V2O5 nanowires-graphene composite as an outstanding electrode material for high electrochemical performance and long-cycle-life supercapacitor

Journal Article · Sat Dec 15 00:00:00 EST 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.08.028· OSTI ID:22805336

Ahirrao, Dinesh J.; Mohanapriya, K.; Jha, Neetu ^[1]

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1. Department of Physics, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga (E), Mumbai- 400019 (India)

Highlights: • V{sub 2}O{sub 5} nanowires anchored on the surface of rGO sheets using facile hydrothermal method for energy storage application. • High gravimetric capacitance of 1002 F g{sup −1} has been achieved at the current density of 1 A g{sup −1} in an aqueous electrolyte. • Exceptionally high energy density of 116 Wh kg{sup −1} has been obtained using supercapacitor coin cell. • Composite (V{sub 2}O{sub 5}-NW-G) exhibits excellent cyclic stability with 83.94 % capacitance retention after 5000 GCD cycles. - Abstract: A composite of V{sub 2}O{sub 5} nanowires with reduced graphene oxide (V{sub 2}O{sub 5}-NW-G) has been prepared using facile hydrothermal method and tested for charge storage supercapacitor application. Morphological and structural aspects of as prepared materials has been studied using material characterization techniques like transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The nanosized wires like structure of V{sub 2}O{sub 5} anchored on the graphene (rGO) sheets possesses improved electrical conductivity and high surface area. Electrochemical properties of the synthesized materials have been studied using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). Composite (V{sub 2}O{sub 5}-NW-G) exhibits exceptional properties like high gravimetric capacitance of 1002 F g{sup −1} along with good cyclic stability of 83.94% capacitance retention after 5000 repetitive GCD cycles. Excellent energy density of 116 Wh kg{sup −1} has been obtained at the power density of 1520 W kg{sup −1}.

• OSTI ID: 22805336
• Journal Information: Materials Research Bulletin, Vol. 108; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAPACITANCE
CAPACITIVE ENERGY STORAGE EQUIPMENT
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ENERGY STORAGE
FOURIER TRANSFORM SPECTROMETERS
GRAPHENE
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
NANOWIRES
POWER DENSITY
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
VANADIUM OXIDES
VOLTAMETRY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY