Electrochemical impedance studies of hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution

R. A. Zoppi; S. P. Nunes

doi:10.1016/S0022-0728(97)00513-5

Electrochemical impedance studies of hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution

R. A. Zoppi^*, S. P. Nunes

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Hybrids of Nafion® and silica were prepared from solution, growing the inorganic phase by hydrolysis/condensation of alkoxy silanes. Using tetraethoxysilane (TEOS) as the inorganic precursor, transparent and rigid films were obtained. Substituting part of the TEOS (20 wt% substitution) by 1,1,3,3 tetramethyl-1,3-diethoxydisiloxane (TMDES) more flexible films were obtained. These films were translucent and showed a phase segregation which was clearly observed by transmission electron microscopy. The ionic conductivity of the hybrids was measured by electrochemical impedance spectroscopy using two stainless steel electrodes, a frequency range of 0.1 to 10⁵ Hz, and temperatures from 25 to 100°C. Samples were also characterized by modulated differential scanning calorimetry.

Original language	English (US)
Pages (from-to)	39-45
Number of pages	7
Journal	Journal of Electroanalytical Chemistry
Volume	445
Issue number	1-2
DOIs	https://doi.org/10.1016/S0022-0728(97)00513-5
State	Published - Mar 31 1998
Externally published	Yes

Keywords

Composites
Hybrid materials
Ionic conductivity
Nafion®

ASJC Scopus subject areas

Analytical Chemistry
General Chemical Engineering
Electrochemistry

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10.1016/S0022-0728(97)00513-5

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title = "Electrochemical impedance studies of hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution",

abstract = "Hybrids of Nafion{\textregistered} and silica were prepared from solution, growing the inorganic phase by hydrolysis/condensation of alkoxy silanes. Using tetraethoxysilane (TEOS) as the inorganic precursor, transparent and rigid films were obtained. Substituting part of the TEOS (20 wt% substitution) by 1,1,3,3 tetramethyl-1,3-diethoxydisiloxane (TMDES) more flexible films were obtained. These films were translucent and showed a phase segregation which was clearly observed by transmission electron microscopy. The ionic conductivity of the hybrids was measured by electrochemical impedance spectroscopy using two stainless steel electrodes, a frequency range of 0.1 to 105 Hz, and temperatures from 25 to 100°C. Samples were also characterized by modulated differential scanning calorimetry.",

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author = "Zoppi, {R. A.} and Nunes, {S. P.}",

year = "1998",

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doi = "10.1016/S0022-0728(97)00513-5",

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journal = "Journal of Electroanalytical Chemistry",

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TY - JOUR

T1 - Electrochemical impedance studies of hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution

AU - Zoppi, R. A.

AU - Nunes, S. P.

PY - 1998/3/31

Y1 - 1998/3/31

N2 - Hybrids of Nafion® and silica were prepared from solution, growing the inorganic phase by hydrolysis/condensation of alkoxy silanes. Using tetraethoxysilane (TEOS) as the inorganic precursor, transparent and rigid films were obtained. Substituting part of the TEOS (20 wt% substitution) by 1,1,3,3 tetramethyl-1,3-diethoxydisiloxane (TMDES) more flexible films were obtained. These films were translucent and showed a phase segregation which was clearly observed by transmission electron microscopy. The ionic conductivity of the hybrids was measured by electrochemical impedance spectroscopy using two stainless steel electrodes, a frequency range of 0.1 to 105 Hz, and temperatures from 25 to 100°C. Samples were also characterized by modulated differential scanning calorimetry.

AB - Hybrids of Nafion® and silica were prepared from solution, growing the inorganic phase by hydrolysis/condensation of alkoxy silanes. Using tetraethoxysilane (TEOS) as the inorganic precursor, transparent and rigid films were obtained. Substituting part of the TEOS (20 wt% substitution) by 1,1,3,3 tetramethyl-1,3-diethoxydisiloxane (TMDES) more flexible films were obtained. These films were translucent and showed a phase segregation which was clearly observed by transmission electron microscopy. The ionic conductivity of the hybrids was measured by electrochemical impedance spectroscopy using two stainless steel electrodes, a frequency range of 0.1 to 105 Hz, and temperatures from 25 to 100°C. Samples were also characterized by modulated differential scanning calorimetry.

KW - Composites

KW - Hybrid materials

KW - Ionic conductivity

KW - Nafion®

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DO - 10.1016/S0022-0728(97)00513-5

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JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

IS - 1-2

ER -

Electrochemical impedance studies of hybrids of perfluorosulfonic acid ionomer and silicon oxide by sol-gel reaction from solution

Abstract

Keywords

ASJC Scopus subject areas

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