Synthesis and characterization of BxPU-Liy: A novel polyurethane-based solid electrolyte with disrupted crystallinity for enhanced ion transport

In response to the demand for high-performance and safe batteries in the field of energy storage, a novel polyurethane-based solid electrolyte system, B x PU-Li y , has been developed. Crystallinity had been effectively reduced by incorporating 1,1′-binaphthol with a special molecular structure leading enhanced ion migration. Among that, B 5 PU-Li 20 demonstrates good mechanical properties and thermal stability, with an ionic conductivity of 3.28 × 10 -5 S cm −1 at room temperature, increasing to 2.0 × 10 -4 S cm −1 at 40 °C. Additionally, this material exhibits excellent electrochemical performance and battery cycling capabilities, offering a new direction for the development of high-performance battery technology, with potential applications in portable electronic devices, electric vehicles, and large-scale energy storage systems.