Development of Nanocomposite Electrodes and Separators for Supercapacitors

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Alptekin AYDINLI-PhD Thesis.pdf

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2022-2-10

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Aydınlı, Alptekin

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Supercapacitors or electrochemical capacitors are known as one of the most promising energy storage systems for the 21st century. Having the potential to complement batteries, supercapacitors have received a lot of attention thanks to their high specific power and moderate energy densities. Supercapacitors have various application areas ranging from electric vehicles to portable systems and devices. In particular, their fast charge-discharge feature enables integration with consumer electronics, mobile devices and renewable energy systems. The widespread use of supercapacitors in many other electronic systems may also be possible if they gain new functions, such as flexibility, textile integration, environmentally friendly components and charge level indication. Supercapacitor electrodes with these multifunctional properties will be notable for both industrial and commercial applications. The use of nanocomposite electrode materials is very attractive for supercapacitors. Many studies have been carried out to improve the performance of supercapacitors using nanocomposites and a wide knowledge has been gained in this area. However, there are still many unknowns due to the variety of the combinations of the nanocomposite materials, and therefore further studies in this area ae required. In this thesis study, carbon nanotube-polyaniline, expanded graphite-polypyrrole, carbon nanoflake-manganese dioxide, reduced graphene oxide-molybdenum disulfide and hexagonal boron nitride-molybdenum disulfide nanocomposites are investigated as active materials for supercapacitor electrodes. In addition, hexagonal boron nitride-polyvinyl alcohol nanocomposites are investigated as separators for supercapacitors. The use of nanocomposite materials has improved many performance characteristics of supercapacitors compared to pure components. Therefore, it is concluded that the commercialization of nanocomposite-based supercapacitors will continue to become widespread in the coming years.

Subject Keywords

Supercapacitors, Nanocomposites, Energy storage, Electrodes, Separators

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https://hdl.handle.net/11511/96697

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Aydınlı, “Development of Nanocomposite Electrodes and Separators for Supercapacitors,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.