1. Unlocking enhanced electrochemical performance of SnO2-Bi2WO6 nanoflowers for advanced supercapacitor device.
- Author
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Akkinepally, Bhargav, Nadar, Nandini Robin, Neelakanta Reddy, I., Jeevan Rao, H., Nisar, Kottakkaran Sooppy, and Shim, Jaesool
- Subjects
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SUPERCAPACITORS , *STANNIC oxide , *ELECTRODE performance , *ENERGY storage , *POTENTIAL energy , *ENERGY density - Abstract
SnO 2 quantum dots interspersed Bi 2 WO 6 nanoflowers were successfully synthesized to create a cost-efficient electrode material specifically designed for energy storage devices. The performance of the electrodes was evaluated by studying their structural and functional properties. The SnO 2 quantum dots coupled with Bi 2 WO 6 nanoflowers-based electrodes exhibited an enhanced electrochemical behavior compared to those without the SnO 2. A functional investigation of the developed electrodes in a 3 M KOH electrolyte demonstrated specific capacitance values of 812 and 741 F.g−1 (225.5 and 206 mAh.g−1) for SnO 2 -Bi 2 WO 6 (BWSq) and Bi 2 WO 6 (BW) nanoflowers, respectively, at a current density of 7 A.g−1. Excellent cycling stability was observed for both BWSq and BW electrodes, with specific capacity values of 226 and 159 mAh.g−1 (814 and 572 F.g−1), respectively, after 3000 cycles at a current density of 22 A.g−1. The fabricated BWSq symmetric super-capacitor (SSC) device demonstrated a superior performance with an exceptional specific capacitance of 75.6 F.g−1 when subjected to a current density of 0.5 A.g−1. Additionally, the device displayed impressive energy and power densities, reaching 31.1 Wh.kg−1 and 14040 W.kg−1, respectively. Moreover, the BWSq SSC device demonstrated notable cyclic stability, manifesting a capacity retention of 62% over 5000 galvanostatic charge-discharge cycles. The outcomes of this study suggest that the BWSq nanostructure holds immense promise as a prospective contender for energy storage applications, offering great potential for practical implementation. • A novel SnO 2 quantum dots interspersed Bi 2 WO 6 nanoflowers (BWSq) electrode material prepared for supercapacitor. • BWSq demonstrates superior specific capacitance, rate capability, and cycling stability compared to Bi 2 WO 6 nanoflowers (BW). • Fabrication and evaluation of a high-performance symmetric supercapacitor (SSC) using BWSq electrodes. • Enhanced charge transfer behavior in BWSq electrodes, highlighting their potential for advanced energy storage applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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