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Title: Photo-Cross-Linked Anion Exchange Membranes with Improved Water Management and Conductivity

Abstract

Robust, cross-linked anion exchange membranes (AEMs) were prepared from solvent-processable polyisoprene- ran -poly(vinylbenzyltrimethylammonium chloride) (PI- ran -P- [VBTMA][Cl]) ionomers via photoinitiated thiol - ene chem- istry. Two series of membranes were prepared choosing two dithiol cross-linkers, 1,10-decanedithiol and 2,2 ' - (ethylenedioxy)diethanethiol, selected for their di ff erent hydro- phobicities. A strong correlation was found between the choice of dithiol cross-linker, water uptake, morphology, and the ion conductivity of the membranes. Results were compared with previous fi ndings of thermally cross-linked AEMs from analogous random copolymers. Comparably high chloride ion conductivities were obtained at low to moderate ion exchange capacities (IECs) with signi fi cantly low water uptake values. It was shown that by choosing a hydrophilic cross-linker ion cluster formation may be suppressed and ion conduction improved. This study highlights that it is possible to promote ion conductivities for low IEC membranes (<1 mmol/g) by forming well- connected, ion conducting network morphology. This observation paves the way for mechanically robust ion conducting membranes with enhanced conductivities and better water management.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
U.S. Army Research Laboratory; Argonne National Laboratory - Advanced Photon Source
OSTI Identifier:
1392104
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Macromolecules
Additional Journal Information:
Journal Volume: 49; Journal Issue: 1; Journal ID: ISSN 0024-9297
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English

Citation Formats

Ertem, S. Piril, Tsai, Tsung-Han, Donahue, Melissa M., Zhang, Wenxu, Sarode, Himanshu, Liu, Ye, Seifert, Soenke, Herring, Andrew M., and Coughlin, E. Bryan. Photo-Cross-Linked Anion Exchange Membranes with Improved Water Management and Conductivity. United States: N. p., 2016. Web. doi:10.1021/acs.macromol.5b01784.
Ertem, S. Piril, Tsai, Tsung-Han, Donahue, Melissa M., Zhang, Wenxu, Sarode, Himanshu, Liu, Ye, Seifert, Soenke, Herring, Andrew M., & Coughlin, E. Bryan. Photo-Cross-Linked Anion Exchange Membranes with Improved Water Management and Conductivity. United States. https://doi.org/10.1021/acs.macromol.5b01784
Ertem, S. Piril, Tsai, Tsung-Han, Donahue, Melissa M., Zhang, Wenxu, Sarode, Himanshu, Liu, Ye, Seifert, Soenke, Herring, Andrew M., and Coughlin, E. Bryan. 2016. "Photo-Cross-Linked Anion Exchange Membranes with Improved Water Management and Conductivity". United States. https://doi.org/10.1021/acs.macromol.5b01784.
@article{osti_1392104,
title = {Photo-Cross-Linked Anion Exchange Membranes with Improved Water Management and Conductivity},
author = {Ertem, S. Piril and Tsai, Tsung-Han and Donahue, Melissa M. and Zhang, Wenxu and Sarode, Himanshu and Liu, Ye and Seifert, Soenke and Herring, Andrew M. and Coughlin, E. Bryan},
abstractNote = {Robust, cross-linked anion exchange membranes (AEMs) were prepared from solvent-processable polyisoprene- ran -poly(vinylbenzyltrimethylammonium chloride) (PI- ran -P- [VBTMA][Cl]) ionomers via photoinitiated thiol - ene chem- istry. Two series of membranes were prepared choosing two dithiol cross-linkers, 1,10-decanedithiol and 2,2 ' - (ethylenedioxy)diethanethiol, selected for their di ff erent hydro- phobicities. A strong correlation was found between the choice of dithiol cross-linker, water uptake, morphology, and the ion conductivity of the membranes. Results were compared with previous fi ndings of thermally cross-linked AEMs from analogous random copolymers. Comparably high chloride ion conductivities were obtained at low to moderate ion exchange capacities (IECs) with signi fi cantly low water uptake values. It was shown that by choosing a hydrophilic cross-linker ion cluster formation may be suppressed and ion conduction improved. This study highlights that it is possible to promote ion conductivities for low IEC membranes (<1 mmol/g) by forming well- connected, ion conducting network morphology. This observation paves the way for mechanically robust ion conducting membranes with enhanced conductivities and better water management.},
doi = {10.1021/acs.macromol.5b01784},
url = {https://www.osti.gov/biblio/1392104}, journal = {Macromolecules},
issn = {0024-9297},
number = 1,
volume = 49,
place = {United States},
year = {2016},
month = {1}
}