Thermal and electrochemical impedance spectroscopy analysis of PAADDA film incorporated with Li2SO4

Ian Pellinca Braga Caetano; Rodrigo de Siqueira Melo; Kênia da Silva  Freitas; Ana Lucia Shiguihara; Jorge Amim Júnior

doi:10.18540/jcecvl9iss8pp16453-01e

Authors

Ian Pellinca Braga Caetano Federal University of Rio de Janeiro-Campus Macaé, Brazil https://orcid.org/0009-0008-8232-7758
Rodrigo de Siqueira Melo Federal University of Rio de Janeiro-Campus Macaé, Brazil https://orcid.org/0000-0002-0816-462X
Kênia da Silva Freitas Federal University of Rio de Janeiro-Campus Macaé, Brazil https://orcid.org/0009-0002-2904-2397
Ana Lucia Shiguihara Federal University of Rio de Janeiro-Campus Macaé, Brazil
Jorge Amim Júnior Federal University of Rio de Janeiro-Campus Macaé, Brazil https://orcid.org/0000-0002-4323-6246

DOI:

https://doi.org/10.18540/jcecvl9iss8pp16453-01e

Keywords:

PAADDA, lithium sulfate, eletrochemistry impedance spectroscopy

Abstract

In this paper, poly(acrylamide-co-dialidimethylamonium)-PAADDA films containing lithium sulfate (Li₂SO₄) were prepared by casting method from aqueous solutions. The obtained films (pristine PAADDA, PAADDA/Li₂SO₄-0.25% w/w, and PAADDA/Li₂SO₄-0.5% w/w) were characterized by means of attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), thermogravimetric analysis (TGA), and electrochemical impedance spectroscopy (EIS). ATR-FTIR spectra of PAADDA/Li₂SO₄ films showed the main bands of PAADDA and suggested a significative intermolecular interaction between the polymer and Li₂SO₄. TGA curves displayed that the thermal stability of PAADDA film is dependent on the Li₂SO₄concentration. The ionic conductivity of the films followed the order: PAADDA/Li₂SO₄-0.25% w/w < pristine PAADDA <PAADDA/Li₂SO₄-0.5% w/w.