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Polymer Electrolyte Interface Engineering for Anodeless Solid-State Batteries

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Sodium batteries are considered a key future technology due to sodium abundance, reduced reliance on critical minerals such as Cu, Co and Ni, and increased safety potential. However, current sodium devices still exhibit lower energy density than Li-ion, limiting broader applications. POLARIS aims to advance high-energy solid-state sodium metal batteries by developing new polymer electrolytes based on poly(ionic liquid) (PolyIL) architectures and engineering electrode interfaces to support dendrite-free, high-efficiency sodium electrochemistry.

The performance of sodium solid-state polymer batteries is strongly determined by the interfacial phenomena at the sodium anode, where metal and polymer electrolyte (SPE) meet, defining efficiency, safety and lifespan. To further increase energy density, simplify manufacturing and ensure safety, forming the Na anode in situ on current collectors (C, Al, Cu, Sn, etc.) is a highly desirable approach.

Thus, beyond characterising bulk properties of the new PolyIL-based SPEs, POLARIS will focus on the anode–polymer interface using advanced in situ spectroscopy (Raman, XPS), AFM, NMR, electron microscopy and molecular dynamics simulations.
The interaction between the SPE and various current collectors (Au, C, Al, Cu, or modified carbons) will be also analysed to maximise Na cycling efficiency on these substrates. Additionally, surface modifications or intermediate interlayers at the anode–electrolyte interface will be investigated to enhance dendrite suppression. POLARIS will explore the role of such layers in delivering sodiophilic elements to properly guide Na plating processes.

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(öffnet in neuem Fenster) ERC-2025-ADG

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Gastgebende Einrichtung

BASQUE CENTER FOR MACROMOLECULAR DESIGN AND ENGINEERING POLYMAT FUNDAZIOA
Netto-EU-Beitrag
€ 2 939 473,55
Adresse
CALLE IBAETA CAMPUS UPV EHU 72
20018 Donostia San Sebastian
Spanien
Region
Noreste País Vasco Gipuzkoa
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Begünstigte (3)