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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster I

CPP 17.28: Poster

Montag, 9. März 2026, 19:00–21:00, P5

Ionic-Liquid-Regulated PVC-Based Solid Polymer Electrolyte for High-Performance Lithium Metal Batteries — •Jiaqi Ding and Peter Müller-Buschbaum — TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany

Lithium metal batteries (LMBs) are regarded as one of the most promising next-generation energy-storage systems owing to their ultrahigh theoretical capacity. However, the safety issues associated with conventional liquid electrolytes, including dendrite-induced short circuits and interfacial instability, severely hinder their practical application. Solid polymer electrolytes (SPEs) offer a potential pathway to address these challenges. In this work, we develop a poly(vinyl carbonate) (PVC)-based solid polymer electrolyte incorporating the ionic liquid [EMI][TFSI] to enhance both ion transport and mechanical integrity. Structural and electrochemical characterizations show that the ionic liquid effectively regulates ion transport within the polymer matrix, enabling the formation of continuous Li ion conduction pathways and improving the compatibility of the electrolyte with lithium metal. This tailored ion-transport behavior leads to enhanced ionic conductivity, mitigated interfacial degradation, and significantly extended cycling stability in LMBs. The results highlight the critical role of ionic-liquid modification in tuning transport properties of polymer electrolytes and provide a viable materials strategy for high-performance lithium metal batteries.

Keywords: Lithium metal batteries; solid polymer electrolyte; Ionic liquid; Ionic conductivity enhancement