Long-life aqueous organic redox flow batteries enabled by amidoxime-functionalized ion-selective polymer membranes

Ye, Chunchun, Tan, Rui, Wang, Anqi, Chen, Jie, Comesaña Gándara, Bibiana, Breakwell, Charlotte, Alvarez Fernandez, Alberto, Fan, Zhiyu, Weng, Jiaqi, Bezzu, C. Grazia, Guldin, Stefan, Brandon, Nigel P., Kucernak, Anthony R., Jelfs, Kim E., McKeown, Neil B. and Song, Qilei 2022. Long-life aqueous organic redox flow batteries enabled by amidoxime-functionalized ion-selective polymer membranes. Angewandte Chemie International Edition 61 (38) , e202207580. 10.1002/anie.202207580

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Abstract

Redox flow batteries (RFBs) based on aqueous organic electrolytes are a promising technology for safe and cost-effective large-scale electrical energy storage. Membrane separators are a key component in RFBs, allowing fast conduction of charge-carrier ions but minimizing the cross-over of redox-active species. Here, we report the molecular engineering of amidoxime-functionalized Polymers of Intrinsic Microporosity (AO-PIMs) by tuning their polymer chain topology and pore architecture to optimize membrane ion transport functions. AO-PIM membranes are integrated with three emerging aqueous organic flow battery chemistries, and the synergetic integration of ion-selective membranes with molecular engineered organic molecules in neutral-pH electrolytes leads to significantly enhanced cycling stability.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	Wiley
ISSN:	1433-7851
Date of First Compliant Deposit:	4 October 2023
Date of Acceptance:	25 July 2022
Last Modified:	13 Oct 2023 14:00
URI:	https://orca.cardiff.ac.uk/id/eprint/162940

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