Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications

Lee, Seunghyun; Lee, Hyejin; Yang, Tae-Hyun; Bae, Byungchan; Tran, Nguyen Anh Thu; Cho, Younghyun; Jung, Namgee; Shin, Dongwon

doi:10.3390/membranes10110306

Open AccessArticle

Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications

by

Seunghyun Lee

^1,2,

Hyejin Lee

¹,

Tae-Hyun Yang

¹,

Byungchan Bae

^1,3

,

Nguyen Anh Thu Tran

⁴,

Younghyun Cho

⁴,

Namgee Jung

^2,*

and

Dongwon Shin

^1,*

¹

Fuel Cell Laboratory, Korea Institute of Energy Research, Daejoen 34129, Korea

²

Graduate School of Energy Science and Technology, Chungnam National University, Daejeon 35015, Korea

³

Department of Renewable Energy Engineering, University of Science and Technology, Daejeon 34113, Korea

⁴

Department of Energy Systems Engineering, Soonchunhyang University, Asan 31538, Korea

^*

Authors to whom correspondence should be addressed.

Membranes 2020, 10(11), 306; https://doi.org/10.3390/membranes10110306

Submission received: 28 September 2020 / Revised: 19 October 2020 / Accepted: 23 October 2020 / Published: 26 October 2020

(This article belongs to the Special Issue Polymer Electrolyte Membranes)

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Abstract

Perfluorinated polymers are widely used in polymer electrolyte membranes because of their excellent ion conductivity, which are attributed to the well-defined morphologies resulting from their extremely hydrophobic main-chains and flexible hydrophilic side-chains. Perfluorinated polymers containing quaternary ammonium groups were prepared from Nafion- and Aquivion-based sulfonyl fluoride precursors by the Menshutkin reaction to give anion exchange membranes. Perfluorinated polymers tend to exhibit poor solubility in organic solvents; however, clear polymer dispersions and transparent membranes were successfully prepared using N-methyl-2-pyrrolidone at high temperatures and pressures. Both perfluorinated polymer-based membranes exhibited distinct hydrophilic-hydrophobic phase-separated morphologies, resulting in high ion conductivity despite their low ion exchange capacities and limited water uptake properties. Moreover, it was found that the capacitive deionization performances and stabilities of the perfluorinated polymer membranes were superior to those of the commercial Fumatech membrane.

Keywords: perfluorinated polymer; anion exchange membrane; morphology; ion conductivity; flow-electrode capacity deionization

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MDPI and ACS Style

Lee, S.; Lee, H.; Yang, T.-H.; Bae, B.; Tran, N.A.T.; Cho, Y.; Jung, N.; Shin, D. Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications. Membranes 2020, 10, 306. https://doi.org/10.3390/membranes10110306

AMA Style

Lee S, Lee H, Yang T-H, Bae B, Tran NAT, Cho Y, Jung N, Shin D. Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications. Membranes. 2020; 10(11):306. https://doi.org/10.3390/membranes10110306

Chicago/Turabian Style

Lee, Seunghyun, Hyejin Lee, Tae-Hyun Yang, Byungchan Bae, Nguyen Anh Thu Tran, Younghyun Cho, Namgee Jung, and Dongwon Shin. 2020. "Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications" Membranes 10, no. 11: 306. https://doi.org/10.3390/membranes10110306

APA Style

Lee, S., Lee, H., Yang, T.-H., Bae, B., Tran, N. A. T., Cho, Y., Jung, N., & Shin, D. (2020). Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications. Membranes, 10(11), 306. https://doi.org/10.3390/membranes10110306

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications

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