Development of Nanocomposite Electrodes and Separators for Supercapacitors

Download

Alptekin AYDINLI-PhD Thesis.pdf

Date

2022-2-10

Author

Aydınlı, Alptekin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

363
views

355
downloads

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

URI

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

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Development andcharacterization of activated carbon / transition metal phosphide composites for electrochemical capacitors Köse, Kadir Özgün; Aydınol, Mehmet Kadri (null; 2019-09-11) Electrochemical capacitors are the energy storage devices based mainly on electrical double layer formation. Their power densities are exceptionally high; however, their energy densities are characteristically low to compete various types of batteries in market. Therefore, there have been great amount of studies to enhance electrochemical capacitors’ energy density. Utilization of inorganic materials such as transition metal oxides and/or phosphides is one of the most common strategies to increase energy de...
Investigation of Self-Excited Ultrahigh Speed Induction Generators for Distributed Generation Systems Jardan, Rafael K.; Varga, Zoltan; Nagy, Istvan (2011-09-10) Application of ultra high speed induction generators (IG) in a system developed for utilization of renewable and waste energies that can be applied in Distributed Generation System is presented. The energy conversion is made by a turbine-generator set. For the electromechanical energy conversion application of special high speed induction generators has been studied and described in the paper. The design and analysis of the system are relied on computer simulation techniques verified by test results.
Enhanced supercapacitors from hierarchical carbon nanotube and nanohorn architectures Hiralal, Pritesh; Wang, Haolan; Ünalan, Hüsnü Emrah; Liu, Yinglin; Rouvala, Markku; Wei, Di; Andrew, Piers; Amaratunga, Gehan A. J. (2011-01-01) Supercapacitors fill the power and energy gap between electrolytic capacitors and batteries. The energy density for commercial supercapacitors is currently limited to similar to 5 Wh kg similar to 1. Enhancing the energy and power density of supercapacitors is of great interest as it would open up a much wider range of applications. In this work, thin film supercapacitors made of random networks of single-walled carbon nanotubes (SWNTs) were enhanced by the use of carbon nanoparticles of a size ideal to fil...
Electrochemical performance and modeling of lithium-sulfur batteries with varying carbon to sulfur ratios Michaelis, Charles; Erisen, Nisa; PALA, DAMLA EROĞLU; Koenig, Gary M. (Wiley, 2019-02-01) Lithium-sulfur batteries have attracted much research interest because of their high theoretical energy density and low-cost raw materials. While the electrodes are composed of readily available materials, the processes that occur within the cell are complex, and the electrochemical performance of these batteries is very sensitive to a number of cell processing parameters. Herein, a simple electrochemical model will be used to predict, with quantitative agreement, the electrochemical properties of lithium-s...
Modification of single walled carbon nanotube thin films for supercapacitor electrodes Durukan, Mete Batuhan; Ünalan, Hüsnü Emrah; Department of Metallurgical and Materials Engineering (2017) Electrochemical capacitors, or supercapacitors, attracted a lot of attention in recent years due to their stability under numerous charge-discharge cycles, high charge discharge rates, and high power density when compared to batteries and conventional capacitors. Since their energy density is much lower than batteries, current research on supercapacitors is focused on improving the energy density through the development of novel active materials and innovative design of the electrodes. Carbon nanotubes are ...

Citation Formats

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