Abstract
Energy storage is one of the critical challenges and researchers are finding sophisticated ways to meet this challenge. To cope with this major need, the pure and W-doped NiO nano-sheets with different doping ratios (0–6%) were synthesized by facile hydrothermal route. Influence of W content on structural and capacitive properties was studied by employing XRD, SEM, TEM, EDS, BET, CV, GCD and EIS techniques. The tuning of morphology from micro-structures to nano-sheets is achieved by doping various contents ratio of tungsten in NiO. The pseudocapacitive behavior has been shown by nano-sheets and the 4 at. % W-doped NiO has shown maximum specific capacitance equal to 872.32 F/g which is suggestively greater in comparison to several reported NiO based materials. These nanosheets exhibited excellent charging-discharging retention (84.38%) and reasonable cyclic stability (87.5%) after 3000 CV cycles at 5 mV/s scan rate. High capacitance and stability of these nano-sheets have shown their promising application in supercapacitors.
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The authors acknowledge the Higher Education Commission (HEC) of Pakistan, for providing funding under NRPU Research Project Nos. 6502 and 6510.
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Ahmed, R., Nabi, G., Khalid, N.R. et al. Controlled synthesis and enhanced electrochemical performance of tungsten doped NiO nano-sheets for supercapacitors. Appl Nanosci 11, 1279–1289 (2021). https://doi.org/10.1007/s13204-021-01729-3
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DOI: https://doi.org/10.1007/s13204-021-01729-3