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Synthesis and Characterization of Flexible Supercapacitors Based on Polymeric Hydrogel

Fazeli, Shabnam | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56892 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shojae, Akbar
  7. Abstract:
  8. Today, supercapacitors are an inseparable component of electronic devices such as hybrid cars, telecommunication equipment, and personal electronic devices, and this device is also used to store clean energy. In this research, polyacrylic acid hydrogel was first synthesized to be used as a supercapacitor electrode and polyaniline was used as an electrically conductive polymer in its structure to improve the electrical properties of this hydrogel. To achieve this structure, the previously synthesized polyacrylic acid hydrogel was immersed in a solution of aniline monomer and other components necessary for the aniline polymerization reaction, and after the soaking process was completed, the in situ polymerization of aniline in the polyacrylic acid hydrogel was performed. The hydrogel made in this way has a specific capacity equal to 322 mF.cm-2 and a strain equal to 900%. Next, due to the high specific surface area of organic-metallic frameworks, UiO-66 was used as nanoparticles. The results showed that this nanoparticle had a significant effect on the results of electrochemical tests, but due to improper dispersion in mechanical tests, less improvement was achieved, therefore, graphene oxide was used as the second nanoparticle to help improve mechanical properties while improving the dispersion of UiO-66. The results obtained from the hydrogel containing hybrid nanoparticles showed that the specific capacity value increased to 730 mF.cm-2 and the strain value increased to 2500%. Therefore, it can be said that the presence of graphene oxide does not have a great effect on improving the specific capacity of the hydrogel containing UiO-66, but by providing the necessary interactions between UiO-66 and the hydrogel matrix, it improves its nanoparticle dispersion and ultimately the mechanical properties
  9. Keywords:
  10. Hydrogel ; Supercapacitor ; UiO-66 Hybrid Nanoparticles ; Polyaniline ; Polyacrylic Acid

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