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Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes

Nanocomposite polymer electrolytes (NPEs) were obtained using gellan gum (GG) and 1 to 40 wt.% of montmorillonite (Na(+)SYN-1) clay. The NPEs were crosslinked with formaldehyde, plasticized with glycerol, and contained LiClO(4). The samples were characterized by impedance spectroscopy, thermal analy...

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Autores principales: Caliman, Willian Robert, Sentanin, Franciani Cassia, Sabadini, Rodrigo Cesar, Donoso, Jose Pedro, Magon, Claudio Jose, Pawlicka, Agnieszka
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9785073/
https://www.ncbi.nlm.nih.gov/pubmed/36557855
http://dx.doi.org/10.3390/molecules27248721
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author Caliman, Willian Robert
Sentanin, Franciani Cassia
Sabadini, Rodrigo Cesar
Donoso, Jose Pedro
Magon, Claudio Jose
Pawlicka, Agnieszka
author_facet Caliman, Willian Robert
Sentanin, Franciani Cassia
Sabadini, Rodrigo Cesar
Donoso, Jose Pedro
Magon, Claudio Jose
Pawlicka, Agnieszka
author_sort Caliman, Willian Robert
collection PubMed
description Nanocomposite polymer electrolytes (NPEs) were obtained using gellan gum (GG) and 1 to 40 wt.% of montmorillonite (Na(+)SYN-1) clay. The NPEs were crosslinked with formaldehyde, plasticized with glycerol, and contained LiClO(4). The samples were characterized by impedance spectroscopy, thermal analyses (TGA and DSC), UV-vis transmittance and reflectance, X-ray diffraction (XRD), and continuous-wave electron paramagnetic resonance (CW-EPR). The NPEs of GG and 40 wt.% LiClO(4) showed the highest conductivity of 2.14 × 10(−6) and 3.10 × 10(−4) S/cm at 30 and 80 °C, respectively. The samples with 10 wt.% Na(+)SYN-1 had a conductivity of 1.86 × 10(−5) and 3.74 × 10(−4) S/cm at 30 and 80 °C, respectively. TGA analyses revealed that the samples are thermally stable up to 190 °C and this did not change with clay addition. The transparency of the samples decreased with the increase in the clay content and at the same time their reflectance increased. Finally, CW-EPR was performed to identify the coordination environment of Cu(2+) ions in the GG NPEs. The samples doped with the lowest copper concentration exhibit the typical EPR spectra due to isolated Cu(2+) ions in axially distorted sites. At high concentrations, the spectra become isotropic because of dipolar and exchange magnetic effects. In summary, GG/clay NPEs presented good ionic conductivity results, which qualifies them for electrochemical device applications.
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spelling pubmed-97850732022-12-24 Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes Caliman, Willian Robert Sentanin, Franciani Cassia Sabadini, Rodrigo Cesar Donoso, Jose Pedro Magon, Claudio Jose Pawlicka, Agnieszka Molecules Article Nanocomposite polymer electrolytes (NPEs) were obtained using gellan gum (GG) and 1 to 40 wt.% of montmorillonite (Na(+)SYN-1) clay. The NPEs were crosslinked with formaldehyde, plasticized with glycerol, and contained LiClO(4). The samples were characterized by impedance spectroscopy, thermal analyses (TGA and DSC), UV-vis transmittance and reflectance, X-ray diffraction (XRD), and continuous-wave electron paramagnetic resonance (CW-EPR). The NPEs of GG and 40 wt.% LiClO(4) showed the highest conductivity of 2.14 × 10(−6) and 3.10 × 10(−4) S/cm at 30 and 80 °C, respectively. The samples with 10 wt.% Na(+)SYN-1 had a conductivity of 1.86 × 10(−5) and 3.74 × 10(−4) S/cm at 30 and 80 °C, respectively. TGA analyses revealed that the samples are thermally stable up to 190 °C and this did not change with clay addition. The transparency of the samples decreased with the increase in the clay content and at the same time their reflectance increased. Finally, CW-EPR was performed to identify the coordination environment of Cu(2+) ions in the GG NPEs. The samples doped with the lowest copper concentration exhibit the typical EPR spectra due to isolated Cu(2+) ions in axially distorted sites. At high concentrations, the spectra become isotropic because of dipolar and exchange magnetic effects. In summary, GG/clay NPEs presented good ionic conductivity results, which qualifies them for electrochemical device applications. MDPI 2022-12-09 /pmc/articles/PMC9785073/ /pubmed/36557855 http://dx.doi.org/10.3390/molecules27248721 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Caliman, Willian Robert
Sentanin, Franciani Cassia
Sabadini, Rodrigo Cesar
Donoso, Jose Pedro
Magon, Claudio Jose
Pawlicka, Agnieszka
Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes
title Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes
title_full Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes
title_fullStr Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes
title_full_unstemmed Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes
title_short Improved Conductivity in Gellan Gum and Montmorillonite Nanocomposites Electrolytes
title_sort improved conductivity in gellan gum and montmorillonite nanocomposites electrolytes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9785073/
https://www.ncbi.nlm.nih.gov/pubmed/36557855
http://dx.doi.org/10.3390/molecules27248721
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