Poly(2,6‐di(thiophene‐2‐yl)‐3,5bis(4‐(thiophene‐2‐yl)phenyl)dithieno [3,2‐b;2',3'‐d]thiophene)/carbon nanotube composite for capacitor applications

Abstract

A novel monomer, 2,6-di(thiophene-2-yl)-3,5bis(4-(thiophene-2-yl)phenyl)dithieno [3,2-b;2',3'-d]thiophene (Th 4 DTT) has been synthesized and used as an electro-active material. It has been electropolymerized onto glassy carbon (GC) electrode in sodium dodecyl sulfate (SDS) solution (0.1 M) together with multi-walled carbon nanotubes (MWCNT). A good capacitive characteristics for P(Th 4 DTT)/MWCNT composite has been obtained by electrochemical impedance spectroscopy (EIS), which is, to our best knowledge, the first report on capacitor behavior of a dithienothiophene. A synergistic effect has been resolved by Nyquist, Bodemagnitude-phase and admittance plots. Specific capacitance of the conducting polymer/MWCNT, calculated from cyclic voltammogram (CV) together with area and charge formulas, has been found to be 20.17 F g 21 . Long-term stability of the capacitor has also been tested by CV, and the results indicated that, after 500 cycles, the specific capacitance is 87.37% of the initial capacitance. An equivalent circuit model of R s (C 1 (R 1 (Q(R 2 W))))(C 2 R 3 ) has been obtained to fit the experimental and theoretical data. The double layer capacitance (C dl ) value of P(Th 4 DTT)/MWCNT (4.43 mF cm 22 ) has been found to be 25 times higher than P(Th 4 DTT) (C dl 5 0.18 mF cm 22 ).

Thienothiophenes, Dithienothiophenes, and Thienoacenes: Syntheses, Oligomers, Polymers, and Properties

“…A device constructed from this polymer and PEDOT was operated in a potential range of 0.0−2.0 V, providing red and blue colors. 548c with four 2-thienyl groups located at α-positions and para positions of phenyl units of 514a was synthesized 310 and electropolymerized onto a glassy carbon electrode in sodium dodecyl sulfate solution together with multiwalled carbon nanotubes. Electrochemical impedance spectroscopy demonstrated a good capacitive property for 548c composite.…”

Reversible Doping of a Dithienothiophene‐Based Conjugated Microporous Polymer

“…28–40 Recently, the incorporation of thiophene or two fused thiophene rings (thienothiophenes, TTs) into microporous covalent organic frameworks (COFs) and the first tests to apply such structures for photovoltaic devices have been reported 12. 41 Here, we report a CMP based on a dithienothiophene derivative (DTTPh 2 ‐Th 4 ),42 possessing four thiophene units at the peripherals (see Scheme ), and its (electro)chemical redox properties.…”

Humidity-Controlled Preparation of Flexible Porous Carbon Fibers from Block Copolymers

“…); however, their architectures are susceptible to tears and cracks. , Conductive polymer fibers ( e.g ., polyaniline (PANI), poly­(3,4-ethylenedioxythiophene) (PEDOT), and polypyrrole (PPy)) possess good processability and can be easily integrated with other materials such as cobalt oxide wires, graphene oxides, and polymer binders . However, swelling and shrinking of the conductive polymer fibers cause short electrode life. , Carbon fibers are known for their superior mechanical strength and have high conductivity similar to metal wires and high redox stability . Therefore, the development of carbon fiber electrodes is desirable for high-performance flexible electrodes.…”

“…18 However, swelling and shrinking of the conductive polymer fibers cause short electrode life. 19,20 Carbon fibers are known for their superior mechanical strength and have high conductivity similar to metal wires and high redox stability. 21 Therefore, the development of carbon fiber electrodes is desirable for highperformance flexible electrodes.…”