Intrinsic and Ionic Conduction in Humidity-Sensitive Sulfonated Polyaniline

Doan, Tin Chanh Duc; Ramaneti, R.; Baggerman, Jacob; Tong, Hien D.; Marcelis, Antonius T. M.; Rijn, C.J.M. van

doi:10.1016/j.electacta.2014.01.150

Cited by 21 publications

(12 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure b shows changes in the electronic and ionic conductivities of PEDOT:PSS thin films with humidity . As relative humidity increases, ionic conductivity increases because water facilitates ion transport . Interestingly, the electronic conductivity decreases with humidity up to 40% relative humidity and then recovers and even exceeds the electronic conductivity of the dry film as the relative humidity continues to increase.…”

mentioning

confidence: 99%

“…24 As relative humidity increases, ionic conductivity increases because water facilitates ion transport. 60 Interestingly, the electronic conductivity decreases with humidity up to 40% relative humidity and then recovers and even exceeds the electronic The change in the piezoresistive polarity of PEDOT:PSS thin films upon drying indicates that water absorption induced morphological changes not only impact the static electrical properties of PEDOT:PSS but also affect how the conducting PEDOT domains rearrange under dynamical mechanical deformation. conductivity of the dry film as the relative humidity continues to increase.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Beyond Doping and Charge Balancing: How Polymer Acid Templates Impact the Properties of Conducting Polymer Complexes

Sezen-Edmonds

Loo

2017

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

Polymer acids are increasingly used as dopants/counterions to access and stabilize the electrically conducting states of conducting polymers. Beyond doping and/or charge balancing, these polymer acids also serve as active components that impact the macroscopic properties of the conducting polymer complexes. Judicious selection of the polymer acid at the onset of synthesis or manipulation of the interactions between the polymer acid and the conducting polymer through processing significantly impacts the electrical conductivity, piezoresistivity, electrochromism, mechanical properties, and thermoelectric efficiency of conducting polymers. As polyelectrolytes, these polymer acids enable conducting polymer complexes to transport ions in addition to electrons/holes. Understanding the role of the polymer acid and its interactions with the conducting polymer generates processing-structure-function relationships for conducting polymer/polymer acid complexes, which can help overcome challenges that were associated with these materials, such as low electrical conductivity and sensitivity to humidity, and enable the design of conducting polymer complexes with desired functionalities.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Beyond Doping and Charge Balancing: How Polymer Acid Templates Impact the Properties of Conducting Polymer Complexes

Sezen-Edmonds

Loo

2017

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

show abstract

“…A universal circuit, which can be then customized for all situations encountered in this study, is presented in Table for the water–PANI-CSA system. There, following an interpretation proposed in ref the circuit comprises R 0 as the electrode contact resistance, an R 1 -CPE1 combination associated with the first arc in Figure and related to capacitance of the measurement cell and intrinsic electron/hole conduction in the bulk of PANI grains, and an R 2 -CPE2 element (second arc in Figure ) reflecting charge transport processes across grain boundaries on the surface of the particles. One more component simulating straight line in Figure may be represented by the generalized Warburg element W o , which was chosen on the grounds of similarity with the results shown in Figures – and because it corresponds to the impedance limited by long distance diffusion of charge, probably in the liquid phase.…”

Section: Resultsmentioning

confidence: 90%

“…Thus, in the overwhelming majority of the researches and applications, PANI is treated as a specific semiconducting material where electronic charge transfer occurs mainly through displacement of the holes. At the same time, it is generally recognized that the electrical conduction of PANI has a mixed nature with some contribution of ions due to the involvement of protonic acids into the conduction mechanism of the doped PANI. , The authors of ref denoted this mechanism as proton exchange-assisted conduction of electrons. Thus, electrolyte properties of PANI got into the scope of interest of materials science researchers giving rise to a line of studies focused on the employment of PANI as a solid electrolyte in cation exchange systems, particularly in proton exchange membranes (PEM).…”

