Electrochemical impedance characterization and potential dependence of poly[3,4-(2,2-dibutylpropylenedioxy)thiophene] nanostructures on single carbon fiber microelectrode

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• 作者：Metehan C. Turhan^a ; ^b ; A. Sezai Sarac^a ; ^{sarac@itu.edu.tr} ; Asli Gencturk^a ; Hans-Detlev Gilsing^d ; Heike Faltz^d ; Burkhard Schulz^c ; ^d
• 关键词：Nanostructure ; Electrochemical impedance spectroscopy ; Conjugated polymeric thin film ; Carbon fiber
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：April, 2012
• 卷：162
• 期：5-6
• 页码：511-515
• 文件大小：858 K

摘要

The electropolymerization of 3,4-(2,2-dibutylpropylenedioxy)thiophene (ProDOT-Bu₂) onto single carbon fiber microelectrode (SCFME) was conducted in acetonitrile (ACN) containing sodium perchlorate (NaClO₄) as electrolyte and investigated by cyclic voltammetry (CV). The nanostructured films of poly[3,4-(2,2-dibutyl-propylenedioxy)thiophene] (PProDOT-Bu₂) which were depositing showed complete reversible redox behavior in monomer-free electrolyte solution.

The capacitive behavior of the films was investigated by electrochemical impedance spectroscopy (EIS) at applied potentials from 0.1 V to 1.3 V. The analysis by equivalent circuit modeling revealed an applied potential around 0.4 V to be most suitable for the system PProDOT-Bu₂/SCFME as a double layer supercapacitor component inducing a double layer capacitance C_dl value of 62 mF cm^鈭?.