SYNTHESIS, CHARACTERIZATION, AND APPLICATION OF MANGANESE-DOPED IRON SULFIDE NANOPLATELETS ON CARBON CLOTH: A NEGATIVE FLEXIBLE AND WEARABLE ELECTRODE MATERIAL FOR FUTURE ELECTRONICS AND ENERGY STORAGE

Date

2023-9-6

Author

Gözütok, Almila Nur

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Addressing the urgent need for eco-friendly solutions in capturing and storing clean energy has prompted a search for efficient alternatives. As society becomes more mobile and demands flexible, compact, and highly efficient future electronics, exploring new materials that meet these criteria is crucial. This thesis is motivated by the idea of harnessing the potential of manganese-iron-sulfur-based electrodes, an intriguing yet underused material, by directly growing them on carbon cloths to create flexible electrode materials for energy storage applications. The hydrothermal method was strategically selected for manufacturing these electrodes, as it enhances the interaction between the active material and the entire 3D network of the textile while overcoming challenges associated with synthetic methods and insulating binders. Through thorough evaluations of electrochemical performance, this study aims to determine the viability of fabricated electrodes as promising candidates for future electronics, and the results have been highly encouraging. The thesis includes various studies, such as the successful direct growth of nanoparticles on carbon cloth, morphological and structural characterizations of as-synthesized material using multiple analytical methods, preparation of negative and positive electrodes to construct a flexible device, and detailed electrochemical characterization and investigation of the application potential of the as-prepared electrodes for real-world scenarios. The prepared electrodes demonstrated remarkable performance, exhibiting a high specific capacitance of 206 F g-1 and exceptional cyclic stability up to 11000 cycles. Moreover, by employing a specialized encapsulation technique, the as-fabricated electrodes exhibited efficient operation over an extended period of three months. These electrodes were then integrated to create a self-powered flexible supercapacitor, successfully illuminating embedded green LED arrays within a hoodie.

Subject Keywords

Negative Electrodes, Supercapacitors, Transition-metal-sulfides, Energy Storage, Flexible Supercapacitors

URI

https://hdl.handle.net/11511/105564

Collections

Graduate School of Natural and Applied Sciences, Thesis