Objective
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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Keywords
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.1 - European Research Council (ERC)
MAIN PROGRAMME
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Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-ERC - HORIZON ERC Grants
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) ERC-2025-ADG
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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.
20018 Donostia San Sebastian
Spain
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