期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 861, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.158572
关键词
Ta2O5; NRGO; NRGO-Ta2O5 nanocomposite; Characterization; Asymmetric supercapacitor device
资金
- King Saud University, Riyadh, Saudi Arabia [RSP-2020/160]
A simplistic hydrothermal method was established to fabricate Nitrogen-doped reduced graphene oxide with tantalum pentoxide to form a nanocomposite; NRGO-Ta2O5. The nanocomposite exhibited enhanced specific capacitance in supercapacitor applications compared to individual Ta2O5 and NRGO.
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-Ta(2)O(5 )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 Ta(2)O(5 )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. (C) 2020 Elsevier B.V. All rights reserved.
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