Electrochemical polymer synthesis using thiophene and pyrrole/carbazole: Their electrochemical behaviours and capacitor performance

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Aydın Kocaeren A., Şenol Bahçeci D., Kızılkaya B., Doğan F.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, cilt.967, sa.118486, ss.1-13, 2024 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 967 Sayı: 118486
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.jelechem.2024.11848
  • Dergi Adı: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Sayfa Sayıları: ss.1-13
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

In this study, carbazole-derived monomers were synthesized on ITO-coated PET via electrochemical reactions

and conductivity measurements of the resulting polymeric films were performed by UV, FT-IR, NMR, TG-DTG,

SEM and AFM analyses. Their spectroelectrochemical properties were investigated. The carbazole (C) based

thiophene (Th) polymer abbreviated as pThC and its copolymer with pyrrole (Py), named as pThC-Py were

obtained by electrochemical polymerization method. The surface stability of the resulting polymer films was

good depending on time. The contact angle (CA) between the water and theco- polymer surface was determined

by dropping 6.09 μL of pure water and CA average was calculated as 68.19◦ < 90◦. According to the thermal

analysis data of the polymers, the thermal stability of the pThC-Py was better than pThC as it had higher thermal

decomposition temperature. Comparisons of electrical conductivity measurements of the polymer films were

made depending on the temperature (25, 50 and 90 ◦C). Due to increasing temperature, the electrical conductivity

of pThC-Py film was read as 29.3 S/cm at 90 ◦C, and also the electrical conductivity values of the pThC-Py

were determined as 1.92 × 10􀀀 2 S/cm at 25 ◦C and 14.2 S/cm at 50 ◦C. Because of the high electrical conductivity

of the pThC-Py, its capacitor performance was tried to be determined from cyclic voltammetric measurements.

According to the voltammetric results, the power density (P) and the energy density (E) values of the

synthesized substance were calculated as 290.532 W/g and 9.684 Wh/g, respectively. This indicates that the

amount of energy the material storable is relatively high. Moreover, it is possible to say that it can be included in

the classical capacitor class and in the supercapacitor category by improving its features. Moreover, since the

electrical conductivity of pThC-Py is quite good, it is thought that it may be suitable for use in electronic devices.