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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
Author(s) -
Ates Murat,
Eren Nuri,
Osken Ipek,
Baslilar Suzan,
Ozturk Turan
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40061
Subject(s) - thiophene , capacitance , materials science , cyclic voltammetry , dielectric spectroscopy , carbon nanotube , electrochemistry , monomer , conductive polymer , analytical chemistry (journal) , supercapacitor , nyquist plot , electrode , polymer chemistry , polymer , chemistry , composite material , organic chemistry
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, Bode‐magnitude—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 −1 . 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 −2 ) has been found to be 25 times higher than P(Th 4 DTT) ( C dl = 0.18 mF cm −2 ). © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40061.