Development of efficient aqueous organic redox flow batteries using ion-sieving sulfonated polymer membranes.

ABSTRACT: 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

SUBMITTER: Ye C 

PROVIDER: S-EPMC9177609 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature