Document Details

Document Type : Thesis 
Document Title :
Optimizing Electrospinning Parameters of Nickel-based Nanofibers for Energy Storage Devices
تحسين الغزل الكهربائي لألياف أكسيد النيكل النانوية لأجهزة تخزين الطاقة
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : Supercapacitors have been considered as one of the main energy storage devices in the future due to their higher electric power density and longer cyclic performance than batteries. Recently, one-dimensional electrospun nanofibers serve as promising supercapacitor electrodes because of their high surface area, high porosity, lightweight, flexibility, and resistance to aggregation. In this study, we investigate the effects of optimizing electrospinning parameters and utilizing different nickel precursors on the formation of nanostructured nickel oxide, as well as on its electrochemical performance as supercapacitor electrodes. Smooth and uniform nanofibers without beads and accumulation are successfully synthesized using the required electrospinning voltage and the optimal concentration of the polyvinyl alcohol polymeric support within nickel precursors. In contrast to the case of using nickel nitrate, increasing the nickel acetate molar concentration maintains the flexible fibrous sheet morphology of the as-spun sample during the polycondensation and calcination processes. As a result, our flexible electrode of NiO nanofibers derived from nickel acetate exhibits a maximum areal capacitance of 56 mF/cm2 and a charge transfer resistance of 1 ohm which are considered as better electrochemical performance values than that of nickel nitrate-derived nickel oxide. Interestingly, such a systematic investigation of the correlation between material precursors and properties could support the electrodes development and hence promote the energy storage applications. To further improve the electrochemical storage performance, we combined nickel oxide nanofibers with carbon nanotubes as a hybrid electrode. We compared the performance of nickel oxide nanofibers as a pure electrode with the hybrid electrode in half-cell and full-cell testing systems. In both cases, the hybrid electrode displays a higher and more steady areal capacitance than that of the pure electrode, due to the synergetic effect between the nickel oxide nanofibers and carbon nanotubes. Altogether, this work demonstrates the effectiveness of the hybrid electrodes based on the electrospun nanofibers for the supercapacitor applications. 
Supervisor : Dr. Nuha Alawi alhebshi 
Thesis Type : Master Thesis 
Publishing Year : 1443 AH
2022 AD 
Added Date : Thursday, January 19, 2023 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ريزوان قولي أحمدي توحيديAihemaitituoheti, Reziwanguli ResearcherMaster 

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