International Journal For Multidisciplinary Research

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Synthesis of Niobium Pentoxide and Its Reduced Graphene Oxide Nanocomposite for Enhanced Supercapacitor Applications

Author(s) Priya A Hoskeri, Vinuth Raj T N
Country India
Abstract A simple hydrothermal synthetic route has been developed for the synthesis of perovskite lanthanum aluminate (Nb2O5) and reduced graphene oxide composite (RGO). The synthesized materials have been characterized for its morphology using, XRD, SEM, techniques. The materials are used as electrode materials for supercapacitor applications. Electron microscopic images indicate RGO sheets are densely attached to surface of Nb2O5 with perforated cage like morphology. A high specific capacitance of 751 Fg-1 at a scan rate of 2 mVs-1 was exhibited by RGO/ Nb2O5 hybrid structure electrode when compared to pure RGO (535 Fg-1) and pure Nb2O53 (175 Fg-1) electrodes at the same scan rate using cyclic voltammetry (CV). By using chronopotentiometry (CP), the RGO/ Nb2O5 hybrid structure electrode out stretched specific capacitance of 572 Fg-1 at a current density of 0.5 Ag-1 and able to retain specific capacitance (Csp) of about 427 Fg-1 even at very high current density of 10 Ag-1.RGO/ Nb2O5 composite also possesses an energy density of 179 Wh kg-1 with a maximum power density of 1500 W kg-1. From the Electrochemical Impedance Spectroscopy (EIS), the RGO/ Nb2O5 hybrid structure electrode has shown phase angle close to -90o for frequency up to 0.01Hz, suggesting that the nanocomposite electrode material approached ideal capacitor behavior.
Keywords RGO-Nb2O5 composites; Hydrothermal synthesis; Supercapacitors
Field Physics > Energy
Published In Volume 6, Issue 2, March-April 2024
Published On 2024-04-30
Cite This Synthesis of Niobium Pentoxide and Its Reduced Graphene Oxide Nanocomposite for Enhanced Supercapacitor Applications - Priya A Hoskeri, Vinuth Raj T N - IJFMR Volume 6, Issue 2, March-April 2024. DOI 10.36948/ijfmr.2024.v06i02.19431
DOI https://doi.org/10.36948/ijfmr.2024.v06i02.19431
Short DOI https://doi.org/gts4n3
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