Ag–Ni Nanoparticle Anchored Reduced Graphene\nOxide Nanocomposite as Advanced Electrode Material for Supercapacitor\nApplication

Abstract

We\nhave reported the electrochemical properties of the nanocomposites\nthat were synthesized by immobilizing nanoparticles of Ag and Ni on\nthe surface of reduced graphene oxide (RGO). The hierarchical structure\nderived from the combination of nanoparticles of Ni, Ag, and RGO in\nthe (Ag_<i>x</i>Ni_{(1–<i>x</i>)})_<i>y</i>RGO_{(100–<i>y</i>)} nanocomposite provides a synergistic effect in\nthe enhancement of supercapacitive performance of the synthesized\nnanocomposite. (Ag_0.50Ni_0.50)₉₀RGO₁₀ showed a high specific capacitance value of 897 F g^–1 at a current density 1 A g^–1 and\nan energy density of 80 Wh kg^–1 at 400 W kg^–1 power density. This nanocomposite also exhibited\n∼77% retention of the initial capacitance even after 4000 cycles.\nTo the best of our knowledge, the electrochemical properties of the\nnanocomposite composed of Ni and Ag nanoparticles and RGO are reported\nfor the first time, and the nanocomposite (Ag_0.50Ni_0.50)₉₀RGO₁₀ demonstrated its excellent\nsupercapacitive performance.