On the p-doping of PEDOT layers in various ionic liquids studied by EQCM and acoustic impedance

Ispas, Adriana; Peipmann, Ralf; Bund, Andreas; Efimov, Igor

doi:10.1016/j.electacta.2009.03.056

Cited by 48 publications

(30 citation statements)

References 33 publications

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“…Hillman and co-workers have reported an increase in the stiffness of PANI films due to insertion of anions and the expulsion of the solvent molecules [12,34]. Bund et al observed that the influx of anions may increase the stiffness of PEDOT film and the variations of G´ and G" were correlated with concentrations of charged species within film [35,36]. It is considered that such viscoelastic changes are somewhat associated with the electrochemical performance of the film, as the flux of ions and solvent during the charge-discharge process can modify the intermolecular interactions between polymer chains, which in turn substantially affect the film viscoelasticity.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and viscoelastic evolution of dodecyl sulfate-doped polypyrrole films during electrochemical cycling

Gao

Sel

Perrot

2017

Electrochimica Acta

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To cite this version:Wanli Gao, Ozlem Sel, Hubert Perrot. Electrochemical and viscoelastic evolution of dodecyl sulfatedoped polypyrrole films during electrochemical cycling. Electrochimica Acta, Elsevier, 2017, 233, pp.262 -273. 10 ABSTRACT:The correlation between electrochemical and viscoelastic properties of electrodeposited dodecylsulfate-doped polypyrrole (PPy-DS) during electrochemical cycling process was described through combining electrochemical quartz-crystal microbalance (EQCM), ac-electrogravimetric characterizations and electroacoustic measurements. As the PPy-DS electrode evolves during the course of consecutive cycling in aqueous NaCl electrolyte, the film exhibits (i) an obvious ion-selective transition from cations to anions in the charge compensation process; (ii) an inferior electrochemical performance accompanied with increased stiffness (increased storage moduli, G´); and (iii) depleted capability of ionic exchange through film/electrolyte interface. PPy-DS conducting polymer electrodes (CPEs) are of interest in energy storage and the relationship between electrochemical and viscoelastic properties during electrochemical cycling process is essential for promoting the performance of these devices. In this perspective, ac-electrogravimetry combined with electroacoustic measurements can be suggested as an alternative method to synchronously probe the electrochemical and mechanical evolution and has the potential to offer a generalized route to study aging mechanism of CPEs.

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Section: Introductionmentioning

confidence: 99%

Electrochemical and viscoelastic evolution of dodecyl sulfate-doped polypyrrole films during electrochemical cycling

Gao

Sel

Perrot

2017

Electrochimica Acta

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“…The frequency (Δf) decreases approximately linearly at these anodic potentials (Fig. 4 (b)), which indicates the anion doping (p-doping) [39]. The subsequent cathodic waves from 1.4 to 1.8 V (III) and 0.35 to 0.65 V (IV) vs Al/Al(III) show the de-doping , and c change of damping (Δw, solid line) depending on potential of the system PEDOT (0.2 cm 2 ) on a gold resonator (WE) and aluminum wire (CE and RE) in Lewis acidic ionic liquid at 100 mV s −1 and 28°C Table 1 Calculated values for molar mass (M doped anion ) of the doped and de-doped anion species in PEDOT, electro-polymerized on the gold electrode of a quartz crystal, in the listed potential ranges (ΔE) of the cyclic voltammogram (Fig.…”

Section: Pedot Could Also Been Doped With Alclmentioning

confidence: 99%

“…4 (a)). Simultaneously, the changes of the resonance frequency [39] (different resonance frequencies of the loaded and unloaded quartz crystal) (Δf) of the quartz crystal were measured (Fig. 4 (b)).…”

Section: Determination Of the Anion Doping Speciesmentioning

confidence: 99%

Preparation and characterization of a rechargeable battery based on poly-(3,4-ethylenedioxythiophene) and aluminum in ionic liquids

Schoetz

Ueda

Bund

et al. 2017

J Solid State Electrochem

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This paper presents a feasibility study of a nonaqueous rechargeable battery based on aluminum and poly-(3,4-ethylenedioxythiophene) conductive polymer in a chloroaluminate ionic liquid. The polymer was electrodeposited on a vitreous carbon working electrode in a chloride aqueous solution and the structure was analyzed by scanning electron microscopy. The doping/de-doping mechanism of chloride ions into the polymer structure was studied using a quartz crystal microbalance and cyclic voltammetry. The deposition/ dissolution of the aluminum negative electrode were investigated by electrochemical and microscopic methods. Performance data were obtained with a laboratory-scale aluminum-conductive polymer battery at constant current showing an average cell discharge voltage of 1 V and specific energies of at least 84 Wh kg −1 referred to the mass of the polymer and aluminum. The system is novel and the paper outlines further research to improve the cell performance.

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“…Recently, ionic liquids (ILs) have been also employed as suitable media for EDOT polymerization [4]. The properties of the resulting polymers were characterized as a function of the IL used for this strategy [5]. ILs act simultaneously as the solvent and supporting electrolyte and their characteristics affect the rapidity of the electropolymerization process as well as the morphology and conductivity of the resulting polymer.…”

Section: Introductionmentioning

confidence: 99%

A novel hybrid platform for the preparation of disposable enzyme biosensors based on poly(3,4-ethylenedioxythiophene) electrodeposition in an ionic liquid medium onto gold nanoparticles-modified screen-printed electrodes

Serafín

Agüı́

Yáñez‐Sedeño

et al. 2011

Journal of Electroanalytical Chemistry

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On the p-doping of PEDOT layers in various ionic liquids studied by EQCM and acoustic impedance

Cited by 48 publications

References 33 publications

Electrochemical and viscoelastic evolution of dodecyl sulfate-doped polypyrrole films during electrochemical cycling

Electrochemical and viscoelastic evolution of dodecyl sulfate-doped polypyrrole films during electrochemical cycling

Preparation and characterization of a rechargeable battery based on poly-(3,4-ethylenedioxythiophene) and aluminum in ionic liquids

A novel hybrid platform for the preparation of disposable enzyme biosensors based on poly(3,4-ethylenedioxythiophene) electrodeposition in an ionic liquid medium onto gold nanoparticles-modified screen-printed electrodes

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