NiTe Nanorods as Electrode Material for High Performance Supercapacitor Applications

Nickel telluride nanorods (Nile NRs) have been prepared by hydrothermal method using ascorbic acid as reducing agent and CTAB as surfactant and characterized by XRD, FE-SEM, HR-TEM and BET. EDX analysis confirms the formation of NiTe NRs. NiTe electrode material for supercapacitor is characterized by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements. A high specific capacitance of 618 F g(-1) at the current density of 1 A g(-1) and the cyclic stability with 75% of its specific capacitance retention after 5000 cycles are achieved. During the cyclic process, the coulombic efficiency is better than 99% indicating a good reversibility of NiTe electrode. The combination of high electrical conductivity, porous structure and the synergic effects of nickel play a significant role to obtain supercapacitor electrodes with excellent performances.