Development of ultrathin nanoflakes of Ni-Co LDH films by hydrothermal route for energy storage application

For energy storage systems, high capacitance, long cycling life, superior energy density, and ultrafast charge -discharge rates are important characteristics to meet the energy demands of various modern areas. Recently, the combination of Nickel (Ni) and Cobalt (Co) binary hydroxides has been recognized as a class of new materials due to their excellent electrochemical activity, high capacitance, excellent redox reversibility, spatial structure, and good electrical conductivity. Herein, Ni-Co layered double hydroxides (LDH) nanocomposites were prepared from different Ni-Co precursors under optimized preparation conditions by hydrothermal technique for super -capacitor application. As-obtained Ni-Co LDH exhibits an exceptionally high specific capacitance of 700 F/g was achieved at a current density of 1 A/g. Moreover, the Ni-Co LDH electrode showed a superior specific energy density of 19.69 Wh/kg and a specific power density of 2.8 k/Wkg. These excellent electrochemical results illustrate the potential of utilizing Ni-Co LDH materials for supercapacitor application and provide innovative direction for the development of future high-performance energy storage systems.