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Ionic Crystalline Microporous Polymers Enable Highly Reversible Conversion Cathodes in Aqueous Batteries

Objective

Rechargeable aqueous batteries (RABs) are promising for sustainable, grid-scale energy storage owing to their high safety, environmental friendliness, and low cost. Within this context, halogen conversion cathodes stand out because they uniquely combine ultra-fast charging, earth-abundant resources, and straightforward recyclability, advantages that conventional cathodes cannot simultaneously achieve. Nevertheless, they remain plagued by numerous problems, including hydrolysis side reactions, shuttle effects, and insufficient confinement of halogen species. These issues cause poor Coulombic efficiency, low energy efficiency, and short cycle life, severely limiting their commercial viability. Two-dimensional (2D) ionic crystalline microporous polymers (i-CMPs), featuring ordered frameworks with tunable ionic groups and well-defined transport pathways, represent an unexplored yet promising platform to regulate halogen transport and interfacial reactions. However, the fundamental mechanisms linking i-CMP structural design to halogen conversion reversibility, kinetics, and durability remain unknown. Here, I propose the ground-breaking concept of employing function-customisable i-CMPs as hosts and additives to regulate halogen species, ions, and water transport and advance the practical RABs. By leveraging ionic side-chain engineering with variations in group type, length, and charge density, structurally stable 2D i-CMPs will be synthesised to enable selective mass transport, targeted immobilization of halogen, and suppressed hydrolysis side reactions. An integrated operando characterization and electrochemical evaluation, featuring the first combination of X-ray computed tomography and X-ray fluorescence, enables non-destructive 3D detection of halogen spatial distribution in real time. This project will establish i-CMP design principles for polymer energy storage, guiding the development of optimal i-CMPs and enabling practical RABs with conversion-type cathodes.

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2025-PF

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Coordinator

TECHNISCHE UNIVERSITAET DRESDEN
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 202 125,12
Address
HELMHOLTZSTRASSE 10
01069 DRESDEN
Germany

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Region
Sachsen Dresden Dresden, Kreisfreie Stadt
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

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