Synthesis of different new copolyimides and influence of different molar ratios of diamines and dianhydride on pseudocapacitance performance of p-type conductive polymer

Shahrivari, Somaye; Kowsari, Elaheh; Shockravi, Abbas; Ehsani, Ali

doi:10.1016/j.jelechem.2019.02.024

Cited by 11 publications

(2 citation statements)

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Section: Resultsmentioning

confidence: 99%

“…The electrochemical impedance spectroscopy (EIS) analysis has been accredited as one of the principal methods examining the fundamental behavior of electrode materials for SCs. [68][69][70][71][72][73][74][75][76] In this work, the impedance of the POAP/CTS electrode was measured in the frequency range of 0.1 Hz to 100 kHz at open circuit potential with 5 mV ac perturbation (Figure 8). The electrodes Nyquist plots consisted of a semicircular arc in the high-frequency section and a subvertical line in the low-frequency section.…”

Section: Electrosynthesis Of Poap/cts Composite Filmsmentioning

confidence: 99%

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Environment‐friendly electrodes using biopolymer chitosan/poly ortho aminophenol with enhanced electrochemical behavior for use in energy storage devices

et al. 2019

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Significant electrochemical properties improvement of poly ortho aminophenol (POAP) as conductive polymer and simultaneously as active electrode of electrochemical supercapacitor through fabricated POAP composite film in the presence of biopolymer chitosan (CTS) with porous structure was obtained. Nanocomposite morphology and information about POAP‐CTS interaction in the synthesized thin films were examined via scanning electron microscope. The surface area that depends on the porosity morphology was examined by Brunauere‐Emmette‐Teller (BET) analysis. Accordingly, the BET surface area, mean pore diameters, and single point total pore volume were measured as 39.044 m2 g−1, 19.68 nm, and 0.192 cm3 g−1, respectively. Electrochemical measurements like galvanostatic charge‐discharge experiments, cyclic voltammetry, and electrochemical impedance spectroscopy were investigated to examine the performance of the electrosynthesized composite (POAP/CTS) film. And also, the specific charge obtained as 345 F/g for POAP/CTS. In this work, a new considerable efficient polymeric composite in electrochemical redox capacitors with considerable advantages including ease synthesis, high active surface area, and stability in an aqueous electrolyte was introduced. Analysis of the quantum theory of atoms‐in‐molecules results shows that the chitosan system can be categorized into n‐type‐like (electron density donor) and p‐type‐like (electron density acceptor) sections and thus the parallel (in xy/yx plan) and perpendicular (in xz/yz plan) intramolecular sections have different electronic behaviors/electro‐chemical characterizations in molecule.

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Section: Resultsmentioning

confidence: 99%