Eco-friendly non-fluorinated membranes for renewable energy storage

The European Union is studying the possibility of prohibiting the use of fluorinated-based materials which could limit the use of the most studied and used Nafion and Nafion-like membranes for any applications. Therefore, this study focuses on the preparation and performance evaluation of green, non...

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Autores: Mohammed, Mahmoud Mohammed Gomaa, Requena Leal, Iñaki, Elsharkawy , Mohamed Rabeh Mohamed, Rodrigo Rodrigo, Manuel Andrés, Lobato Bajo, Justo
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/42804
Acceso en línea:https://doi.org/10.1016/j.ijhydene.2024.09.431
https://hdl.handle.net/10578/42804
Access Level:acceso abierto
Palabra clave:Chitosan
Chlor-alkali system
Positron annihilation lifetime spectroscopy (PALS)
PVA membranes
Reversible electrochemical cell
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spelling Eco-friendly non-fluorinated membranes for renewable energy storageMohammed, Mahmoud Mohammed GomaaRequena Leal, IñakiElsharkawy , Mohamed Rabeh MohamedRodrigo Rodrigo, Manuel AndrésLobato Bajo, JustoChitosanChlor-alkali systemPositron annihilation lifetime spectroscopy (PALS)PVA membranesReversible electrochemical cellThe European Union is studying the possibility of prohibiting the use of fluorinated-based materials which could limit the use of the most studied and used Nafion and Nafion-like membranes for any applications. Therefore, this study focuses on the preparation and performance evaluation of green, non-fluorinated proton exchange membranes in a chlor-alkali-based reversible electrochemical cell system for renewable energy storage applications. The membranes were prepared by casting and cross-linking of polyvinyl alcohol (PVA) with varying chitosan (CS) concentrations (5–20 wt%), followed by sulfonation using diluted sulfuric acid at room temperature. CS concentrations significantly influenced membranes physicochemical properties, including ion exchange capacity, ionic conductivity, mechanical strength, and water uptake. Positron annihilation lifetime spectroscopy revealed a correlation between free volume properties and other membrane characteristics. A custom-designed 3D-printed electrochemical cell was developed, capable of operating in reversible mode (both electrolysis and fuel cell modes) with a zero-gap configuration. The PVA/CS (20 wt%) membrane outperformed Nafion, exhibiting a lower voltage (4 V vs. 6 V) in electrolysis mode at 50 mA cm?2 and a higher specific power density (2.7 vs. 1.9 mW cm?2 mgPt) in fuel cell mode. The obtained results demonstrate that crosslinked PVA/CS non-fluorinated based membranes can be sulfonated using diluted sulfuric acid and work effectively in reversible chlor-alkali electrochemical cells.The European Union is studying the possibility of prohibiting the use of fluorinated-based materials which could limit the use of the most studied and used Nafion and Nafion-like membranes for any applications. Therefore, this study focuses on the preparation and performance evaluation of green, non-fluorinated proton exchange membranes in a chlor-alkali-based reversible electrochemical cell system for renewable energy storage applications. The membranes were prepared by casting and cross-linking of polyvinyl alcohol (PVA) with varying chitosan (CS) concentrations (5–20 wt%), followed by sulfonation using diluted sulfuric acid at room temperature. CS concentrations significantly influenced membranes physicochemical properties, including ion exchange capacity, ionic conductivity, mechanical strength, and water uptake. Positron annihilation lifetime spectroscopy revealed a correlation between free volume properties and other membrane characteristics. A custom-designed 3D-printed electrochemical cell was developed, capable of operating in reversible mode (both electrolysis and fuel cell modes) with a zero-gap configuration. The PVA/CS (20 wt%) membrane outperformed Nafion, exhibiting a lower voltage (4 V vs. 6 V) in electrolysis mode at 50 mA cm?2 and a higher specific power density (2.7 vs. 1.9 mW cm?2 mgPt) in fuel cell mode. The obtained results demonstrate that crosslinked PVA/CS non-fluorinated based membranes can be sulfonated using diluted sulfuric acid and work effectively in reversible chlor-alkali electrochemical cells.PERGAMON-ELSEVIER SCIENCE LTD202520252024info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.ijhydene.2024.09.431https://hdl.handle.net/10578/42804reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/428042026-05-27T07:36:41Z
