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A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery

A sulfonated polyimide (SPI)/Nafion blend membrane composed of a designed and synthesized SPI polymer and the commercial Nafion polymer is prepared by a facile solution casting method for vanadium redox flow battery (VRFB). Similar molecular structures of both SPI and Nafion provide good compatibili...

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Autores principales: Li, Jinchao, Liu, Jun, Xu, Wenjie, Long, Jun, Huang, Wenheng, He, Zhen, Liu, Suqin, Zhang, Yaping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8708936/
https://www.ncbi.nlm.nih.gov/pubmed/34940447
http://dx.doi.org/10.3390/membranes11120946
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author Li, Jinchao
Liu, Jun
Xu, Wenjie
Long, Jun
Huang, Wenheng
He, Zhen
Liu, Suqin
Zhang, Yaping
author_facet Li, Jinchao
Liu, Jun
Xu, Wenjie
Long, Jun
Huang, Wenheng
He, Zhen
Liu, Suqin
Zhang, Yaping
author_sort Li, Jinchao
collection PubMed
description A sulfonated polyimide (SPI)/Nafion blend membrane composed of a designed and synthesized SPI polymer and the commercial Nafion polymer is prepared by a facile solution casting method for vanadium redox flow battery (VRFB). Similar molecular structures of both SPI and Nafion provide good compatibility and complementarity of the blend membrane. ATR-FTIR, (1)H-NMR, AFM, and SEM are used to gain insights on the chemical structure and morphology of the blend membrane. Fortunately, the chemical stability of the SPI/Nafion blend membrane is effectively improved compared with reported SPI-based membranes for VRFB applications. In cycling charge-discharge tests, the VRFB with the as-prepared SPI/Nafion blend membrane shows excellent battery efficiencies and operational stability. Above results indicate that the SPI/Nafion blend membrane is a promising candidate for VRFB application. This work opens up a new possibility for fabricating high-performance SPI-based blend membrane by introduction of a polymer with a similar molecular structure and special functional groups into the SPI polymer.
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spelling pubmed-87089362021-12-25 A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery Li, Jinchao Liu, Jun Xu, Wenjie Long, Jun Huang, Wenheng He, Zhen Liu, Suqin Zhang, Yaping Membranes (Basel) Article A sulfonated polyimide (SPI)/Nafion blend membrane composed of a designed and synthesized SPI polymer and the commercial Nafion polymer is prepared by a facile solution casting method for vanadium redox flow battery (VRFB). Similar molecular structures of both SPI and Nafion provide good compatibility and complementarity of the blend membrane. ATR-FTIR, (1)H-NMR, AFM, and SEM are used to gain insights on the chemical structure and morphology of the blend membrane. Fortunately, the chemical stability of the SPI/Nafion blend membrane is effectively improved compared with reported SPI-based membranes for VRFB applications. In cycling charge-discharge tests, the VRFB with the as-prepared SPI/Nafion blend membrane shows excellent battery efficiencies and operational stability. Above results indicate that the SPI/Nafion blend membrane is a promising candidate for VRFB application. This work opens up a new possibility for fabricating high-performance SPI-based blend membrane by introduction of a polymer with a similar molecular structure and special functional groups into the SPI polymer. MDPI 2021-11-29 /pmc/articles/PMC8708936/ /pubmed/34940447 http://dx.doi.org/10.3390/membranes11120946 Text en © 2021 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
Li, Jinchao
Liu, Jun
Xu, Wenjie
Long, Jun
Huang, Wenheng
He, Zhen
Liu, Suqin
Zhang, Yaping
A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery
title A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery
title_full A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery
title_fullStr A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery
title_full_unstemmed A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery
title_short A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery
title_sort sulfonated polyimide/nafion blend membrane with high proton selectivity and remarkable stability for vanadium redox flow battery
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8708936/
https://www.ncbi.nlm.nih.gov/pubmed/34940447
http://dx.doi.org/10.3390/membranes11120946
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