Electrochemical Characteristics of Polythiophene Film Electrodes in Acetonitrile Solution

Komura, Teruhisa; Kitani, Naoki; Takahashi, Kazuya

doi:10.1246/bcsj.67.2669

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…There have been various equivalent circuits proposed for behavior of conducting polymers in contact with electrolytes. The ones proposed by Ferloni et al 33 and by Komura et al 34 contained double-layer capacitance, charge-transfer resistance, solution resistance, and Warburg impedance, etc. Fletcher 35 employed a complex transmission-line-type equivalent circuit to take into consideration the impedance in the electrolyte solution, the impedance due to the polarization inside the polymer, and the impedance of charge transfer at the solution-polymer interface.…”

Section: Resultsmentioning

confidence: 99%

Conducting Polymer with Metal Oxide for Electrochemical Capacitor: Poly(3,4-ethylenedioxythiophene) RuO[sub x] Electrode

Hong

Yeo

Paik

2001

J. Electrochem. Soc.

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Electrodes made by depositing ruthenium oxide on conducting poly͑3,4-ethylenedioxythiophene͒ ͑PEDT͒ were studied for their electrochemical and impedance properties. In acidic electrolytes the PEDT-RuO x composite electrodes exhibited large capacitance due to contributions from the double-layer capacitance and the faradaic capacitance. Optimization of the thickness of the conducting polymer film and the amount of ruthenium deposition was found necessary to realize large specific capacitance. The specific capacitance based on the combined mass of PEDT-RuO x was 420 F/g, and the specific capacitance based on the mass of RuO 2 was 930 F/g. The energy storage density of a capacitance cell constructed with a pair of PEDT-RuO x electrodes reached 27.5 Wh/kg when the cell was charged to 1.0 V. The impedance analysis of the composite electrode revealed that both the double-layer capacitance and the pseudocapacitance originating from both PEDT and RuO x contribute to large specific capacitance.

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Section: Resultsmentioning

confidence: 99%

Conducting Polymer with Metal Oxide for Electrochemical Capacitor: Poly(3,4-ethylenedioxythiophene) RuO[sub x] Electrode

Hong

Yeo

Paik

2001

J. Electrochem. Soc.

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“…Thus these parameters behaved as redox capacities22 in the manner of conducting polymer film electrodes. [24][25][26] Further evidence that these "double-layer capacities" are redox capacities associated, at least in part, with faradaic processes comes from the previous observation that distinct spectral changes were seen in the potential regions outside the peak potential regions." The spectroelectrochemical Nernst plots exhibited two linear segments, one with a slope corresponding to the narrow voltammetric peak widths and a second with a slope indicating a much broader redox process.…”

Section: Resultsmentioning

confidence: 99%

Cyclic Voltammetry of a TCNQ(0/−1) Solid‐State Redox Couple: Role of Nucleation and Nonideality for a Square Scheme Surface Redox Reaction

Chambers

Scaboo

Evans

1996

J. Electrochem. Soc.

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The cyclic voltammetry of a persistent TCNQ(O/-1) couple generated from thin polycrystalline films of 9-aminoacridinium(TCNQ), in contact with 1.0 M potassium acetate does not correspond to simple electron-transfer reactions of surface-confined species. The voltammograms are characterized by narrow peak widths much less than 3.52 RTIF for a oneelectron process, wide hysteresis (>200 mV) between the anodic and cathodic peaks, and significant apparent double-layer capacities. This voltammetric response has been modeled in the context of a square scheme on the basis of two different assumptions: (i) nonideality in terms of interaction parameters and (ii) nucleation phenomena. While calculated voltammograms based on either assumption predict the experimental hysteresis, the assumption of activation-controlled nucleation gave better agreement with the wave shapes. Chronoamperometric experiments gave further support for the role of a three-dimensional nucleation phenomenon.Electrically conducting organic salts in the TTF-TCNQ family are fascinating solid-state materials that have attracted much attention since their discovery more than 20 years ago.'z2 These materials feature segregated stacks of donor and/or acceptor species that produce low-dimensional solid-state structures, often with anisotropic properties. Much interest in these materials has been focused on their solid-state conductivities and related properties. Much less attention has been paid to their performance as working electrodes in electrochemical applications since the seminal work of Jaeger and Bard.3 Others have reported on the voltammetric behavior of conducting salt electrodes,4z5 and Ward has provided a comprehensive re vie^.^ Cyclic voltammograms (CVs) of these materials under conditions where the oxidation states of the conducting organic salt are insoluble (usually aqueous solution with high concentration of supporting electrolyte) are characterized by several distinctive features. These include ( 2 ) narrow peak widths that are often much less than the theoretical value of 3.52 RTInF for an n-electron surface wave, (ii) wide separation of oxidation and reduction peaks, and (iii) significant apparent double-layer capacities that are oxidation-state dependent. Conducting salt voltammograms with these features have been reported for working electrodes fabricated from single crystal^,^,^ polycrystalline pellet^,^.^-'^ polycrystalline films pressed on graphite sub~trates,'~-l~ vapor deposited films,13 silicone oil paste^,^ solidified polyvinylchloride s l ~r r i e s , ~~~, ~ and crystallites entrapped in Nafion films.14J5An example of this behavior is the voltammetry of polycrystalline films of 9-aminoacridinium(TCNQ), in contact with potassium electrolyte solutions. Oxidation of these films at 0.6 V us. saturated calomel electrode (SCE) in aqueous electrolyte solution involves expulsion of hydronium ions which activates a surface redox process involv-* Electrochemical Society Active Member. ** Electrochemical Society Student Member.

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“…C2 represent the double layer capacitance and R3 is the charge transfer resistance. Constant phase element (CPE) accounts for the diffusion response on the charge transfer process, which is highly sensitive to the roughness and inhomogeneity of the electrode surface [27][28][29][30][31][32]. Figure 6 shows the X-ray diffraction patterns of (a) bulk PProDOT-Hx 2 powder and (b) PProDOT-Hx 2 films on ITO coated glass substrate.…”

Section: Ac Impedance Spectroscopymentioning

confidence: 99%

Optical, Electrochemical, and Structural Properties of Spray Coated Dihexyl Substituted Poly (3,4 Propylene Dioxythiophene) Film for Optoelectronics Devices

Siju

Saravanan

Rao

et al. 2014

International Journal of Polymeric Materials and Polymeric Biom

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Electrochemical Characteristics of Polythiophene Film Electrodes in Acetonitrile Solution

Cited by 5 publications

References 14 publications

Conducting Polymer with Metal Oxide for Electrochemical Capacitor: Poly(3,4-ethylenedioxythiophene) RuO[sub x] Electrode

Conducting Polymer with Metal Oxide for Electrochemical Capacitor: Poly(3,4-ethylenedioxythiophene) RuO[sub x] Electrode

Cyclic Voltammetry of a TCNQ(0/−1) Solid‐State Redox Couple: Role of Nucleation and Nonideality for a Square Scheme Surface Redox Reaction

Optical, Electrochemical, and Structural Properties of Spray Coated Dihexyl Substituted Poly (3,4 Propylene Dioxythiophene) Film for Optoelectronics Devices

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