High-Elastic Flame-Retardant Polyacrylate-Based Gel Polymer Electrolyte by Dual-Phase Fluorination for Highly Stable Lithium-Metal Batteries

• DOI: 10.1021/acs.nanolett.5c00251
• Publication Date: 2025-03-18T10:23:00Z
• Authors: Yixin Zhang; Zhongpeng Li; Shaojie Zhang; Jinghao Li; Saihai Lei; Peiyang Dong; Weihao Zeng; Juan Wang; Xingye Chen; Dongqi Li; Shichun Mu
• Keywords: Lithium metal; Polymer Electrolytes

Lithium-metal batteries (LMBs) are emerging as promising energy storage devices due to their exceptional densities. However, uncontrolled lithium dendrite growth and the flammability of liquid electrolytes heavily hinder widespread applications. To circumvent such issues, we develop a dual-phase fluorinated gel polymer electrolyte (TF-GPE), composed framework polymerized by 2,2,2-trifluoroethyl acrylate solvent with fluoroethylene carbonate. The resulting TF-GPE exhibits an impressive tensile elasticity volumetric accommodations repeated deposition stripping up 4000 h. Additionally, demonstrates excellent flame retardancy forming dense fluorine-containing carbon layer. By analyzing surface cycled metal, reveal formation elastic solid interphase structures outer organic inner LiF-rich inorganic layers, enabling stable cycling 500 cycles 80.5% capacity retention for solid-state LMBs at 1 C. Our work presents approach enhancing stability LMBs.