In Situ Polymerization Strategies for Interfacial Stability in Solid-State Batteries
Francesco Ciucci a
a Electrode Design, University of Bayreuth
b Present address: University of Bayreuth, Bavarian Center for Battery Technology (BayBatt), Bayreuth, Germany
Proceedings of MATSUS Spring 2026 Conference (MATSUSSpring26)
F1 Safe Materials for Advanced Battery Systems
Barcelona, Spain, 2026 March 23rd - 27th
Organizers: Jingwen Weng and Leiting Zhang
Invited Speaker, Francesco Ciucci, presentation 767
Publication date: 15th December 2025

Solid-state batteries face persistent challenges arising from sluggish ion transport in solids and interfacial instability at solid–solid contacts. This presentation focuses on in situ polymerized electrolyte strategies for stabilizing interfaces and enabling efficient ion transport in solid-state and quasi-solid-state battery architectures. In particular, we examine enthalpy-driven copolymerization pathways leading to quasi-solid-state poly-DOL electrolytes that form conformal, self-limiting interphases directly at electrode–electrolyte interfaces. These in situ-formed polymers combine mechanical compliance with chemical passivation, mitigating interfacial degradation, contact loss, and chemo-mechanical mismatch during cycling. The polymerization process further enables intimate interfacial contact without external pressure or high-temperature processing, improving manufacturability and scalability. This approach is complemented by the integration of halide solid electrolytes with computationally predicted, chemically stable interlayers that suppress parasitic reactions and broaden electrochemical stability windows. Emphasis is placed on establishing simple, transferable design principles that connect first-principles modeling, molecular design, and high-throughput screening workflows. Together, these strategies provide a unified framework for engineering robust interfaces and ion-conducting pathways, ultimately enabling practical, scalable, and durable solid-state battery architectures.

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