Anion exchange membranes composed of perfluoroalkylene chains and ammonium-functionalized oligophenylenes

Hideaki Ono; Junpei Miyake; Shigehumi Shimada; Makoto Uchida; Kenji Miyatake

doi:10.1039/c5ta06454f

Anion exchange membranes composed of perfluoroalkylene chains and ammonium-functionalized oligophenylenes

Hideaki Ono, Junpei Miyake, Shigehumi Shimada, Makoto Uchida, Kenji Miyatake^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

61 Citations (Scopus)

Abstract

A novel series of ammonium-containing copolymers (QPAFs) were synthesized as anion exchange membranes for alkaline fuel cell applications. The precursor copolymers (M_w = 28.3-90.1 kDa) composed of perfluoroalkylene and phenylene groups were obtained by a nickel promoted polycondensation reaction. Chloromethylation and quaternization reactions of the precursors provided thin and ductile QPAF membranes with ion exchange capacity (IEC) ranging from 0.79 to 1.74 meq g^-1. The QPAF membranes exhibited a phase-separated morphology based on the hydrophilic/hydrophobic differences in the main chain structure. The QPAF membrane with an optimized copolymer composition and IEC = 1.26 meq g^-1 showed high hydroxide ion conductivity (95.5 mS cm^-1 in water at 80 °C), excellent mechanical properties (large elongation at break (218%)), and reasonable alkaline stability at 80 °C. An alkaline fuel cell using the QPAF as the membrane and electrode binder achieved the maximum power density of 139 mW cm^-2 at a current density of 420 mA cm^-2.

Original language	English
Pages (from-to)	21779-21788
Number of pages	10
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	43
DOIs	https://doi.org/10.1039/c5ta06454f
Publication status	Published - 2015
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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10.1039/c5ta06454f

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title = "Anion exchange membranes composed of perfluoroalkylene chains and ammonium-functionalized oligophenylenes",

abstract = "A novel series of ammonium-containing copolymers (QPAFs) were synthesized as anion exchange membranes for alkaline fuel cell applications. The precursor copolymers (Mw = 28.3-90.1 kDa) composed of perfluoroalkylene and phenylene groups were obtained by a nickel promoted polycondensation reaction. Chloromethylation and quaternization reactions of the precursors provided thin and ductile QPAF membranes with ion exchange capacity (IEC) ranging from 0.79 to 1.74 meq g-1. The QPAF membranes exhibited a phase-separated morphology based on the hydrophilic/hydrophobic differences in the main chain structure. The QPAF membrane with an optimized copolymer composition and IEC = 1.26 meq g-1 showed high hydroxide ion conductivity (95.5 mS cm-1 in water at 80 °C), excellent mechanical properties (large elongation at break (218%)), and reasonable alkaline stability at 80 °C. An alkaline fuel cell using the QPAF as the membrane and electrode binder achieved the maximum power density of 139 mW cm-2 at a current density of 420 mA cm-2.",

author = "Hideaki Ono and Junpei Miyake and Shigehumi Shimada and Makoto Uchida and Kenji Miyatake",

note = "Publisher Copyright: {\textcopyright} 2015 The Royal Society of Chemistry.",

year = "2015",

doi = "10.1039/c5ta06454f",

language = "English",

volume = "3",

pages = "21779--21788",

journal = "Journal of Materials Chemistry A",

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T1 - Anion exchange membranes composed of perfluoroalkylene chains and ammonium-functionalized oligophenylenes

AU - Ono, Hideaki

AU - Miyake, Junpei

AU - Shimada, Shigehumi

AU - Uchida, Makoto

AU - Miyatake, Kenji

PY - 2015

Y1 - 2015

N2 - A novel series of ammonium-containing copolymers (QPAFs) were synthesized as anion exchange membranes for alkaline fuel cell applications. The precursor copolymers (Mw = 28.3-90.1 kDa) composed of perfluoroalkylene and phenylene groups were obtained by a nickel promoted polycondensation reaction. Chloromethylation and quaternization reactions of the precursors provided thin and ductile QPAF membranes with ion exchange capacity (IEC) ranging from 0.79 to 1.74 meq g-1. The QPAF membranes exhibited a phase-separated morphology based on the hydrophilic/hydrophobic differences in the main chain structure. The QPAF membrane with an optimized copolymer composition and IEC = 1.26 meq g-1 showed high hydroxide ion conductivity (95.5 mS cm-1 in water at 80 °C), excellent mechanical properties (large elongation at break (218%)), and reasonable alkaline stability at 80 °C. An alkaline fuel cell using the QPAF as the membrane and electrode binder achieved the maximum power density of 139 mW cm-2 at a current density of 420 mA cm-2.

AB - A novel series of ammonium-containing copolymers (QPAFs) were synthesized as anion exchange membranes for alkaline fuel cell applications. The precursor copolymers (Mw = 28.3-90.1 kDa) composed of perfluoroalkylene and phenylene groups were obtained by a nickel promoted polycondensation reaction. Chloromethylation and quaternization reactions of the precursors provided thin and ductile QPAF membranes with ion exchange capacity (IEC) ranging from 0.79 to 1.74 meq g-1. The QPAF membranes exhibited a phase-separated morphology based on the hydrophilic/hydrophobic differences in the main chain structure. The QPAF membrane with an optimized copolymer composition and IEC = 1.26 meq g-1 showed high hydroxide ion conductivity (95.5 mS cm-1 in water at 80 °C), excellent mechanical properties (large elongation at break (218%)), and reasonable alkaline stability at 80 °C. An alkaline fuel cell using the QPAF as the membrane and electrode binder achieved the maximum power density of 139 mW cm-2 at a current density of 420 mA cm-2.

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U2 - 10.1039/c5ta06454f

DO - 10.1039/c5ta06454f

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VL - 3

SP - 21779

EP - 21788

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 43

ER -

Anion exchange membranes composed of perfluoroalkylene chains and ammonium-functionalized oligophenylenes

Abstract

ASJC Scopus subject areas

UN SDGs

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