Co ions doped NiTe electrode material for asymmetric supercapacitor application

NiTe:Co nanoparticles supported on nickel foam are successfully synthesized using one step hydrothermal method. Electrochemical performances of NiTe:Co in 3 M KOH are investigated. Results show that specific capacitance of the electrode formed by using NiTe:Co is significantly enhanced and the highest specific capacitance is 1645.6 Fg(-1) at 1 Ag-1, which higher than NiTe electrode (872.7 Fg(-1)). Moreover, the NiTe:Co//AC device also delivers a higher energy density of 36.8 Wh kg(-1) than NiTe//AC device (24.4 Wh kg(-1)) at almost the same power density. The superior electrochemical properties demonstrate that the Co doped NiTe is promising as electrode material for supercapacitors in energy storage. (C) 2018 Elsevier B.V. All rights reserved.