Section: Introductionmentioning

confidence: 99%

Impedance Analysis of Polyaniline in Comparison with Some Conventional Solid Electrolytes

et al. 2018

View full text Add to dashboard Cite

Doped polyaniline (PANI) is well-known as an electronic (polaronic) conductor and mostly is used as semiconductor in various applications. However, in the literature there are examples of employment of the acid doped form of PANI as electrolytic filler in proton exchange membranes. In order to distinguish between two types of conduction, in the present study powdered samples of polyaniline, either in the form of emeraldine base (PANI-EB) or in the form doped with camphorsulfonic acid (PANI-CSA), were investigated using impedance spectroscopy both in the dry state and in contact with liquid water. The obtained spectra were compared with the spectra of such conventional solid electrolytes, as zeolites X and ZSM5 and a strong electrolyte boron orthophosphate, acquired in identical conditions. The most important dissimilarity between conventional electrolytes and PANI was that ion diffusion dominates in the impedance response of the formers, whereas the behavior of PANI is under control of electron/hole displacement and the diffusion part is quite inessential. This corroborates the results of analysis of temperature dependence of PANI conductivity, which revealed values of activation energy twice as large as typical solid electrolytes. Equivalent circuits, simulating the impedance responses of all materials, were built up and used to estimate a possible diffusion coefficient of cations in the comparable solids. It was found that the diffusion in a strong electrolyte such as BPO is ∼2 orders of magnitude faster than evaluated for zeolites and ∼4 orders higher than what was PANI estimation. A conclusion was made that the slow cation diffusion both in protonated and in base form of PANI makes them less efficient solid electrolytes than conventional materials.

show abstract

“…Owing to its high hydrophilicity, SPAN is more sensitive to humidity than general conductive polymers. [ 32 ] Atmospheric protons are injected directly into the SPAN molecular chain, as shown in the inset of Figure 1, which generates ionic conduction. Therefore, the electrical properties of SPAN can be controlled by adjusting the humidity.…”

Section: Introductionmentioning

confidence: 99%

In‐Materio Reservoir Computing in a Sulfonated Polyaniline Network

et al. 2021

View full text Add to dashboard Cite

A sulfonated polyaniline (SPAN) organic electrochemical network device (OEND) is fabricated using a simple drop‐casting method on multiple Au electrodes for use in reservoir computing (RC). The SPAN network has humidity‐dependent electrical properties. Under high humidity, the SPAN OEND exhibits mainly ionic conduction, including charging of an electric double layer and ionic diffusion. The nonlinearity and hysteresis of the current–voltage characteristics progressively increase with increasing humidity. The rich dynamic output behavior indicates wide variations for each electrode, which improves the RC performance because of the disordered network. For RC, waveform generation and short‐term memory tasks are realized by a linear combination of outputs. The waveform task accuracy and memory capacity calculated from a short‐term memory task reach 90% and 33.9, respectively. Improved spoken‐digit classification is realized with 60% accuracy by only 12 outputs, demonstrating that the SPAN OEND can manage time series dynamic data operation in RC owing to a combination of rich dynamic and nonlinear electronic properties. The results suggest that SPAN‐based electrochemical systems can be applied for material‐based computing, by exploiting their intrinsic physicochemical behavior.

show abstract

Intrinsic and Ionic Conduction in Humidity-Sensitive Sulfonated Polyaniline

Cited by 21 publications

References 62 publications

Beyond Doping and Charge Balancing: How Polymer Acid Templates Impact the Properties of Conducting Polymer Complexes

Beyond Doping and Charge Balancing: How Polymer Acid Templates Impact the Properties of Conducting Polymer Complexes

Impedance Analysis of Polyaniline in Comparison with Some Conventional Solid Electrolytes

In‐Materio Reservoir Computing in a Sulfonated Polyaniline Network

Contact Info

Product

Resources

About