method and then NixCoy was electrodeposited on this porous Cu substrate. Each step of the electrode preparation process was characterized by SEM, BET, and XRD tests. Electrochemical performances were done by CV, constant current charge/discharge and EIS in KOH electrolyte. CV and galvanostatic charge/discharge shows a capacitance of 229 F/g at scan rate of mV/s, high stability and long cycle life of this electrode as a result we could reach from this combination.