Characteristics of polyaniline electrosynthesized in propylene carbonate medium in the presence of di- and trichloroacetic acids

Abstract

No presente trabalho a caracterização de polianilina eletrosintetizada em meio de carbonato de propileno na presença dos ácidos di-e tricloroacéticos foi realizada usando diferentes técnicas. A resposta eletroquímica por voltametria cíclica mostrou os processos redox devido à formação de polaron e bipolaron e à degradação do polímero. A caracterização usando as espectroscopias no infravermelho e ultravioleta-visível indica que os polímeros estão na forma de sal emeraldina com ânions perclorato incorporados. Os filmes produzidos com ambos os ácidos em carbonato de propileno apresentam morfologia compacta como observado por microscopia eletrônica de varredura. Através de testes de filmes de polianilina produzidos em condições selecionadas em um ambiente correspondente a uma bateria de lítio foi observado que estes apresentam uma eficiência coulômbica elevada promissora para aplicações em baterias.In the present work the characterization of polyaniline electrosynthesized in propylene carbonate medium in the presence of di-and trichloroacetic acids was performed using different techniques. The electrochemical response by cyclic voltammetry showed redox processes due to the formation of polaron and bipolaron and polymer degradation. The characterization by infrared and UVvisible spectroscopies indicated that the polymers are in the emeraldine salt form with perchlorate anions incorporated. The films produced with both acids in propylene carbonate media presented a compact morphology as observed by scanning electron microscopy. By testing the polyaniline film produced in selected conditions in a lithium battery environment it was found that it presents a high coulombic efficiency, promising for battery applications.

Effects of 160 MeV Ni12+ion irradiation on HCl doped polyaniline electrode

“…The broadening of the carrier absorption peak may occur due to an increase in the defect sites of the polymer chains upon SHI irradiation. The shift of absorption bands towards higher wavelength regions may also be attributed to the formation of a polaronic band in the polyaniline film upon irradiation [30]. The increase in absorption and peak shift towards higher wavelength is an indication of the decreased energy band gap of the polyaniline films, which gives rise to an increase in the dc conductivity of the films.…”

Synthesis and characterization of a ferrocene‐modified, polyaniline‐like conducting polymer

“…However, the peak at 1467 cm −1 was from NBN (where B is the benzene ring). The peaks at 1129 and 1018 cm −1 became asymmetric, and the absorption band at 1129 cm −1 became stronger than the similar peak in the spectrum of FcA, this was due to NQN (where Q is the quinoid ring) and perchlorate anion incorporation in copolymer . The characteristic absorption peaks almost appeared in the case of pure PANI.…”

Preparation of a P(FcA-co-ANI)/graphene composite for application in supercapacitors

“…The peaks at 1129 and 1018 cm À1 were asymmetric. The peak at 1129 cm À1 was stronger than the corresponding peak in the spectrum of FcA, owing to the N¼Q¼N vibration 27 and perchlorate anion incorporation in copolymer 28 (where Q is the quinoid ring). The peak of the framework vibration of the hexatomic ring was observed at 1529 cm À1 and the weak peak at 3236 cm À1 was attributed to residual ÀOH.…”