dc.title.none.fl_str_mv Eco-friendly non-fluorinated membranes for renewable energy storage
title Eco-friendly non-fluorinated membranes for renewable energy storage
spellingShingle Eco-friendly non-fluorinated membranes for renewable energy storage
Mohammed, Mahmoud Mohammed Gomaa
Chitosan
Chlor-alkali system
Positron annihilation lifetime spectroscopy (PALS)
PVA membranes
Reversible electrochemical cell
title_short Eco-friendly non-fluorinated membranes for renewable energy storage
title_full Eco-friendly non-fluorinated membranes for renewable energy storage
title_fullStr Eco-friendly non-fluorinated membranes for renewable energy storage
title_full_unstemmed Eco-friendly non-fluorinated membranes for renewable energy storage
title_sort Eco-friendly non-fluorinated membranes for renewable energy storage
dc.creator.none.fl_str_mv Mohammed, Mahmoud Mohammed Gomaa
Requena Leal, Iñaki
Elsharkawy , Mohamed Rabeh Mohamed
Rodrigo Rodrigo, Manuel Andrés
Lobato Bajo, Justo
author Mohammed, Mahmoud Mohammed Gomaa
author_facet Mohammed, Mahmoud Mohammed Gomaa
Requena Leal, Iñaki
Elsharkawy , Mohamed Rabeh Mohamed
Rodrigo Rodrigo, Manuel Andrés
Lobato Bajo, Justo
author_role author
author2 Requena Leal, Iñaki
Elsharkawy , Mohamed Rabeh Mohamed
Rodrigo Rodrigo, Manuel Andrés
Lobato Bajo, Justo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Chitosan
Chlor-alkali system
Positron annihilation lifetime spectroscopy (PALS)
PVA membranes
Reversible electrochemical cell
topic Chitosan
Chlor-alkali system
Positron annihilation lifetime spectroscopy (PALS)
PVA membranes
Reversible electrochemical cell
description The European Union is studying the possibility of prohibiting the use of fluorinated-based materials which could limit the use of the most studied and used Nafion and Nafion-like membranes for any applications. Therefore, this study focuses on the preparation and performance evaluation of green, non-fluorinated proton exchange membranes in a chlor-alkali-based reversible electrochemical cell system for renewable energy storage applications. The membranes were prepared by casting and cross-linking of polyvinyl alcohol (PVA) with varying chitosan (CS) concentrations (5–20 wt%), followed by sulfonation using diluted sulfuric acid at room temperature. CS concentrations significantly influenced membranes physicochemical properties, including ion exchange capacity, ionic conductivity, mechanical strength, and water uptake. Positron annihilation lifetime spectroscopy revealed a correlation between free volume properties and other membrane characteristics. A custom-designed 3D-printed electrochemical cell was developed, capable of operating in reversible mode (both electrolysis and fuel cell modes) with a zero-gap configuration. The PVA/CS (20 wt%) membrane outperformed Nafion, exhibiting a lower voltage (4 V vs. 6 V) in electrolysis mode at 50 mA cm?2 and a higher specific power density (2.7 vs. 1.9 mW cm?2 mgPt) in fuel cell mode. The obtained results demonstrate that crosslinked PVA/CS non-fluorinated based membranes can be sulfonated using diluted sulfuric acid and work effectively in reversible chlor-alkali electrochemical cells.
publishDate 2024
dc.date.none.fl_str_mv 2024
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.ijhydene.2024.09.431
https://hdl.handle.net/10578/42804
url https://doi.org/10.1016/j.ijhydene.2024.09.431
https://hdl.handle.net/10578/42804
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv PERGAMON-ELSEVIER SCIENCE LTD
publisher.none.fl_str_mv PERGAMON-ELSEVIER SCIENCE LTD
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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