Flexible Ionic Conjugated Microporous Polymer Membranes for Fast and Selective Ion Transport

Zongyao Zhou; Digambar Shinde; Dong Guo; Li Cao; Reham Al Nuaimi; Yuting Zhang; Linga Enakonda; Zhiping Lai

doi:10.1002/adfm.202108672

Flexible Ionic Conjugated Microporous Polymer Membranes for Fast and Selective Ion Transport

Zongyao Zhou, Digambar Shinde, Dong Guo, Li Cao, Reham Al Nuaimi, Yuting Zhang, Linga Enakonda, Zhiping Lai

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

38 Scopus citations

Abstract

Membranes with fast and selective ion transport have great potential for use in water- and energy-related applications. The structure and material design of the membranes play a key role in improving their performance. Conjugated microporous polymers (CMPs) as emerging membrane materials have shown uniform pore size, high surface area, and excellent chemical stability, but their mechanical properties are poor due to their brittleness. Herein, a flexible ionic CMP membrane with precisely tailored pore architecture and chemistry prepared by a coelectropolymerization (COEP) strategy is reported. The structure contains rigid monomers to maintain structural uniformity and flexible and charged monomers to enhance mechanical flexibility and improve ion selectivity by combining precise size sieving and Donnan effect. The resulting 40 nm thick CMP membranes show equivalent ion conductance compared to the commercial Nafion 117 membrane, but an order of magnitude higher ion selectivity for ion systems such as K+/Mg2+ and Li+/Mg2+.

Original language	English (US)
Pages (from-to)	2108672
Journal	Advanced Functional Materials
DOIs	https://doi.org/10.1002/adfm.202108672
State	Published - Oct 27 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-11-01
Acknowledged KAUST grant number(s): BAS/1/1375-01, URF/1/3769-01
Acknowledgements: The project was supported by the King Abdullah University of Science and Technology (KAUST) under the competitive research grants URF/1/3769-01 and BAS/1/1375-01.

ASJC Scopus subject areas

Biomaterials
Electrochemistry
Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Flexible Ionic Conjugated Microporous Polymer Membranes for Fast and Selective Ion Transport",

abstract = "Membranes with fast and selective ion transport have great potential for use in water- and energy-related applications. The structure and material design of the membranes play a key role in improving their performance. Conjugated microporous polymers (CMPs) as emerging membrane materials have shown uniform pore size, high surface area, and excellent chemical stability, but their mechanical properties are poor due to their brittleness. Herein, a flexible ionic CMP membrane with precisely tailored pore architecture and chemistry prepared by a coelectropolymerization (COEP) strategy is reported. The structure contains rigid monomers to maintain structural uniformity and flexible and charged monomers to enhance mechanical flexibility and improve ion selectivity by combining precise size sieving and Donnan effect. The resulting 40 nm thick CMP membranes show equivalent ion conductance compared to the commercial Nafion 117 membrane, but an order of magnitude higher ion selectivity for ion systems such as K+/Mg2+ and Li+/Mg2+.",

author = "Zongyao Zhou and Digambar Shinde and Dong Guo and Li Cao and Nuaimi, {Reham Al} and Yuting Zhang and Linga Enakonda and Zhiping Lai",

note = "KAUST Repository Item: Exported on 2021-11-01 Acknowledged KAUST grant number(s): BAS/1/1375-01, URF/1/3769-01 Acknowledgements: The project was supported by the King Abdullah University of Science and Technology (KAUST) under the competitive research grants URF/1/3769-01 and BAS/1/1375-01.",

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doi = "10.1002/adfm.202108672",

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AU - Zhou, Zongyao

AU - Shinde, Digambar

AU - Guo, Dong

AU - Cao, Li

AU - Nuaimi, Reham Al

AU - Zhang, Yuting

AU - Enakonda, Linga

AU - Lai, Zhiping

N1 - KAUST Repository Item: Exported on 2021-11-01 Acknowledged KAUST grant number(s): BAS/1/1375-01, URF/1/3769-01 Acknowledgements: The project was supported by the King Abdullah University of Science and Technology (KAUST) under the competitive research grants URF/1/3769-01 and BAS/1/1375-01.

PY - 2021/10/27

Y1 - 2021/10/27

N2 - Membranes with fast and selective ion transport have great potential for use in water- and energy-related applications. The structure and material design of the membranes play a key role in improving their performance. Conjugated microporous polymers (CMPs) as emerging membrane materials have shown uniform pore size, high surface area, and excellent chemical stability, but their mechanical properties are poor due to their brittleness. Herein, a flexible ionic CMP membrane with precisely tailored pore architecture and chemistry prepared by a coelectropolymerization (COEP) strategy is reported. The structure contains rigid monomers to maintain structural uniformity and flexible and charged monomers to enhance mechanical flexibility and improve ion selectivity by combining precise size sieving and Donnan effect. The resulting 40 nm thick CMP membranes show equivalent ion conductance compared to the commercial Nafion 117 membrane, but an order of magnitude higher ion selectivity for ion systems such as K+/Mg2+ and Li+/Mg2+.

AB - Membranes with fast and selective ion transport have great potential for use in water- and energy-related applications. The structure and material design of the membranes play a key role in improving their performance. Conjugated microporous polymers (CMPs) as emerging membrane materials have shown uniform pore size, high surface area, and excellent chemical stability, but their mechanical properties are poor due to their brittleness. Herein, a flexible ionic CMP membrane with precisely tailored pore architecture and chemistry prepared by a coelectropolymerization (COEP) strategy is reported. The structure contains rigid monomers to maintain structural uniformity and flexible and charged monomers to enhance mechanical flexibility and improve ion selectivity by combining precise size sieving and Donnan effect. The resulting 40 nm thick CMP membranes show equivalent ion conductance compared to the commercial Nafion 117 membrane, but an order of magnitude higher ion selectivity for ion systems such as K+/Mg2+ and Li+/Mg2+.

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DO - 10.1002/adfm.202108672

M3 - Article

SN - 1616-301X

SP - 2108672

JO - Advanced Functional Materials

JF - Advanced Functional Materials

ER -

Flexible Ionic Conjugated Microporous Polymer Membranes for Fast and Selective Ion Transport

Abstract

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