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FM: Fachverband Funktionsmaterialien

FM 11: Poster Session Functional Materials

FM 11.5: Poster

Dienstag, 10. März 2026, 18:00–20:30, P4

Localized High-Concentration High-Entropy Electrolytes for Superior Lithium Metal Anodes via Solvation Cluster Regulation — •Haixuan Luo and Peter Müller-Buschbaum — TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany

The practical deployment of high-energy-density lithium metal batteries (LMBs) is severely hindered by the thermodynamic instability of the lithium metal anode, which precipitates dendritic growth and poor Coulombic efficiency. Although localized high-concentration electrolytes (LHCEs) have emerged as a promising solution, optimizing their cluster configurations to maximize interfacial durability remains a challenge. Herein, we propose a groundbreaking localized high-concentration high-entropy electrolyte (LHCHEE) strategy that leverages the high-entropy effect to tailor solvation structures at the molecular level. Our systematic investigation reveals that the introduced configurational entropy promotes the formation of uniform, anion-rich solvation clusters while suppressing solvent decomposition. This unique solvation environment facilitates the construction of a robust, inorganic-dominated solid electrolyte interphase (SEI) on the lithium metal. Consequently, the LHCHEE enables exceptional stability, while Li||Cu cells demonstrate significantly improved Coulombic efficiency. Furthermore, full cells paired with high-voltage cathodes exhibit remarkable capacity retention. This work not only demonstrates the superiority of LHCHEEs but also establishes entropy engineering as a critical dimension for designing advanced electrolyte systems.

Keywords: Lithium metal battery; High entropy; Localized high-concentration electrolytes; High-voltage cathodes; Solvent structure