| Autor: |
Patil, Sharadchandra S., Nikam, Prashant N., Shinde, Surendra K., Fulari, Akash V., Alshehri, Sultan, Tamboli, Mohaseen S., Truong, Nguyen Tam Nguyen, Fulari, Vijay J. |
| Zdroj: |
Jouranl of Energy Storage; October 2024, Vol. 100 Issue: 1 |
| Abstrakt: |
In this study, nickel tungstate (NiW) nanospheres were synthesized using a facile hydrothermal method. The morphology of the NiW nanospheres was found to vary with hydrothermal reaction time (4, 6, 8, and 10 h) at a constant reaction temperature. Different physico-chemical tools such as XRD, FESEM, EDAX and Elemental Mapping are used for the characterization of NiW sample. X-ray diffraction (XRD) analysis revealed that the NiW material exhibited a monoclinic crystal system with a P2/c space group. The Field Emission scanning electron microscopy (FE-SEM) analysis reveals a spherical morphology. Electrochemical measurements of NiW electrodes were conducted in a 1 M KOH electrolyte within a potential window of 0 to 0.5 V vs SCE. The NiW electrode synthesized after a 4 h reaction time exhibited a specific capacitance of 857 F/g at a scan rate of 5 mV/s. The specific capacitance determined from the GCD curve was 783 F/g at a current density of 5 mA/cm2. Additionally, the NiW-4 electrode exhibits an excellent energy density of 27.4 Wh/kg at a power density of 1645 W/kg and outstanding cyclic stability with 86.24 % retention after 5000 charge/discharge cycles. These findings suggest that the synthesized NiW could serve as a highly efficient electrode material for energy storage applications. |
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