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Updated: Jun 11, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Solvent-Type Salt with Dynamic Solvation Reconfiguration Enables Fast-Charging Lithium Metal Batteries
Wenran Wang1,2, Lichang Ji1, Feiyu Luo1,2
1State Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
None:
The solvation structure of Li+ critically governs charge-transfer kinetics and interfacial chemistry in lithium metal batteries (LMBs), yet achieving desired modulation is highly challenging due to the intertwined Li+-anion and solvent interactions. This complexity becomes particularly critical under fast-charging conditions, where sluggish Li+ desolvation and unstable interphases severely limit electrochemical kinetics. Here, we report a "solvent-type" and molecularly engineered lithium organofluorinated aluminate salt (LiFA), with a polyether chain adjacent to the aluminate center, allowing the salt to encapsulate Li+ into its solvation domain, while the electron-deficient aluminate core and bulky fluorinated pendants achieve delocalization of charge and promote Li+ dissociation. In-depth experimental and molecular dynamics analyses reveal that such salt design could enable dynamic reconfiguration of Li+ solvation structures and balance between contact ion pairs and solvent-separated ion pairs, substantially accelerating charge-transfer and stabilizing the interfaces. This "solvent-type" salt strategy offers a dynamic solvation regulation approach to reconfigure the Li+-anion coordination environment and synergistically enhance desolvation kinetics from interfacial stability, shedding light on electrolyte discovery toward fast-charging and durable LMBs.
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