Impedance measurements at thin polyaniline films – the influence of film morphology

Bandeira, Merlin C. E.; Holze, Rudolf

doi:10.1007/s00604-006-0586-x

Cited by 15 publications

(12 citation statements)

References 39 publications

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“…9 is based on a model where the double layer capacity (CPE1) is found in parallel to R ct with the redox-active material CPE2 acting as the electrode (material). Based on the consistently better fit with circuit b (which also agrees with the circuit used for the polymercoated electrode before [104]; a typical result is shown in Fig. 10), results obtained with circuit b are listed in Table 4 (averages of repeated measurements with two electrodes each).…”

Section: Fig Impedance Results With Equivalent Circuit Insupporting

confidence: 58%

“…The electrode studied here closely resembles an electrode composed of an intrinsically conducting polymer deposited on an electronically conducting substrate. Such electrodes have been frequently suggested for electrochemical energy storage applications (for an overview, see [103]); they have been studied extensively with impedance measurements [104]. Following the considerations provided in the latter report, we have examined two modified equivalent circuits depicted in Fig.…”

Section: Fig Impedance Results With Equivalent Circuit Inmentioning

confidence: 99%

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How to measure and report the capacity of electrochemical double layers, supercapacitors, and their electrode materials

Xie

Roscher

et al. 2020

J Solid State Electrochem

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Relevant fundamentals of the electrochemical double layer and supercapacitors utilizing the interfacial capacitance as well as superficial redox processes at the electrode/solution interface are briefly reviewed. Experimental methods for the determination of the capacity of electrochemical double layers, of charge storage electrode materials for supercapacitors, and of supercapacitors are discussed and compared. Intrinsic limitations and pitfalls are indicated; popular errors, misconceptions, and mistakes are evaluated. The suitability of available methods is discussed, and practical recommendations are provided.

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Section: Fig Impedance Results With Equivalent Circuit Insupporting

confidence: 58%

Section: Fig Impedance Results With Equivalent Circuit Inmentioning

confidence: 99%

How to measure and report the capacity of electrochemical double layers, supercapacitors, and their electrode materials

Xie

Roscher

et al. 2020

J Solid State Electrochem

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“…Cyclic voltammetry has been applied to study the redox reactions of PANI films deposited on platinum and to evaluate the films pseudocapacitances. Electrochemical impedance spectroscopy has been proven to be a valuable method in the study of electroactive polyaniline films [16][17][18][19][20] and it was the method of choice for studying electrical resistance, double layer capacitance and pseudocapacitance of polyaniline films.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the electrochemical synthesis and properties of polyaniline films

Pleşu

Kellenberger

Mihali

et al. 2010

Journal of Non-Crystalline Solids

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“…However, the value for PANI/PVAc (1:1) was twice compared to PANI/PMMA (1:1). Likely, this could be ascribed to the higher electronic conductivity of PANI/PVAc that in turn enabled a substantially higher fraction of the polymer mats to become electrochemically active, i.e., to form an active double layer in contact with the solution [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

Self Standing Mats of Blended Polyaniline Produced by Electrospinning

et al. 2021

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Conducting nanofibers of polyaniline (PANI) doped with camphor-10-sulfonic acid (HCSA) and blended with different polymers, such as polymethyl methacrylate (PMMA) and polyvinyl acetate (PVAc), have been fabricated using the electrospinning technique. Scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA) were utilized to characterize the morphology and the thermal stability of PANI-blended fibers. An extensive study was performed to understand the copolymer influence on both the structural and surface properties of the realized conductive thin films. Samples main electrical characteristics, as conductivity, specific capacitance and electrochemical performances were tested. The better mats were obtained with the use of PVAc copolymer, which showed a conductivity value two orders of magnitude higher than the PMMA system. Aiming at further improving the electrochemical features of these blended mats, hybrid fibers based on PANI/PVAc/graphene oxide and PANI/PVAc/iron oxide were also produced and characterized. The obtained mats were potentially addressed to numerous practical fields, including sensors, health applications, smart devices and multifunctional textile materials.

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Impedance measurements at thin polyaniline films – the influence of film morphology

Cited by 15 publications

References 39 publications

How to measure and report the capacity of electrochemical double layers, supercapacitors, and their electrode materials

How to measure and report the capacity of electrochemical double layers, supercapacitors, and their electrode materials

Effect of temperature on the electrochemical synthesis and properties of polyaniline films

Self Standing Mats of Blended Polyaniline Produced by Electrospinning

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