Issue 14, 2022

A study on the effect of phase conversion of tungsten nanostructures on their electrochemical energy storage performance

Abstract

Herein, we report the synthesis of tungsten based nanostructures such as WO3, WO3−x (W02.72:WS2), and WS2 through a facile single step hydrothermal technique. The optical, structural, and morphological studies are conducted, and the electrochemical performance of each electrode material is evaluated in a symmetric two electrode configuration. An enhancement in the electrochemical energy storage performance has been observed on changing the phase from WO3 to WS2, which may be due to the accompanying changes in morphology and surface area. At 1 A g−1, the symmetric supercapacitors with WO3, WO3−x, and WS2 electrodes exhibit specific capacitance values of 62, 86, and 215 F g−1, respectively. At a power density of 0.76 kW kg−1, the WO3, WO3−x and WS2 based devices offer energy density values of 5.5, 7.6, and 19.1 W h kg−1, respectively. The WS2 electrode based supercapacitor retains an excellent cycling stability rate of 97% over 10 000 continuous charge discharge cycles.

Graphical abstract: A study on the effect of phase conversion of tungsten nanostructures on their electrochemical energy storage performance

Supplementary files

Article information

Article type
Paper
Submitted
28 Apr 2022
Accepted
02 Jun 2022
First published
06 Jun 2022
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 5900-5910

A study on the effect of phase conversion of tungsten nanostructures on their electrochemical energy storage performance

V. V. Mohan, P. M. Anjana and R. B. Rakhi, Mater. Adv., 2022, 3, 5900 DOI: 10.1039/D2MA00475E

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