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Synthesis of MXene/Polyaniline Composite as an Electrode Material for Supercapacitors

Borzou, Mohadeseh | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56514 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Khachatourian, Adrineh Malek; Bagheri, Reza; Esfandiar, Ali
  7. Abstract:
  8. Titanium carbide MXene (Ti_3 C_2 T_x) has attracted significant research interest because of its extraordinary advantages as advanced electrode material for energy storage. In this study, 4-aminodiphenylamine functionalized Ti_3 C_2 T_x/polyaniline composite synthesized by in situ growth of PANI on 4-aminodiphenylamine functionalized Ti_3 C_2 T_x nanosheets. First, Ti_3 C_2 T_x MXene nanosheets was prepared according to the minimally intensive layer delamination (MILD) method followed by sonication. Ti_3 C_2 T_x nanosheets were modified with 4-aminodiphenylamine diazonium salt. The FTIR، FE-SEM and EDS analysis were used to characterize modified Ti_3 C_2 T_x. Finally, the Ti_3 C_2 T_x nanosheets were covalently modified with different mass ratio of Ti3C2Tx MXene and aniline (1:1 and 1:2) by in situ polymerization. The 4-aminodiphenylamine group as a linker makes PANI tightly and orderly anchor on Ti_3 C_2 T_x via Ti-O-C covalent bond. Ti3C2Tx/PANI composites were first characterized by XRD, FTIR, SEM, and TEM, and then their electrochemical performances were investigated by cyclic voltammetry (CV) galvanostatic charge–discharge (GCD) and electrochemical impedance (EIS) measurements. The three-electrode system demonstrated that the specific capacitance of the 4-aminodiphenylamine functionalized Ti_3 C_2 T_x/polyaniline (1:2) composite can be as high as 598.6 F g−1 at 0.1 A g−1. Impressively, the corresponding symmetric supercapacitor delivers an excellent electrochemical cycling stability with 95.5% retention after 5000 cycles
  9. Keywords:
  10. Titanium Carbide Mxene Composite ; Supercapacitor Electrode ; Polyaniline ; High Rate Capability ; Galvano Static

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