Wang, Anqi;
Tan, Rui;
Liu, Dezhi;
Lu, Jiaxin;
Wei, Xiaochu;
Alvarez-Fernandez, Alberto;
Ye, Chunchun;
... Song, Qilei; + view all
(2023)
Ion-selective Microporous Polymer Membranes with Hydrogen-bond and Salt-bridge Networks for Aqueous Organic Redox Flow Batteries.
Advanced Materials
, Article e2210098. 10.1002/adma.202210098.
(In press).
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Advanced Materials - 2023 - Wang - Ion‐Selective Microporous Polymer Membranes with Hydrogen‐Bond and Salt‐Bridge Networks.pdf Download (11MB) | Preview |
Abstract
Redox flow batteries (RFBs) have great potential for long-duration grid-scale energy storage. Ion conducting membranes are a crucial component in RFBs, allowing charge-carrying ions to transport while preventing the cross-mixing of redox couples. Commercial Nafion membranes are widely used in RFBs, but their unsatisfactory ionic and molecular selectivity as well as high costs limit the performance and the widespread deployment of this technology. To extend the longevity and reduce the cost of RFB systems, inexpensive ion-selective membranes are highly desired that concurrently deliver low ionic resistance and high selectivity towards redox-active species. In this work, high-performance RFB membranes are fabricated from blends of carboxylate- and amidoxime-functionalized polymers of intrinsic microporosity (PIMs) that exploit the beneficial properties of both polymers. The enthalpy-driven formation of cohesive interchain interactions, including hydrogen bonds and salt bridges, facilitates the microscopic miscibility of the blends, while ionizable functional groups within the sub-nanometer pores allow optimization of membrane ion transport functions. The resulting microporous membranes demonstrate fast cation conduction with low crossover of redox-active molecular species, enabling improved power ratings and reduced capacity fade in aqueous RFBs using anthraquinone and ferrocyanide as redox couples. This article is protected by copyright. All rights reserved.
| Type: | Article |
|---|---|
| Title: | Ion-selective Microporous Polymer Membranes with Hydrogen-bond and Salt-bridge Networks for Aqueous Organic Redox Flow Batteries |
| Location: | Germany |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/adma.202210098 |
| Publisher version: | https://doi.org/10.1002/adma.202210098 |
| Language: | English |
| Additional information: | Copyright © 2023 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | energy storage, ion conducting membranes, microporous polymers, redox flow batteries |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10163411 |
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