Speaker
Description
Portable electronics, electric cars, and large-scale energy systems are becoming increasingly popular, creating a need to move towards energy storage technologies that can deliver both high energy and power densities quickly and reliably. Supercapacitors (SCs) have emerged as promising energy storage devices due to their fast charge/discharge capabilities, long cycling life, and environmental benefits. The efficiency of SCs mainly depends on the active materials incorporated into their electrodes. Among these, MXene-based materials, particularly Ti3C2Tx, have attracted much interest due to their high electrical conductivity, large surface area, and longevity. In this study, we investigate the electrochemical performance of Ti3C2Tx doped with varying amounts of nickel-doped bismuth oxychlorides (Ni-BiOCl) as supercapacitor electrodes. Structural characterization using scanning electron microscopy with dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) confirmed successful doping of Ni-BiOCl and revealed increased interlayer spacing, improved morphology, and uniform elemental distribution. The electrochemical analysis of the Ni-BiOCl@Ti3C2Tx composites confirmed Faradic charge-storage contributions from reversible Bi3+/Bi5+ and Ni2+/Ni3+ redox couples, with the optimal concentration of 10% Ni-BiOCl achieving a discharge time of 485 seconds at 0.5 A/g, representing a 213% enhancement over pristine MXene (155 seconds). Overall, the 10Ni-Bi@Ti3C2Tx composite showed a specific capacity (Qsp) of 242.5 C/g (areal capacitance of 2686.15 mF/cm2), representing a significant improvement over MXene-based electrodes reported in the literature.
| Apply for student award at which level: | PhD |
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| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |