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New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity

New (1−x)CsH(2)PO(4)–xUiO-66 electrolytes with high proton conductivity and thermal stability at 230–250 °C were developed. The phase composition and proton conductivity of nanocomposites (x = 0–0.15) were investigated in detail. As shown, the UiO-66 matrix is thermally and chemically suitable for c...

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Autores principales: Ponomareva, Valentina Georgievna, Shutova, Elena Sergeevna, Kovalenko, Konstantin Aleksandrovich, Fedin, Vladimir Petrovich
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9736466/
https://www.ncbi.nlm.nih.gov/pubmed/36500478
http://dx.doi.org/10.3390/molecules27238387
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author Ponomareva, Valentina Georgievna
Shutova, Elena Sergeevna
Kovalenko, Konstantin Aleksandrovich
Fedin, Vladimir Petrovich
author_facet Ponomareva, Valentina Georgievna
Shutova, Elena Sergeevna
Kovalenko, Konstantin Aleksandrovich
Fedin, Vladimir Petrovich
author_sort Ponomareva, Valentina Georgievna
collection PubMed
description New (1−x)CsH(2)PO(4)–xUiO-66 electrolytes with high proton conductivity and thermal stability at 230–250 °C were developed. The phase composition and proton conductivity of nanocomposites (x = 0–0.15) were investigated in detail. As shown, the UiO-66 matrix is thermally and chemically suitable for creating composites based on CsH(2)PO(4). The CsH(2)PO(4) crystal structure remains, but the degree of salt crystallinity changes in nanocomposites. As a result of interface interaction, dispersion, and partial salt amorphization, the proton conductivity of the composite increases by two orders of magnitude in the low-temperature range (up to 200 °C), depending on the UiO-66 fraction, and goes through a maximum. At higher temperatures, up to 250 °C, the conductivity of nanocomposites is close to the superprotonic values of the original salt at low UiO-66 values; then, it decreases linearly within one order of magnitude and drops sharply at x > 0.07. The stability of CsH(2)PO(4)-UiO-66 composites with high proton conductivity was shown. This creates prospects for their use as proton membranes in electrochemical devices.
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spelling pubmed-97364662022-12-11 New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity Ponomareva, Valentina Georgievna Shutova, Elena Sergeevna Kovalenko, Konstantin Aleksandrovich Fedin, Vladimir Petrovich Molecules Article New (1−x)CsH(2)PO(4)–xUiO-66 electrolytes with high proton conductivity and thermal stability at 230–250 °C were developed. The phase composition and proton conductivity of nanocomposites (x = 0–0.15) were investigated in detail. As shown, the UiO-66 matrix is thermally and chemically suitable for creating composites based on CsH(2)PO(4). The CsH(2)PO(4) crystal structure remains, but the degree of salt crystallinity changes in nanocomposites. As a result of interface interaction, dispersion, and partial salt amorphization, the proton conductivity of the composite increases by two orders of magnitude in the low-temperature range (up to 200 °C), depending on the UiO-66 fraction, and goes through a maximum. At higher temperatures, up to 250 °C, the conductivity of nanocomposites is close to the superprotonic values of the original salt at low UiO-66 values; then, it decreases linearly within one order of magnitude and drops sharply at x > 0.07. The stability of CsH(2)PO(4)-UiO-66 composites with high proton conductivity was shown. This creates prospects for their use as proton membranes in electrochemical devices. MDPI 2022-12-01 /pmc/articles/PMC9736466/ /pubmed/36500478 http://dx.doi.org/10.3390/molecules27238387 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
Ponomareva, Valentina Georgievna
Shutova, Elena Sergeevna
Kovalenko, Konstantin Aleksandrovich
Fedin, Vladimir Petrovich
New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity
title New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity
title_full New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity
title_fullStr New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity
title_full_unstemmed New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity
title_short New Type of Nanocomposite CsH(2)PO(4)-UiO-66 Electrolyte with High Proton Conductivity
title_sort new type of nanocomposite csh(2)po(4)-uio-66 electrolyte with high proton conductivity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9736466/
https://www.ncbi.nlm.nih.gov/pubmed/36500478
http://dx.doi.org/10.3390/molecules27238387
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