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Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells

A new series of partially fluorinated copolymers with varying alkyl side chain length (C3, C6 and C9) and piperidinium head groups have been synthesized and characterized in detail in an effort to improve membrane properties for alkaline fuel cell applications. The copolymers (QPAF4-Cx-pip) provided...

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Autores principales: Koronka, Daniel, Matsumoto, Akinobu, Otsuji, Kanji, Miyatake, Kenji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9075601/
https://www.ncbi.nlm.nih.gov/pubmed/35542305
http://dx.doi.org/10.1039/c9ra07775h
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author Koronka, Daniel
Matsumoto, Akinobu
Otsuji, Kanji
Miyatake, Kenji
author_facet Koronka, Daniel
Matsumoto, Akinobu
Otsuji, Kanji
Miyatake, Kenji
author_sort Koronka, Daniel
collection PubMed
description A new series of partially fluorinated copolymers with varying alkyl side chain length (C3, C6 and C9) and piperidinium head groups have been synthesized and characterized in detail in an effort to improve membrane properties for alkaline fuel cell applications. The copolymers (QPAF4-Cx-pip) provided thin and bendable membranes by solution casting, and achieved high hydroxide ion conductivity up to 97 mS cm(−1) in water at 80 °C. Membrane properties such as water absorbability, conductivity, and mechanical properties were tunable with the side chain length. The copolymer main chain and the piperidinium groups were both alkaline stable and the membranes retained high conductivity in 4 M KOH at 80 °C for as long as 1000 h, however, conductivity was lost in 8 M KOH due to Hofmann degradation of the side chain. QPAF4-C3-pip copolymer with the best-balanced properties as anion exchange membrane functioned well in a hydrogen/oxygen alkaline fuel cell to achieve 226 mW cm(−2) peak power density at 502 mA cm(−2) current density under fully humidified conditions with no back pressure.
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spelling pubmed-90756012022-05-09 Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells Koronka, Daniel Matsumoto, Akinobu Otsuji, Kanji Miyatake, Kenji RSC Adv Chemistry A new series of partially fluorinated copolymers with varying alkyl side chain length (C3, C6 and C9) and piperidinium head groups have been synthesized and characterized in detail in an effort to improve membrane properties for alkaline fuel cell applications. The copolymers (QPAF4-Cx-pip) provided thin and bendable membranes by solution casting, and achieved high hydroxide ion conductivity up to 97 mS cm(−1) in water at 80 °C. Membrane properties such as water absorbability, conductivity, and mechanical properties were tunable with the side chain length. The copolymer main chain and the piperidinium groups were both alkaline stable and the membranes retained high conductivity in 4 M KOH at 80 °C for as long as 1000 h, however, conductivity was lost in 8 M KOH due to Hofmann degradation of the side chain. QPAF4-C3-pip copolymer with the best-balanced properties as anion exchange membrane functioned well in a hydrogen/oxygen alkaline fuel cell to achieve 226 mW cm(−2) peak power density at 502 mA cm(−2) current density under fully humidified conditions with no back pressure. The Royal Society of Chemistry 2019-11-15 /pmc/articles/PMC9075601/ /pubmed/35542305 http://dx.doi.org/10.1039/c9ra07775h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Koronka, Daniel
Matsumoto, Akinobu
Otsuji, Kanji
Miyatake, Kenji
Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells
title Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells
title_full Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells
title_fullStr Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells
title_full_unstemmed Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells
title_short Partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells
title_sort partially fluorinated copolymers containing pendant piperidinium head groups as anion exchange membranes for alkaline fuel cells
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9075601/
https://www.ncbi.nlm.nih.gov/pubmed/35542305
http://dx.doi.org/10.1039/c9ra07775h
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