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http://hdl.handle.net/11375/30174
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DC Field | Value | Language |
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dc.contributor.advisor | Zhitomirsky, Igor | - |
dc.contributor.author | Chen, Silin | - |
dc.date.accessioned | 2024-09-09T14:25:03Z | - |
dc.date.available | 2024-09-09T14:25:03Z | - |
dc.date.issued | 2024-11 | - |
dc.identifier.uri | http://hdl.handle.net/11375/30174 | - |
dc.description.abstract | In this study, PPy prepared by chemical polymerization was investigated as the active material for the electrode of supercapacitors. New anionic dopants and advanced dispersants were developed for PPy and PPy-based composites. These methods improved the overall electrochemical performance and cyclic stability of PPy electrodes. The pseudocapacitive properties of ferrimagnetic and ferromagnetic materials were explored and combined with PPy to fabricate composites with enhanced charge storage properties and magnetic properties. The results indicated that high active mass loading and good electrochemical performance of PPy-based composite electrodes were achieved by optimizing content and improving dispersion of conducting additives multiwalled carbon nanotubes (MWCNT) with advanced dopant-dispersants including 1,3,(6,7)-naphthalenetrisulfonic acid trisodium salt hydrate, 1,3,6,8-pyrenetetrasulfonic acid tetrasodium salt hydrate, 1-Diazo-2-naphthol-4-sulfonic acid, sodium taurocholate, redox-active dopant methyl orange, as well as advanced dispersant and charge-transfer mediator gallocyanine. Surface modification of magnetic materials by high-energy ball milling is also beneficial for good performance. The electrochemical testing results demonstrated that the fabrication of PPy and magnetic composite materials is promising for supercapacitors applications. | en_US |
dc.language.iso | en_US | en_US |
dc.title | ADVANCED DOPANTS FOR POLYPYRROLE SYNTHESIS AND MAGNETIC POLYPYRROLE COMPOSITE ELECTRODES FOR SUPERCAPACITORS | en_US |
dc.type | Thesis | en_US |
dc.contributor.department | Materials Science and Engineering | en_US |
dc.description.degreetype | Thesis | en_US |
dc.description.degree | Master of Applied Science (MASc) | en_US |
dc.description.layabstract | New challenges have emerged due to the extensive consumption of fossil fuel and environmental pollution. Supercapacitors have attracted extensive attention as energy storage devices because of their high power density, fast charge-discharge rate and excellent cyclic stability. Polypyrrole (PPy) is a promising material for the fabrication of electrodes for supercapacitors, however, the poor capacitance retention limits its large-scale application. The important task is the development of advanced dopants for PPy synthesis and fabrication of novel composites, which exhibit enhanced capacitive and magnetic properties. The objective of this work was to fabricate high-performance PPy-based electrodes for supercapacitors based on the development of advanced dopants and composites materials. Novel advanced anionic dopants were discovered and incorporated into PPy and PPy-based materials, which laid the foundation of efficient synthesis of high performance PPy. The composites containing PPy and magnetic materials were developed and the fundamental charging mechanisms were investigated. The results presented in this work showed promising performance and paved the way for the development of advanced multifunctional materials and devices for energy storage. | en_US |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Chen_Silin_202408_MASc.pdf | 8.87 MB | Adobe PDF | View/Open |
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