Imperial College London
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ProfessorKimJelfs

Faculty of Natural Sciences, Department of Chemistry

Professor in Computational Materials Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 3438k.jelfs Website

 
 
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Location

 

207AMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ye:2022:10.1038/s41467-022-30943-y,
author = {Ye, C and Wang, A and Breakwell, C and Tan, R and Grazia, Bezzu C and Hunter-Sellars, E and Williams, DR and Brandon, NP and Klusener, PAA and Kucernak, AR and Jelfs, KE and McKeown, NB and Song, Q},
doi = {10.1038/s41467-022-30943-y},
journal = {Nat Commun},
title = {Development of efficient aqueous organic redox flow batteries using ion-sieving sulfonated polymer membranes.},
url = {http://dx.doi.org/10.1038/s41467-022-30943-y},
volume = {13},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Redox flow batteries using aqueous organic-based electrolytes are promising candidates for developing cost-effective grid-scale energy storage devices. However, a significant drawback of these batteries is the cross-mixing of active species through the membrane, which causes battery performance degradation. To overcome this issue, here we report size-selective ion-exchange membranes prepared by sulfonation of a spirobifluorene-based microporous polymer and demonstrate their efficient ion sieving functions in flow batteries. The spirobifluorene unit allows control over the degree of sulfonation to optimize the transport of cations, whilst the microporous structure inhibits the crossover of organic molecules via molecular sieving. Furthermore, the enhanced membrane selectivity mitigates the crossover-induced capacity decay whilst maintaining good ionic conductivity for aqueous electrolyte solution at pH 9, where the redox-active organic molecules show long-term stability. We also prove the boosting effect of the membranes on the energy efficiency and peak power density of the aqueous redox flow battery, which shows stable operation for about 120 h (i.e., 2100 charge-discharge cycles at 100 mA cm-2) in a laboratory-scale cell.
AU  - Ye,C
AU  - Wang,A
AU  - Breakwell,C
AU  - Tan,R
AU  - Grazia,Bezzu C
AU  - Hunter-Sellars,E
AU  - Williams,DR
AU  - Brandon,NP
AU  - Klusener,PAA
AU  - Kucernak,AR
AU  - Jelfs,KE
AU  - McKeown,NB
AU  - Song,Q
DO  - 10.1038/s41467-022-30943-y
PY  - 2022///
TI  - Development of efficient aqueous organic redox flow batteries using ion-sieving sulfonated polymer membranes.
T2  - Nat Commun
UR  - http://dx.doi.org/10.1038/s41467-022-30943-y
UR  - https://www.ncbi.nlm.nih.gov/pubmed/35676263
UR  - http://hdl.handle.net/10044/1/97663
VL  - 13
ER  -
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