The determination of effective diffusion coefficient from the electrochemical impedance spectra of composite poly (vinyl alcohol) membranes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F19%3A43956216" target="_blank" >RIV/49777513:23640/19:43956216 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11025/35978" target="_blank" >http://hdl.handle.net/11025/35978</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/ep.13195" target="_blank" >10.1002/ep.13195</a>
Alternative languages
Result language
angličtina
Original language name
The determination of effective diffusion coefficient from the electrochemical impedance spectra of composite poly (vinyl alcohol) membranes
Original language description
This study presents the effect of swelling on effective diffusion coefficient of the composite poly(vinyl alcohol) (PVA) membranes through electrochemical impedance spectroscopy. The PVA based membranes were cross‐linked by sulfosuccinic acid (SSA) or tetraethylorthosilicate (TEOS) to improve the ionic conductivity and suppress the swelling. The impedance spectra of the synthesized membranes were recorded and then fitted using Randles circuit. The values of the Warburg element were analyzed and the effective diffusion coefficient was calculated for membranes in dry or wet state. Obtained values were compared with those of the Nafion NR 212 and pure PVA. A significant dependency of effective diffusion coefficient on dimension change caused by swelling was measured. In case of SSA cross‐linking, an improvement of ionic conductivity by chemical modification was observed. However, the highly hydrophilic behavior of PVA SSA samples is limiting further utilization of membrane in applications such as methanol fuel cells. To improve the stability of membrane in the wet environment, the composite PVA SSA TEOS membrane was prepared.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Progress and Sustainable Energy
ISSN
1944-7442
e-ISSN
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Volume of the periodical
38
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
"NESTRÁNKOVÁNO"
UT code for WoS article
000486024400054
EID of the result in the Scopus database
2-s2.0-85062367993