A Fluorine-Rich and Flame-Retardant Gel Polymer Electrolyte Enables by Thermal Polymerization of Fluorinated Acrylates for Stable Quasi-Solid-State Na-ion Battery

Thermal polymerization of fluorinated acrylates yields a fluorine-rich, flame-retardant gel polymer electrolyte with high ionic conductivity and robustness. Beyond enhancing cell safety, it promotes the formation of inorganic-rich electrolyte interphases, enabling reliable quasi-solid-state sodium-ion batteries with superior energy density and cycling stability.