Electrochemically induced free solvent transfer in thin poly(3,4-ethylenedioxythiophene) films

Agrisuelas, Jerónimo; Gabrielli, C.; Garcı́a-Jareño, J.J.; Perrot, Hubert; Sel, Ozlëm; Vicente, F.

doi:10.1016/j.electacta.2015.02.133

Cited by 19 publications

(11 citation statements)

References 68 publications

(88 reference statements)

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“…As already explained, the solvent molecules were exchanged in the same flux direction with the TBA + but in opposite flux direction with the BF 4 − . Since the solvent transfer occurs at low frequencies after the transfer of anions, the exclusion of the solvent molecules with the insertion of anions could be assumed, in agreement with previous reports in the literature, (i.e., considering V ClO4 − = 47Å 3 and V CH3CN = 37Å 3 , one ClO 4 − can replace approximately one acetonitrile molecule as a result of an exclusion effect [51]).…”

Section: Resultssupporting

confidence: 71%

Charge Storage Properties of Nanostructured Poly (3,4–ethylenedioxythiophene) Electrodes Revealed by Advanced Electrogravimetry

et al. 2019

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PEDOT nanowires (NWs) directly grown on the conducting electrode of quartz resonators enable an advanced electrogravimetric analysis of their charge storage behavior. Electrochemical quartz crystal microbalance (EQCM) and its coupling with electrochemical impedance spectroscopy (ac–electrogravimetry or AC–EG) were used complementarily and reveal that TBA+, BF4− and ACN participate in the charge compensation process with different kinetics and quantity. BF4− anions were dominant in terms of concentration over TBA+ cations and the anion transfer results in the exclusion of the solvent molecules. TBA+ concentration variation in the electrode was small compared to that of the BF4− counterpart. However, Mw of TBA+ is much higher than BF4− (242.3 vs. 86.6 g·mol−1). Thus, TBA+ cations’ gravimetric contribution to the EQCM response was more significant than that of BF4−. Additional contribution of ACN with an opposite flux direction compared with BF4−, led to a net mass gain/lost during a negative/positive potential scan, masking partially the anion response. Such subtleties of the interfacial ion transfer processes were disentangled due to the complementarity of the EQCM and AC–EG methodologies, which were applied here for the characterization of electrochemical processes at the PEDOT NW electrode/organic electrolyte interface.

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Section: Resultssupporting

confidence: 71%

Charge Storage Properties of Nanostructured Poly (3,4–ethylenedioxythiophene) Electrodes Revealed by Advanced Electrogravimetry

et al. 2019

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“…In our experimental conditions, as perchlorate anions have a rather small ionic radius, i.e. 2.25 Å [62], the resulting PEDOT-ClO 4 films are likely to behave as anion exchangers, and this was actually confirmed using ac-electrogravimetry experiments [63]. They show also a granular morphology, as observed on FEG-SEM images (see Figure 1), as well as a high compacity that is required to allow an easy interpretation of thickness variations measured during EC-AFM experiments.…”

Section: Resultssupporting

confidence: 64%

“…V vs. Ag and known to correspond more specifically to cation exchanges, as already shown in literature [63].…”

Section: Resultssupporting

confidence: 55%

Switching of the ion exchange behaviour of PEDOT thin films during a potential cycling: An electrochemical atomic force microscopy study

Mocaër

Pillier

Pailleret

2021

Electrochimica Acta

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“…For these four samples, the CV curves have similar shape and display two characteristic redox peak pairs of PANI in the potential range investigated. Two pairs of redox peaks can be assigned to the leucoemeraldine salt (LS) to emeraldine salt (ES) and ES to pernigraniline salt (PS), and their reverse transitions, respectively . The CV peak current densities and CV peak potentials of redox peaks are recorded and listed in Table .…”

Section: Resultsmentioning

confidence: 99%

Covalent Bonding of PANI and p‐Phenylenediamine‐Functionalized GO Using N,N′‐Dicyclohexylcarbodiimide as Dehydrating Agent for Electrochromic Applications

et al. 2019

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In this paper, a high‐performance organic/inorganic electrochromic material was synthesized by covalent bonding of polyaniline (PANI) and graphene oxide (GO). In the presence of N,N′‐dicyclohexylcarbodiimide (DCC) as dehydrating agent, GO was functionalized by p‐phenylenediamine (PPD) through an amidation reaction. Water‐processable PANI‐GO nanocomposites were prepared by copolymerization of aniline with PPD functionalized GO in the presence of poly(styrene sulfonate) (PSS) dopant in an aqueous medium. The structures and morphologies of PANI‐GO nanocomposites were characterized by Fourier‐transform infrared (FTIR) spectra, Raman spectra, transmission electron microscope (TEM) and scanning electron microscope (SEM). The results show that covalent bonding PANI‐GO nanocomposites possess better electrochemical and electrochromic properties over that of neat PANI. With 3 wt.% GO‐PPD loading, PANI‐GO‐3% exhibits the optimal electrochemical and electrochromic properties, among which the charge‐transfer resistance (RCT) is 29.4 Ω, the optical contrast is 0.72 and coloring/bleaching time is 4.45/4.28 s. Overdose GO‐PPD leads to negative influence on the contrast and switching speed, owing to the ion blocking effect brought by its two‐dimensional nanostructure.

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Electrochemically induced free solvent transfer in thin poly(3,4-ethylenedioxythiophene) films

Cited by 19 publications

References 68 publications

Charge Storage Properties of Nanostructured Poly (3,4–ethylenedioxythiophene) Electrodes Revealed by Advanced Electrogravimetry

Charge Storage Properties of Nanostructured Poly (3,4–ethylenedioxythiophene) Electrodes Revealed by Advanced Electrogravimetry

Switching of the ion exchange behaviour of PEDOT thin films during a potential cycling: An electrochemical atomic force microscopy study

Covalent Bonding of PANI and p‐Phenylenediamine‐Functionalized GO Using N,N′‐Dicyclohexylcarbodiimide as Dehydrating Agent for Electrochromic Applications

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