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Development of Multicomponent Polyimide - Carbon Nanotube/polypyrrole Composites for Enhanced Energy Storage in Supercapacitor Electrodes

Gooneratne, Ruchinda
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1668636386395851

Abstract Details

2022, PhD, University of Cincinnati, Engineering and Applied Science: Materials Science.
The demand for newer, more efficient, and greener sources of energy storage materials has been a major focus of research today. With the rise in everyday gas prices and the imposition of stricter regulations on the use and eventual phasing out of fossil fuels, the electric age is brighter than ever. The challenges in technology faced in this transition have been the material limitations of storing large quantities of electrical charge and being able to dissipate it over a longer duration of time. Having an energy storage device with simultaneously high energy and power densities can make a positive global impact on the environment, and renewable energy systems. Lithium-ion batteries have evolved and transcended in the recent past to power almost every device across the spectrum, from watches to electrical vehicles and beyond. However, these batteries require expensive metal oxides that are rather heavy and have limited life cycles. This research looks at organic polymeric supercapacitors as an alternative form of energy storage material to address these limitations. The inherent advantages of supercapacitors include high power and energy densities, greater charge cyclability, longer service lifespans, and overall ease as well as the speed at which they can be charged over a wide range of temperatures. The high electrical conductivity and porosity of the electrodes contribute to the improved electrochemical performance of the supercapacitor. A multifunctional polyimide-based single-walled carbon nanotube (SWCNT/PI) nanocomposite is the focus of this research. This study investigates the effect of surface morphology on the electrochemical properties of the polymer nanocomposite prepared by the electrodeposition of doped polypyrrole (PPy) which is an inherently conducting polymer. The dopants used to enhance PPy are analyzed in this research and include p-Toluene sulfonic acid (TSA), Naphthalene disulfonic acid (NDSA), Naphthalene trisulfonic acid (NTSA), Dodecylbenzene sulfonic acid (DBSA), and Styrene sulfonic acid (SSA). The effect of surface modification of the SWCNT/PI electrode and the consequent energy storage properties are assessed and characterized using electrochemical techniques and microscopy. This study observed a maximum specific capacitance of 158 F/g for 0.5Py/ 0.1NTSA followed by 127 F/g for 0.5Py/ 0.1TSA, using charge/discharge at 0.5A/g. Capacitance retentions were observed to have increased in some materials as their charge cycling increased. The use of a high-performance PI matrix polymer also contributes to the composite’s high-temperature stability.
Jude Iroh, Ph.D. (Committee Member)
Randall Allemang, Ph.D. (Committee Member)
Mark Schulz, Ph.D. (Committee Member)
Yoonjee Park, Ph.D. (Committee Member)
Michael Mains, M.S. (Committee Member)
162 p.
Materials Science
Energy Storage; Electrochemical; Polyimide; Polypyrrole; Single walled carbon nanotubes

Recommended Citations

Citations

  • Gooneratne, R. (2022). Development of Multicomponent Polyimide - Carbon Nanotube/polypyrrole Composites for Enhanced Energy Storage in Supercapacitor Electrodes [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1668636386395851

    APA Style (7th edition)

  • Gooneratne, Ruchinda. Development of Multicomponent Polyimide - Carbon Nanotube/polypyrrole Composites for Enhanced Energy Storage in Supercapacitor Electrodes. 2022. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1668636386395851.

    MLA Style (8th edition)

  • Gooneratne, Ruchinda. "Development of Multicomponent Polyimide - Carbon Nanotube/polypyrrole Composites for Enhanced Energy Storage in Supercapacitor Electrodes." Doctoral dissertation, University of Cincinnati, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1668636386395851

    Chicago Manual of Style (17th edition)

ucin1668636386395851
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This open access ETD is published by University of Cincinnati and OhioLINK.
Release 3.2.12