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Hydrophilic microporous membranes for selective ion separation and flow-battery energy storage

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Title: Hydrophilic microporous membranes for selective ion separation and flow-battery energy storage
Authors: Tan, R
Wang, A
Malpass-Evans, R
Williams, R
Zhao, EW
Liu, T
Ye, C
Zhou, X
Darwich, BP
Fan, Z
Turcani, L
Jackson, E
Chen, L
Chong, SY
Li, T
Jelfs, KE
Cooper, AI
Brandon, NP
Grey, CP
McKeown, NB
Song, Q
Item Type: Journal Article
Abstract: Membranes with fast and selective ion transport are widely used for water purification and devices for energy conversion and storage including fuel cells, redox flow batteries and electrochemical reactors. However, it remains challenging to design cost-effective, easily processed ion-conductive membranes with well-defined pore architectures. Here, we report a new approach to designing membranes with narrow molecular-sized channels and hydrophilic functionality that enable fast transport of salt ions and high size-exclusion selectivity towards small organic molecules. These membranes, based on polymers of intrinsic microporosity containing Tröger’s base or amidoxime groups, demonstrate that exquisite control over subnanometre pore structure, the introduction of hydrophilic functional groups and thickness control all play important roles in achieving fast ion transport combined with high molecular selectivity. These membranes enable aqueous organic flow batteries with high energy efficiency and high capacity retention, suggesting their utility for a variety of energy-related devices and water purification processes.
Issue Date: 1-Feb-2020
Date of Acceptance: 18-Oct-2019
URI: http://hdl.handle.net/10044/1/75455
DOI: 10.1038/s41563-019-0536-8
ISSN: 1476-1122
Publisher: Nature Research
Start Page: 195
End Page: 202
Journal / Book Title: Nature Materials
Volume: 19
Issue: 2
Copyright Statement: © The Author(s), under exclusive licence to Springer Nature Limited 2019. The final publication is available at Springer Nature via https://doi.org/10.1038/s41563-019-0536-8
Sponsor/Funder: The Royal Society
Commission of the European Communities
The Royal Society
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: UF120469
758370
URF\R\180012
EP/M017257/1
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
ANION-EXCHANGE MEMBRANES
INTRINSIC MICROPOROSITY
POLYMER MEMBRANE
FUEL-CELLS
PERFORMANCE
TRANSPORT
PACKING
PIMS
Nanoscience & Nanotechnology
Publication Status: Published
Online Publication Date: 2019-12-02
Appears in Collections:Faculty of Engineering
Chemistry
Chemical Engineering
Faculty of Natural Sciences