Facile synthesis of Bi2O3@ MnO2 nanocomposite material: a promising electrode for high performance supercapacitors
Room-temperature successive ionic layer adsorption and reaction (SILAR) electroless chemical method has been proposed for synthesizing Bi2O3, MnO2 and Bi2O3@MnO2 electrode materials over graphite rod. The flake-type Bi2O3 on MnO2 granules increases active sites on preventing the agglomeration of MnO2 to easy and fast electrolyte ions percolation for higher energy storage performance. The X-ray photo-spectroscopy investigation provides the evidence for the formation of the Bi2O3@MnO2 composite matrix. The as-prepared compose electrode material tested for its electrochemical characterizations endows 350 F g−1 of specific capacitance (SC) @10 A g−1 which is better than that of an individual counterpart. Furthermore, the 28 Wh kg−1 energy density at 1395 W kg−1 power density of its symmetric electrochemical supercapatter i.e. summation of battery and supercapacitor performance of the Bi2O3@MnO2//Bi2O3@MnO2 is again superior than that of individuals and also those reported previously for Bi2O3, MnO2 and Bi2O3@MnO2-based symmetric electrochemical storage devices. This enables to light a “CNED” panel designed with 42 LEDs in full-brightness for 45 s, suggesting a commercial potential of the as-obtained electroless Bi2O3@MnO2 composite electrode material in energy storage devices.
Room-temperature successive ionic layer adsorption and reaction (SILAR) electroless chemical method has been proposed for synthesizing Bi2O3, MnO2 and Bi2O3@MnO2 electrode materials over graphite…
Block copolymers (BCPs) have received significant attention as promising candidates for sequestering nanoparticles and fabrication of aligned nanostructures with optimal optical or electrical…
Herein, we demonstrate that copper nickel (CuNi)@reduced graphene oxide (RGO) nanocomposite (NC) is an excellent bifunctional electro-catalyst to oxygen evolution (OER) and oxygen reduction…