Tantalum pentoxide functionalized nitrogen-doped reduced graphene oxide as a competent electrode material for enhanced specific capacitance in a hybrid supercapacitor device

A simplistic hydrothermal method has been established for the fabrication of Nitrogen-doped reduced graphene oxide with tantalum pentoxide to generate a nanocomposite; NRGO-Ta2O5. Synthesized Ta2O5, NRGO, and NRGO-Ta2O5 nanocomposite have been subjected to morphological and structural evaluation by...

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Bibliographic Details
Published in:Journal of alloys and compounds Vol. 861; p. 158572
Main Authors: Vinuth Raj, T.N., Hoskeri, Priya A., Muralidhara, H.B., Prasanna, B.P., Yogesh Kumar, K., Alharthi, Fahad A., Raghu, M.S.
Format: Journal Article
Language:English
Published: Elsevier B.V 25.04.2021
Subjects:
Asymmetric supercapacitor device
Characterization
NRGO
NRGO-Ta2O5 nanocomposite
Ta2O5
Characterization
Asymmetric supercapacitor device
NRGO
Ta2O5
NRGO-Ta2O5 nanocomposite
ISSN:0925-8388, 1873-4669
Online Access:Get full text
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Summary:A simplistic hydrothermal method has been established for the fabrication of Nitrogen-doped reduced graphene oxide with tantalum pentoxide to generate a nanocomposite; NRGO-Ta2O5. Synthesized Ta2O5, NRGO, and NRGO-Ta2O5 nanocomposite have been subjected to morphological and structural evaluation by different analytical, spectroscopic, and electrochemical characterizations. The Characterization result confirms the doping of N to RGO and the formation of its recombination with Ta2O5. NRGO, Ta2O5 and NRGO-Ta2O5 nanocomposite has been evaluated for its electrochemical performances in supercapacitor applications by using various electrochemical techniques. The enhanced specific capacitance of 808 Fg−1 has been accomplished for NRGO-Ta2O5 nanocomposite compared to 179 and 535 Fg−1 for Ta2O5 and NRGO, respectively, at 2 Ag−1 current density using cyclic voltammetry (CV) technique. Chronopotentiometry technique has also been evaluated and observed the specific capacitance of 383 Fg−1 at a current density of 2 Ag−1. Further, NRGO-Ta2O5 nanocomposite has been used as an anode material in combination with activated carbon as cathode and fabricated asymmetric device found to attain a specific capacitance of 99 Fg−1 at 2.5 Ag−1 current density. [Display omitted] •NRGO-Ta2O5 nanocomposite has been synthesized by simple hydrothermal method.•Characterization confirms the doping of N to RGO and formation of nanocomposite.•NRGO-Ta2O5 nanocomposite showed specific capacitance of 808 Fg-1.•Fabricated ASD attained specific capacitance of 99 Fg-1 at 2 Ag-1 current density.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.158572