Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect

A membrane of high ion selectivity, high stability, and low cost is desirable for vanadium redox flow battery (VRB). In this study, a composite membrane is formed by blending the sulfonated poly (ether ether ketone) with lignin (SPEEK/lignin), and optimized by tailoring the degree of sulfonation. Th...

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Detalles Bibliográficos
Autores principales: Ye, Jiaye, Lou, Xuechun, Wu, Chun, Wu, Sujuan, Ding, Mei, Sun, Lidong, Jia, Chuankun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6240590/
https://www.ncbi.nlm.nih.gov/pubmed/30483496
http://dx.doi.org/10.3389/fchem.2018.00549
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author Ye, Jiaye
Lou, Xuechun
Wu, Chun
Wu, Sujuan
Ding, Mei
Sun, Lidong
Jia, Chuankun
author_facet Ye, Jiaye
Lou, Xuechun
Wu, Chun
Wu, Sujuan
Ding, Mei
Sun, Lidong
Jia, Chuankun
author_sort Ye, Jiaye
collection PubMed
description A membrane of high ion selectivity, high stability, and low cost is desirable for vanadium redox flow battery (VRB). In this study, a composite membrane is formed by blending the sulfonated poly (ether ether ketone) with lignin (SPEEK/lignin), and optimized by tailoring the degree of sulfonation. The incorporation of lignin into the SPEEK matrix provides more proton transport pathway and meanwhile adjusts the water channel to repulse vanadium ions. The VRB cells assembled with the composite membranes exhibit high coulombic efficiency (~99.27%) and impressive energy efficiency (~82.75%). The cells maintain a discharge capacity of ~95% after 100 cycles and ~85% after 200 cycles at 120 mA cm(−2), much higher than the commercial Nafion 212. The SPEEK/lignin composite membranes are promising for application in VRB system.
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spelling pubmed-62405902018-11-27 Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect Ye, Jiaye Lou, Xuechun Wu, Chun Wu, Sujuan Ding, Mei Sun, Lidong Jia, Chuankun Front Chem Chemistry A membrane of high ion selectivity, high stability, and low cost is desirable for vanadium redox flow battery (VRB). In this study, a composite membrane is formed by blending the sulfonated poly (ether ether ketone) with lignin (SPEEK/lignin), and optimized by tailoring the degree of sulfonation. The incorporation of lignin into the SPEEK matrix provides more proton transport pathway and meanwhile adjusts the water channel to repulse vanadium ions. The VRB cells assembled with the composite membranes exhibit high coulombic efficiency (~99.27%) and impressive energy efficiency (~82.75%). The cells maintain a discharge capacity of ~95% after 100 cycles and ~85% after 200 cycles at 120 mA cm(−2), much higher than the commercial Nafion 212. The SPEEK/lignin composite membranes are promising for application in VRB system. Frontiers Media S.A. 2018-11-12 /pmc/articles/PMC6240590/ /pubmed/30483496 http://dx.doi.org/10.3389/fchem.2018.00549 Text en Copyright © 2018 Ye, Lou, Wu, Wu, Ding, Sun and Jia. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Ye, Jiaye
Lou, Xuechun
Wu, Chun
Wu, Sujuan
Ding, Mei
Sun, Lidong
Jia, Chuankun
Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect
title Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect
title_full Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect
title_fullStr Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect
title_full_unstemmed Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect
title_short Ion Selectivity and Stability Enhancement of SPEEK/Lignin Membrane for Vanadium Redox Flow Battery: The Degree of Sulfonation Effect
title_sort ion selectivity and stability enhancement of speek/lignin membrane for vanadium redox flow battery: the degree of sulfonation effect
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6240590/
https://www.ncbi.nlm.nih.gov/pubmed/30483496
http://dx.doi.org/10.3389/fchem.2018.00549
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